ru-se.com

option.php (76561B)

---

 <?php
 /**
  * Option API
  *
  * @package WordPress
  * @subpackage Option
  */
 
 /**
  * Retrieves an option value based on an option name.
  *
  * If the option does not exist, and a default value is not provided,
  * boolean false is returned. This could be used to check whether you need
  * to initialize an option during installation of a plugin, however that
  * can be done better by using add_option() which will not overwrite
  * existing options.
  *
  * Not initializing an option and using boolean `false` as a return value
  * is a bad practice as it triggers an additional database query.
  *
  * The type of the returned value can be different from the type that was passed
  * when saving or updating the option. If the option value was serialized,
  * then it will be unserialized when it is returned. In this case the type will
  * be the same. For example, storing a non-scalar value like an array will
  * return the same array.
  *
  * In most cases non-string scalar and null values will be converted and returned
  * as string equivalents.
  *
  * Exceptions:
  * 1. When the option has not been saved in the database, the `$default` value
  *    is returned if provided. If not, boolean `false` is returned.
  * 2. When one of the Options API filters is used: {@see 'pre_option_{$option}'},
  *    {@see 'default_option_{$option}'}, or {@see 'option_{$option}'}, the returned
  *    value may not match the expected type.
  * 3. When the option has just been saved in the database, and get_option()
  *    is used right after, non-string scalar and null values are not converted to
  *    string equivalents and the original type is returned.
  *
  * Examples:
  *
  * When adding options like this: `add_option( 'my_option_name', 'value' );`
  * and then retrieving them with `get_option( 'my_option_name' );`, the returned
  * values will be:
  *
  * `false` returns `string(0) ""`
  * `true`  returns `string(1) "1"`
  * `0`     returns `string(1) "0"`
  * `1`     returns `string(1) "1"`
  * `'0'`   returns `string(1) "0"`
  * `'1'`   returns `string(1) "1"`
  * `null`  returns `string(0) ""`
  *
  * When adding options with non-scalar values like
  * `add_option( 'my_array', array( false, 'str', null ) );`, the returned value
  * will be identical to the original as it is serialized before saving
  * it in the database:
  *
  *    array(3) {
  *        [0] => bool(false)
  *        [1] => string(3) "str"
  *        [2] => NULL
  *    }
  *
  * @since 1.5.0
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string $option  Name of the option to retrieve. Expected to not be SQL-escaped.
  * @param mixed  $default Optional. Default value to return if the option does not exist.
  * @return mixed Value of the option. A value of any type may be returned, including
  *               scalar (string, boolean, float, integer), null, array, object.
  *               Scalar and null values will be returned as strings as long as they originate
  *               from a database stored option value. If there is no option in the database,
  *               boolean `false` is returned.
  */
 function get_option( $option, $default = false ) {
 	global $wpdb;
 
 	$option = trim( $option );
 	if ( empty( $option ) ) {
 		return false;
 	}
 
 	/*
 	 * Until a proper _deprecated_option() function can be introduced,
 	 * redirect requests to deprecated keys to the new, correct ones.
 	 */
 	$deprecated_keys = array(
 		'blacklist_keys'    => 'disallowed_keys',
 		'comment_whitelist' => 'comment_previously_approved',
 	);
 
 	if ( ! wp_installing() && isset( $deprecated_keys[ $option ] ) ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'5.5.0',
 			sprintf(
 				/* translators: 1: Deprecated option key, 2: New option key. */
 				__( 'The "%1$s" option key has been renamed to "%2$s".' ),
 				$option,
 				$deprecated_keys[ $option ]
 			)
 		);
 		return get_option( $deprecated_keys[ $option ], $default );
 	}
 
 	/**
 	 * Filters the value of an existing option before it is retrieved.
 	 *
 	 * The dynamic portion of the hook name, `$option`, refers to the option name.
 	 *
 	 * Returning a truthy value from the filter will effectively short-circuit retrieval
 	 * and return the passed value instead.
 	 *
 	 * @since 1.5.0
 	 * @since 4.4.0 The `$option` parameter was added.
 	 * @since 4.9.0 The `$default` parameter was added.
 	 *
 	 * @param mixed  $pre_option The value to return instead of the option value. This differs
 	 *                           from `$default`, which is used as the fallback value in the event
 	 *                           the option doesn't exist elsewhere in get_option().
 	 *                           Default false (to skip past the short-circuit).
 	 * @param string $option     Option name.
 	 * @param mixed  $default    The fallback value to return if the option does not exist.
 	 *                           Default false.
 	 */
 	$pre = apply_filters( "pre_option_{$option}", false, $option, $default );
 
 	if ( false !== $pre ) {
 		return $pre;
 	}
 
 	if ( defined( 'WP_SETUP_CONFIG' ) ) {
 		return false;
 	}
 
 	// Distinguish between `false` as a default, and not passing one.
 	$passed_default = func_num_args() > 1;
 
 	if ( ! wp_installing() ) {
 		// Prevent non-existent options from triggering multiple queries.
 		$notoptions = wp_cache_get( 'notoptions', 'options' );
 
 		if ( isset( $notoptions[ $option ] ) ) {
 			/**
 			 * Filters the default value for an option.
 			 *
 			 * The dynamic portion of the hook name, `$option`, refers to the option name.
 			 *
 			 * @since 3.4.0
 			 * @since 4.4.0 The `$option` parameter was added.
 			 * @since 4.7.0 The `$passed_default` parameter was added to distinguish between a `false` value and the default parameter value.
 			 *
 			 * @param mixed  $default The default value to return if the option does not exist
 			 *                        in the database.
 			 * @param string $option  Option name.
 			 * @param bool   $passed_default Was `get_option()` passed a default value?
 			 */
 			return apply_filters( "default_option_{$option}", $default, $option, $passed_default );
 		}
 
 		$alloptions = wp_load_alloptions();
 
 		if ( isset( $alloptions[ $option ] ) ) {
 			$value = $alloptions[ $option ];
 		} else {
 			$value = wp_cache_get( $option, 'options' );
 
 			if ( false === $value ) {
 				$row = $wpdb->get_row( $wpdb->prepare( "SELECT option_value FROM $wpdb->options WHERE option_name = %s LIMIT 1", $option ) );
 
 				// Has to be get_row() instead of get_var() because of funkiness with 0, false, null values.
 				if ( is_object( $row ) ) {
 					$value = $row->option_value;
 					wp_cache_add( $option, $value, 'options' );
 				} else { // Option does not exist, so we must cache its non-existence.
 					if ( ! is_array( $notoptions ) ) {
 						$notoptions = array();
 					}
 
 					$notoptions[ $option ] = true;
 					wp_cache_set( 'notoptions', $notoptions, 'options' );
 
 					/** This filter is documented in wp-includes/option.php */
 					return apply_filters( "default_option_{$option}", $default, $option, $passed_default );
 				}
 			}
 		}
 	} else {
 		$suppress = $wpdb->suppress_errors();
 		$row      = $wpdb->get_row( $wpdb->prepare( "SELECT option_value FROM $wpdb->options WHERE option_name = %s LIMIT 1", $option ) );
 		$wpdb->suppress_errors( $suppress );
 
 		if ( is_object( $row ) ) {
 			$value = $row->option_value;
 		} else {
 			/** This filter is documented in wp-includes/option.php */
 			return apply_filters( "default_option_{$option}", $default, $option, $passed_default );
 		}
 	}
 
 	// If home is not set, use siteurl.
 	if ( 'home' === $option && '' === $value ) {
 		return get_option( 'siteurl' );
 	}
 
 	if ( in_array( $option, array( 'siteurl', 'home', 'category_base', 'tag_base' ), true ) ) {
 		$value = untrailingslashit( $value );
 	}
 
 	/**
 	 * Filters the value of an existing option.
 	 *
 	 * The dynamic portion of the hook name, `$option`, refers to the option name.
 	 *
 	 * @since 1.5.0 As 'option_' . $setting
 	 * @since 3.0.0
 	 * @since 4.4.0 The `$option` parameter was added.
 	 *
 	 * @param mixed  $value  Value of the option. If stored serialized, it will be
 	 *                       unserialized prior to being returned.
 	 * @param string $option Option name.
 	 */
 	return apply_filters( "option_{$option}", maybe_unserialize( $value ), $option );
 }
 
 /**
  * Protects WordPress special option from being modified.
  *
  * Will die if $option is in protected list. Protected options are 'alloptions'
  * and 'notoptions' options.
  *
  * @since 2.2.0
  *
  * @param string $option Option name.
  */
 function wp_protect_special_option( $option ) {
 	if ( 'alloptions' === $option || 'notoptions' === $option ) {
 		wp_die(
 			sprintf(
 				/* translators: %s: Option name. */
 				__( '%s is a protected WP option and may not be modified' ),
 				esc_html( $option )
 			)
 		);
 	}
 }
 
 /**
  * Prints option value after sanitizing for forms.
  *
  * @since 1.5.0
  *
  * @param string $option Option name.
  */
 function form_option( $option ) {
 	echo esc_attr( get_option( $option ) );
 }
 
 /**
  * Loads and caches all autoloaded options, if available or all options.
  *
  * @since 2.2.0
  * @since 5.3.1 The `$force_cache` parameter was added.
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param bool $force_cache Optional. Whether to force an update of the local cache
  *                          from the persistent cache. Default false.
  * @return array List of all options.
  */
 function wp_load_alloptions( $force_cache = false ) {
 	global $wpdb;
 
 	if ( ! wp_installing() || ! is_multisite() ) {
 		$alloptions = wp_cache_get( 'alloptions', 'options', $force_cache );
 	} else {
 		$alloptions = false;
 	}
 
 	if ( ! $alloptions ) {
 		$suppress      = $wpdb->suppress_errors();
 		$alloptions_db = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options WHERE autoload = 'yes'" );
 		if ( ! $alloptions_db ) {
 			$alloptions_db = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options" );
 		}
 		$wpdb->suppress_errors( $suppress );
 
 		$alloptions = array();
 		foreach ( (array) $alloptions_db as $o ) {
 			$alloptions[ $o->option_name ] = $o->option_value;
 		}
 
 		if ( ! wp_installing() || ! is_multisite() ) {
 			/**
 			 * Filters all options before caching them.
 			 *
 			 * @since 4.9.0
 			 *
 			 * @param array $alloptions Array with all options.
 			 */
 			$alloptions = apply_filters( 'pre_cache_alloptions', $alloptions );
 
 			wp_cache_add( 'alloptions', $alloptions, 'options' );
 		}
 	}
 
 	/**
 	 * Filters all options after retrieving them.
 	 *
 	 * @since 4.9.0
 	 *
 	 * @param array $alloptions Array with all options.
 	 */
 	return apply_filters( 'alloptions', $alloptions );
 }
 
 /**
  * Loads and caches certain often requested site options if is_multisite() and a persistent cache is not being used.
  *
  * @since 3.0.0
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param int $network_id Optional site ID for which to query the options. Defaults to the current site.
  */
 function wp_load_core_site_options( $network_id = null ) {
 	global $wpdb;
 
 	if ( ! is_multisite() || wp_using_ext_object_cache() || wp_installing() ) {
 		return;
 	}
 
 	if ( empty( $network_id ) ) {
 		$network_id = get_current_network_id();
 	}
 
 	$core_options = array( 'site_name', 'siteurl', 'active_sitewide_plugins', '_site_transient_timeout_theme_roots', '_site_transient_theme_roots', 'site_admins', 'can_compress_scripts', 'global_terms_enabled', 'ms_files_rewriting' );
 
 	$core_options_in = "'" . implode( "', '", $core_options ) . "'";
 	$options         = $wpdb->get_results( $wpdb->prepare( "SELECT meta_key, meta_value FROM $wpdb->sitemeta WHERE meta_key IN ($core_options_in) AND site_id = %d", $network_id ) );
 
 	foreach ( $options as $option ) {
 		$key                = $option->meta_key;
 		$cache_key          = "{$network_id}:$key";
 		$option->meta_value = maybe_unserialize( $option->meta_value );
 
 		wp_cache_set( $cache_key, $option->meta_value, 'site-options' );
 	}
 }
 
 /**
  * Updates the value of an option that was already added.
  *
  * You do not need to serialize values. If the value needs to be serialized,
  * then it will be serialized before it is inserted into the database.
  * Remember, resources cannot be serialized or added as an option.
  *
  * If the option does not exist, it will be created.
 
  * This function is designed to work with or without a logged-in user. In terms of security,
  * plugin developers should check the current user's capabilities before updating any options.
  *
  * @since 1.0.0
  * @since 4.2.0 The `$autoload` parameter was added.
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string      $option   Name of the option to update. Expected to not be SQL-escaped.
  * @param mixed       $value    Option value. Must be serializable if non-scalar. Expected to not be SQL-escaped.
  * @param string|bool $autoload Optional. Whether to load the option when WordPress starts up. For existing options,
  *                              `$autoload` can only be updated using `update_option()` if `$value` is also changed.
  *                              Accepts 'yes'|true to enable or 'no'|false to disable. For non-existent options,
  *                              the default value is 'yes'. Default null.
  * @return bool True if the value was updated, false otherwise.
  */
 function update_option( $option, $value, $autoload = null ) {
 	global $wpdb;
 
 	$option = trim( $option );
 	if ( empty( $option ) ) {
 		return false;
 	}
 
 	/*
 	 * Until a proper _deprecated_option() function can be introduced,
 	 * redirect requests to deprecated keys to the new, correct ones.
 	 */
 	$deprecated_keys = array(
 		'blacklist_keys'    => 'disallowed_keys',
 		'comment_whitelist' => 'comment_previously_approved',
 	);
 
 	if ( ! wp_installing() && isset( $deprecated_keys[ $option ] ) ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'5.5.0',
 			sprintf(
 				/* translators: 1: Deprecated option key, 2: New option key. */
 				__( 'The "%1$s" option key has been renamed to "%2$s".' ),
 				$option,
 				$deprecated_keys[ $option ]
 			)
 		);
 		return update_option( $deprecated_keys[ $option ], $value, $autoload );
 	}
 
 	wp_protect_special_option( $option );
 
 	if ( is_object( $value ) ) {
 		$value = clone $value;
 	}
 
 	$value     = sanitize_option( $option, $value );
 	$old_value = get_option( $option );
 
 	/**
 	 * Filters a specific option before its value is (maybe) serialized and updated.
 	 *
 	 * The dynamic portion of the hook name, `$option`, refers to the option name.
 	 *
 	 * @since 2.6.0
 	 * @since 4.4.0 The `$option` parameter was added.
 	 *
 	 * @param mixed  $value     The new, unserialized option value.
 	 * @param mixed  $old_value The old option value.
 	 * @param string $option    Option name.
 	 */
 	$value = apply_filters( "pre_update_option_{$option}", $value, $old_value, $option );
 
 	/**
 	 * Filters an option before its value is (maybe) serialized and updated.
 	 *
 	 * @since 3.9.0
 	 *
 	 * @param mixed  $value     The new, unserialized option value.
 	 * @param string $option    Name of the option.
 	 * @param mixed  $old_value The old option value.
 	 */
 	$value = apply_filters( 'pre_update_option', $value, $option, $old_value );
 
 	/*
 	 * If the new and old values are the same, no need to update.
 	 *
 	 * Unserialized values will be adequate in most cases. If the unserialized
 	 * data differs, the (maybe) serialized data is checked to avoid
 	 * unnecessary database calls for otherwise identical object instances.
 	 *
 	 * See https://core.trac.wordpress.org/ticket/38903
 	 */
 	if ( $value === $old_value || maybe_serialize( $value ) === maybe_serialize( $old_value ) ) {
 		return false;
 	}
 
 	/** This filter is documented in wp-includes/option.php */
 	if ( apply_filters( "default_option_{$option}", false, $option, false ) === $old_value ) {
 		// Default setting for new options is 'yes'.
 		if ( null === $autoload ) {
 			$autoload = 'yes';
 		}
 
 		return add_option( $option, $value, '', $autoload );
 	}
 
 	$serialized_value = maybe_serialize( $value );
 
 	/**
 	 * Fires immediately before an option value is updated.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @param string $option    Name of the option to update.
 	 * @param mixed  $old_value The old option value.
 	 * @param mixed  $value     The new option value.
 	 */
 	do_action( 'update_option', $option, $old_value, $value );
 
 	$update_args = array(
 		'option_value' => $serialized_value,
 	);
 
 	if ( null !== $autoload ) {
 		$update_args['autoload'] = ( 'no' === $autoload || false === $autoload ) ? 'no' : 'yes';
 	}
 
 	$result = $wpdb->update( $wpdb->options, $update_args, array( 'option_name' => $option ) );
 	if ( ! $result ) {
 		return false;
 	}
 
 	$notoptions = wp_cache_get( 'notoptions', 'options' );
 
 	if ( is_array( $notoptions ) && isset( $notoptions[ $option ] ) ) {
 		unset( $notoptions[ $option ] );
 		wp_cache_set( 'notoptions', $notoptions, 'options' );
 	}
 
 	if ( ! wp_installing() ) {
 		$alloptions = wp_load_alloptions( true );
 		if ( isset( $alloptions[ $option ] ) ) {
 			$alloptions[ $option ] = $serialized_value;
 			wp_cache_set( 'alloptions', $alloptions, 'options' );
 		} else {
 			wp_cache_set( $option, $serialized_value, 'options' );
 		}
 	}
 
 	/**
 	 * Fires after the value of a specific option has been successfully updated.
 	 *
 	 * The dynamic portion of the hook name, `$option`, refers to the option name.
 	 *
 	 * @since 2.0.1
 	 * @since 4.4.0 The `$option` parameter was added.
 	 *
 	 * @param mixed  $old_value The old option value.
 	 * @param mixed  $value     The new option value.
 	 * @param string $option    Option name.
 	 */
 	do_action( "update_option_{$option}", $old_value, $value, $option );
 
 	/**
 	 * Fires after the value of an option has been successfully updated.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @param string $option    Name of the updated option.
 	 * @param mixed  $old_value The old option value.
 	 * @param mixed  $value     The new option value.
 	 */
 	do_action( 'updated_option', $option, $old_value, $value );
 
 	return true;
 }
 
 /**
  * Adds a new option.
  *
  * You do not need to serialize values. If the value needs to be serialized,
  * then it will be serialized before it is inserted into the database.
  * Remember, resources cannot be serialized or added as an option.
  *
  * You can create options without values and then update the values later.
  * Existing options will not be updated and checks are performed to ensure that you
  * aren't adding a protected WordPress option. Care should be taken to not name
  * options the same as the ones which are protected.
  *
  * @since 1.0.0
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string      $option     Name of the option to add. Expected to not be SQL-escaped.
  * @param mixed       $value      Optional. Option value. Must be serializable if non-scalar.
  *                                Expected to not be SQL-escaped.
  * @param string      $deprecated Optional. Description. Not used anymore.
  * @param string|bool $autoload   Optional. Whether to load the option when WordPress starts up.
  *                                Default is enabled. Accepts 'no' to disable for legacy reasons.
  * @return bool True if the option was added, false otherwise.
  */
 function add_option( $option, $value = '', $deprecated = '', $autoload = 'yes' ) {
 	global $wpdb;
 
 	if ( ! empty( $deprecated ) ) {
 		_deprecated_argument( __FUNCTION__, '2.3.0' );
 	}
 
 	$option = trim( $option );
 	if ( empty( $option ) ) {
 		return false;
 	}
 
 	/*
 	 * Until a proper _deprecated_option() function can be introduced,
 	 * redirect requests to deprecated keys to the new, correct ones.
 	 */
 	$deprecated_keys = array(
 		'blacklist_keys'    => 'disallowed_keys',
 		'comment_whitelist' => 'comment_previously_approved',
 	);
 
 	if ( ! wp_installing() && isset( $deprecated_keys[ $option ] ) ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'5.5.0',
 			sprintf(
 				/* translators: 1: Deprecated option key, 2: New option key. */
 				__( 'The "%1$s" option key has been renamed to "%2$s".' ),
 				$option,
 				$deprecated_keys[ $option ]
 			)
 		);
 		return add_option( $deprecated_keys[ $option ], $value, $deprecated, $autoload );
 	}
 
 	wp_protect_special_option( $option );
 
 	if ( is_object( $value ) ) {
 		$value = clone $value;
 	}
 
 	$value = sanitize_option( $option, $value );
 
 	// Make sure the option doesn't already exist.
 	// We can check the 'notoptions' cache before we ask for a DB query.
 	$notoptions = wp_cache_get( 'notoptions', 'options' );
 
 	if ( ! is_array( $notoptions ) || ! isset( $notoptions[ $option ] ) ) {
 		/** This filter is documented in wp-includes/option.php */
 		if ( apply_filters( "default_option_{$option}", false, $option, false ) !== get_option( $option ) ) {
 			return false;
 		}
 	}
 
 	$serialized_value = maybe_serialize( $value );
 	$autoload         = ( 'no' === $autoload || false === $autoload ) ? 'no' : 'yes';
 
 	/**
 	 * Fires before an option is added.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @param string $option Name of the option to add.
 	 * @param mixed  $value  Value of the option.
 	 */
 	do_action( 'add_option', $option, $value );
 
 	$result = $wpdb->query( $wpdb->prepare( "INSERT INTO `$wpdb->options` (`option_name`, `option_value`, `autoload`) VALUES (%s, %s, %s) ON DUPLICATE KEY UPDATE `option_name` = VALUES(`option_name`), `option_value` = VALUES(`option_value`), `autoload` = VALUES(`autoload`)", $option, $serialized_value, $autoload ) );
 	if ( ! $result ) {
 		return false;
 	}
 
 	if ( ! wp_installing() ) {
 		if ( 'yes' === $autoload ) {
 			$alloptions            = wp_load_alloptions( true );
 			$alloptions[ $option ] = $serialized_value;
 			wp_cache_set( 'alloptions', $alloptions, 'options' );
 		} else {
 			wp_cache_set( $option, $serialized_value, 'options' );
 		}
 	}
 
 	// This option exists now.
 	$notoptions = wp_cache_get( 'notoptions', 'options' ); // Yes, again... we need it to be fresh.
 
 	if ( is_array( $notoptions ) && isset( $notoptions[ $option ] ) ) {
 		unset( $notoptions[ $option ] );
 		wp_cache_set( 'notoptions', $notoptions, 'options' );
 	}
 
 	/**
 	 * Fires after a specific option has been added.
 	 *
 	 * The dynamic portion of the hook name, `$option`, refers to the option name.
 	 *
 	 * @since 2.5.0 As "add_option_{$name}"
 	 * @since 3.0.0
 	 *
 	 * @param string $option Name of the option to add.
 	 * @param mixed  $value  Value of the option.
 	 */
 	do_action( "add_option_{$option}", $option, $value );
 
 	/**
 	 * Fires after an option has been added.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @param string $option Name of the added option.
 	 * @param mixed  $value  Value of the option.
 	 */
 	do_action( 'added_option', $option, $value );
 
 	return true;
 }
 
 /**
  * Removes option by name. Prevents removal of protected WordPress options.
  *
  * @since 1.2.0
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string $option Name of the option to delete. Expected to not be SQL-escaped.
  * @return bool True if the option was deleted, false otherwise.
  */
 function delete_option( $option ) {
 	global $wpdb;
 
 	$option = trim( $option );
 	if ( empty( $option ) ) {
 		return false;
 	}
 
 	wp_protect_special_option( $option );
 
 	// Get the ID, if no ID then return.
 	$row = $wpdb->get_row( $wpdb->prepare( "SELECT autoload FROM $wpdb->options WHERE option_name = %s", $option ) );
 	if ( is_null( $row ) ) {
 		return false;
 	}
 
 	/**
 	 * Fires immediately before an option is deleted.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @param string $option Name of the option to delete.
 	 */
 	do_action( 'delete_option', $option );
 
 	$result = $wpdb->delete( $wpdb->options, array( 'option_name' => $option ) );
 
 	if ( ! wp_installing() ) {
 		if ( 'yes' === $row->autoload ) {
 			$alloptions = wp_load_alloptions( true );
 			if ( is_array( $alloptions ) && isset( $alloptions[ $option ] ) ) {
 				unset( $alloptions[ $option ] );
 				wp_cache_set( 'alloptions', $alloptions, 'options' );
 			}
 		} else {
 			wp_cache_delete( $option, 'options' );
 		}
 	}
 
 	if ( $result ) {
 
 		/**
 		 * Fires after a specific option has been deleted.
 		 *
 		 * The dynamic portion of the hook name, `$option`, refers to the option name.
 		 *
 		 * @since 3.0.0
 		 *
 		 * @param string $option Name of the deleted option.
 		 */
 		do_action( "delete_option_{$option}", $option );
 
 		/**
 		 * Fires after an option has been deleted.
 		 *
 		 * @since 2.9.0
 		 *
 		 * @param string $option Name of the deleted option.
 		 */
 		do_action( 'deleted_option', $option );
 
 		return true;
 	}
 
 	return false;
 }
 
 /**
  * Deletes a transient.
  *
  * @since 2.8.0
  *
  * @param string $transient Transient name. Expected to not be SQL-escaped.
  * @return bool True if the transient was deleted, false otherwise.
  */
 function delete_transient( $transient ) {
 
 	/**
 	 * Fires immediately before a specific transient is deleted.
 	 *
 	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
 	 *
 	 * @since 3.0.0
 	 *
 	 * @param string $transient Transient name.
 	 */
 	do_action( "delete_transient_{$transient}", $transient );
 
 	if ( wp_using_ext_object_cache() ) {
 		$result = wp_cache_delete( $transient, 'transient' );
 	} else {
 		$option_timeout = '_transient_timeout_' . $transient;
 		$option         = '_transient_' . $transient;
 		$result         = delete_option( $option );
 
 		if ( $result ) {
 			delete_option( $option_timeout );
 		}
 	}
 
 	if ( $result ) {
 
 		/**
 		 * Fires after a transient is deleted.
 		 *
 		 * @since 3.0.0
 		 *
 		 * @param string $transient Deleted transient name.
 		 */
 		do_action( 'deleted_transient', $transient );
 	}
 
 	return $result;
 }
 
 /**
  * Retrieves the value of a transient.
  *
  * If the transient does not exist, does not have a value, or has expired,
  * then the return value will be false.
  *
  * @since 2.8.0
  *
  * @param string $transient Transient name. Expected to not be SQL-escaped.
  * @return mixed Value of transient.
  */
 function get_transient( $transient ) {
 
 	/**
 	 * Filters the value of an existing transient before it is retrieved.
 	 *
 	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
 	 *
 	 * Returning a truthy value from the filter will effectively short-circuit retrieval
 	 * and return the passed value instead.
 	 *
 	 * @since 2.8.0
 	 * @since 4.4.0 The `$transient` parameter was added
 	 *
 	 * @param mixed  $pre_transient The default value to return if the transient does not exist.
 	 *                              Any value other than false will short-circuit the retrieval
 	 *                              of the transient, and return that value.
 	 * @param string $transient     Transient name.
 	 */
 	$pre = apply_filters( "pre_transient_{$transient}", false, $transient );
 
 	if ( false !== $pre ) {
 		return $pre;
 	}
 
 	if ( wp_using_ext_object_cache() ) {
 		$value = wp_cache_get( $transient, 'transient' );
 	} else {
 		$transient_option = '_transient_' . $transient;
 		if ( ! wp_installing() ) {
 			// If option is not in alloptions, it is not autoloaded and thus has a timeout.
 			$alloptions = wp_load_alloptions();
 			if ( ! isset( $alloptions[ $transient_option ] ) ) {
 				$transient_timeout = '_transient_timeout_' . $transient;
 				$timeout           = get_option( $transient_timeout );
 				if ( false !== $timeout && $timeout < time() ) {
 					delete_option( $transient_option );
 					delete_option( $transient_timeout );
 					$value = false;
 				}
 			}
 		}
 
 		if ( ! isset( $value ) ) {
 			$value = get_option( $transient_option );
 		}
 	}
 
 	/**
 	 * Filters an existing transient's value.
 	 *
 	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
 	 *
 	 * @since 2.8.0
 	 * @since 4.4.0 The `$transient` parameter was added
 	 *
 	 * @param mixed  $value     Value of transient.
 	 * @param string $transient Transient name.
 	 */
 	return apply_filters( "transient_{$transient}", $value, $transient );
 }
 
 /**
  * Sets/updates the value of a transient.
  *
  * You do not need to serialize values. If the value needs to be serialized,
  * then it will be serialized before it is set.
  *
  * @since 2.8.0
  *
  * @param string $transient  Transient name. Expected to not be SQL-escaped.
  *                           Must be 172 characters or fewer in length.
  * @param mixed  $value      Transient value. Must be serializable if non-scalar.
  *                           Expected to not be SQL-escaped.
  * @param int    $expiration Optional. Time until expiration in seconds. Default 0 (no expiration).
  * @return bool True if the value was set, false otherwise.
  */
 function set_transient( $transient, $value, $expiration = 0 ) {
 
 	$expiration = (int) $expiration;
 
 	/**
 	 * Filters a specific transient before its value is set.
 	 *
 	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
 	 *
 	 * @since 3.0.0
 	 * @since 4.2.0 The `$expiration` parameter was added.
 	 * @since 4.4.0 The `$transient` parameter was added.
 	 *
 	 * @param mixed  $value      New value of transient.
 	 * @param int    $expiration Time until expiration in seconds.
 	 * @param string $transient  Transient name.
 	 */
 	$value = apply_filters( "pre_set_transient_{$transient}", $value, $expiration, $transient );
 
 	/**
 	 * Filters the expiration for a transient before its value is set.
 	 *
 	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
 	 *
 	 * @since 4.4.0
 	 *
 	 * @param int    $expiration Time until expiration in seconds. Use 0 for no expiration.
 	 * @param mixed  $value      New value of transient.
 	 * @param string $transient  Transient name.
 	 */
 	$expiration = apply_filters( "expiration_of_transient_{$transient}", $expiration, $value, $transient );
 
 	if ( wp_using_ext_object_cache() ) {
 		$result = wp_cache_set( $transient, $value, 'transient', $expiration );
 	} else {
 		$transient_timeout = '_transient_timeout_' . $transient;
 		$transient_option  = '_transient_' . $transient;
 
 		if ( false === get_option( $transient_option ) ) {
 			$autoload = 'yes';
 			if ( $expiration ) {
 				$autoload = 'no';
 				add_option( $transient_timeout, time() + $expiration, '', 'no' );
 			}
 			$result = add_option( $transient_option, $value, '', $autoload );
 		} else {
 			// If expiration is requested, but the transient has no timeout option,
 			// delete, then re-create transient rather than update.
 			$update = true;
 
 			if ( $expiration ) {
 				if ( false === get_option( $transient_timeout ) ) {
 					delete_option( $transient_option );
 					add_option( $transient_timeout, time() + $expiration, '', 'no' );
 					$result = add_option( $transient_option, $value, '', 'no' );
 					$update = false;
 				} else {
 					update_option( $transient_timeout, time() + $expiration );
 				}
 			}
 
 			if ( $update ) {
 				$result = update_option( $transient_option, $value );
 			}
 		}
 	}
 
 	if ( $result ) {
 
 		/**
 		 * Fires after the value for a specific transient has been set.
 		 *
 		 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
 		 *
 		 * @since 3.0.0
 		 * @since 3.6.0 The `$value` and `$expiration` parameters were added.
 		 * @since 4.4.0 The `$transient` parameter was added.
 		 *
 		 * @param mixed  $value      Transient value.
 		 * @param int    $expiration Time until expiration in seconds.
 		 * @param string $transient  The name of the transient.
 		 */
 		do_action( "set_transient_{$transient}", $value, $expiration, $transient );
 
 		/**
 		 * Fires after the value for a transient has been set.
 		 *
 		 * @since 3.0.0
 		 * @since 3.6.0 The `$value` and `$expiration` parameters were added.
 		 *
 		 * @param string $transient  The name of the transient.
 		 * @param mixed  $value      Transient value.
 		 * @param int    $expiration Time until expiration in seconds.
 		 */
 		do_action( 'setted_transient', $transient, $value, $expiration );
 	}
 
 	return $result;
 }
 
 /**
  * Deletes all expired transients.
  *
  * The multi-table delete syntax is used to delete the transient record
  * from table a, and the corresponding transient_timeout record from table b.
  *
  * @since 4.9.0
  *
  * @param bool $force_db Optional. Force cleanup to run against the database even when an external object cache is used.
  */
 function delete_expired_transients( $force_db = false ) {
 	global $wpdb;
 
 	if ( ! $force_db && wp_using_ext_object_cache() ) {
 		return;
 	}
 
 	$wpdb->query(
 		$wpdb->prepare(
 			"DELETE a, b FROM {$wpdb->options} a, {$wpdb->options} b
 			WHERE a.option_name LIKE %s
 			AND a.option_name NOT LIKE %s
 			AND b.option_name = CONCAT( '_transient_timeout_', SUBSTRING( a.option_name, 12 ) )
 			AND b.option_value < %d",
 			$wpdb->esc_like( '_transient_' ) . '%',
 			$wpdb->esc_like( '_transient_timeout_' ) . '%',
 			time()
 		)
 	);
 
 	if ( ! is_multisite() ) {
 		// Single site stores site transients in the options table.
 		$wpdb->query(
 			$wpdb->prepare(
 				"DELETE a, b FROM {$wpdb->options} a, {$wpdb->options} b
 				WHERE a.option_name LIKE %s
 				AND a.option_name NOT LIKE %s
 				AND b.option_name = CONCAT( '_site_transient_timeout_', SUBSTRING( a.option_name, 17 ) )
 				AND b.option_value < %d",
 				$wpdb->esc_like( '_site_transient_' ) . '%',
 				$wpdb->esc_like( '_site_transient_timeout_' ) . '%',
 				time()
 			)
 		);
 	} elseif ( is_multisite() && is_main_site() && is_main_network() ) {
 		// Multisite stores site transients in the sitemeta table.
 		$wpdb->query(
 			$wpdb->prepare(
 				"DELETE a, b FROM {$wpdb->sitemeta} a, {$wpdb->sitemeta} b
 				WHERE a.meta_key LIKE %s
 				AND a.meta_key NOT LIKE %s
 				AND b.meta_key = CONCAT( '_site_transient_timeout_', SUBSTRING( a.meta_key, 17 ) )
 				AND b.meta_value < %d",
 				$wpdb->esc_like( '_site_transient_' ) . '%',
 				$wpdb->esc_like( '_site_transient_timeout_' ) . '%',
 				time()
 			)
 		);
 	}
 }
 
 /**
  * Saves and restores user interface settings stored in a cookie.
  *
  * Checks if the current user-settings cookie is updated and stores it. When no
  * cookie exists (different browser used), adds the last saved cookie restoring
  * the settings.
  *
  * @since 2.7.0
  */
 function wp_user_settings() {
 
 	if ( ! is_admin() || wp_doing_ajax() ) {
 		return;
 	}
 
 	$user_id = get_current_user_id();
 	if ( ! $user_id ) {
 		return;
 	}
 
 	if ( ! is_user_member_of_blog() ) {
 		return;
 	}
 
 	$settings = (string) get_user_option( 'user-settings', $user_id );
 
 	if ( isset( $_COOKIE[ 'wp-settings-' . $user_id ] ) ) {
 		$cookie = preg_replace( '/[^A-Za-z0-9=&_]/', '', $_COOKIE[ 'wp-settings-' . $user_id ] );
 
 		// No change or both empty.
 		if ( $cookie == $settings ) {
 			return;
 		}
 
 		$last_saved = (int) get_user_option( 'user-settings-time', $user_id );
 		$current    = isset( $_COOKIE[ 'wp-settings-time-' . $user_id ] ) ? preg_replace( '/[^0-9]/', '', $_COOKIE[ 'wp-settings-time-' . $user_id ] ) : 0;
 
 		// The cookie is newer than the saved value. Update the user_option and leave the cookie as-is.
 		if ( $current > $last_saved ) {
 			update_user_option( $user_id, 'user-settings', $cookie, false );
 			update_user_option( $user_id, 'user-settings-time', time() - 5, false );
 			return;
 		}
 	}
 
 	// The cookie is not set in the current browser or the saved value is newer.
 	$secure = ( 'https' === parse_url( admin_url(), PHP_URL_SCHEME ) );
 	setcookie( 'wp-settings-' . $user_id, $settings, time() + YEAR_IN_SECONDS, SITECOOKIEPATH, null, $secure );
 	setcookie( 'wp-settings-time-' . $user_id, time(), time() + YEAR_IN_SECONDS, SITECOOKIEPATH, null, $secure );
 	$_COOKIE[ 'wp-settings-' . $user_id ] = $settings;
 }
 
 /**
  * Retrieves user interface setting value based on setting name.
  *
  * @since 2.7.0
  *
  * @param string       $name    The name of the setting.
  * @param string|false $default Optional. Default value to return when $name is not set. Default false.
  * @return mixed The last saved user setting or the default value/false if it doesn't exist.
  */
 function get_user_setting( $name, $default = false ) {
 	$all_user_settings = get_all_user_settings();
 
 	return isset( $all_user_settings[ $name ] ) ? $all_user_settings[ $name ] : $default;
 }
 
 /**
  * Adds or updates user interface setting.
  *
  * Both $name and $value can contain only ASCII letters, numbers, hyphens, and underscores.
  *
  * This function has to be used before any output has started as it calls setcookie().
  *
  * @since 2.8.0
  *
  * @param string $name  The name of the setting.
  * @param string $value The value for the setting.
  * @return bool|null True if set successfully, false otherwise.
  *                   Null if the current user is not a member of the site.
  */
 function set_user_setting( $name, $value ) {
 	if ( headers_sent() ) {
 		return false;
 	}
 
 	$all_user_settings          = get_all_user_settings();
 	$all_user_settings[ $name ] = $value;
 
 	return wp_set_all_user_settings( $all_user_settings );
 }
 
 /**
  * Deletes user interface settings.
  *
  * Deleting settings would reset them to the defaults.
  *
  * This function has to be used before any output has started as it calls setcookie().
  *
  * @since 2.7.0
  *
  * @param string $names The name or array of names of the setting to be deleted.
  * @return bool|null True if deleted successfully, false otherwise.
  *                   Null if the current user is not a member of the site.
  */
 function delete_user_setting( $names ) {
 	if ( headers_sent() ) {
 		return false;
 	}
 
 	$all_user_settings = get_all_user_settings();
 	$names             = (array) $names;
 	$deleted           = false;
 
 	foreach ( $names as $name ) {
 		if ( isset( $all_user_settings[ $name ] ) ) {
 			unset( $all_user_settings[ $name ] );
 			$deleted = true;
 		}
 	}
 
 	if ( $deleted ) {
 		return wp_set_all_user_settings( $all_user_settings );
 	}
 
 	return false;
 }
 
 /**
  * Retrieves all user interface settings.
  *
  * @since 2.7.0
  *
  * @global array $_updated_user_settings
  *
  * @return array The last saved user settings or empty array.
  */
 function get_all_user_settings() {
 	global $_updated_user_settings;
 
 	$user_id = get_current_user_id();
 	if ( ! $user_id ) {
 		return array();
 	}
 
 	if ( isset( $_updated_user_settings ) && is_array( $_updated_user_settings ) ) {
 		return $_updated_user_settings;
 	}
 
 	$user_settings = array();
 
 	if ( isset( $_COOKIE[ 'wp-settings-' . $user_id ] ) ) {
 		$cookie = preg_replace( '/[^A-Za-z0-9=&_-]/', '', $_COOKIE[ 'wp-settings-' . $user_id ] );
 
 		if ( strpos( $cookie, '=' ) ) { // '=' cannot be 1st char.
 			parse_str( $cookie, $user_settings );
 		}
 	} else {
 		$option = get_user_option( 'user-settings', $user_id );
 
 		if ( $option && is_string( $option ) ) {
 			parse_str( $option, $user_settings );
 		}
 	}
 
 	$_updated_user_settings = $user_settings;
 	return $user_settings;
 }
 
 /**
  * Private. Sets all user interface settings.
  *
  * @since 2.8.0
  * @access private
  *
  * @global array $_updated_user_settings
  *
  * @param array $user_settings User settings.
  * @return bool|null True if set successfully, false if the current user could not be found.
  *                   Null if the current user is not a member of the site.
  */
 function wp_set_all_user_settings( $user_settings ) {
 	global $_updated_user_settings;
 
 	$user_id = get_current_user_id();
 	if ( ! $user_id ) {
 		return false;
 	}
 
 	if ( ! is_user_member_of_blog() ) {
 		return;
 	}
 
 	$settings = '';
 	foreach ( $user_settings as $name => $value ) {
 		$_name  = preg_replace( '/[^A-Za-z0-9_-]+/', '', $name );
 		$_value = preg_replace( '/[^A-Za-z0-9_-]+/', '', $value );
 
 		if ( ! empty( $_name ) ) {
 			$settings .= $_name . '=' . $_value . '&';
 		}
 	}
 
 	$settings = rtrim( $settings, '&' );
 	parse_str( $settings, $_updated_user_settings );
 
 	update_user_option( $user_id, 'user-settings', $settings, false );
 	update_user_option( $user_id, 'user-settings-time', time(), false );
 
 	return true;
 }
 
 /**
  * Deletes the user settings of the current user.
  *
  * @since 2.7.0
  */
 function delete_all_user_settings() {
 	$user_id = get_current_user_id();
 	if ( ! $user_id ) {
 		return;
 	}
 
 	update_user_option( $user_id, 'user-settings', '', false );
 	setcookie( 'wp-settings-' . $user_id, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH );
 }
 
 /**
  * Retrieve an option value for the current network based on name of option.
  *
  * @since 2.8.0
  * @since 4.4.0 The `$use_cache` parameter was deprecated.
  * @since 4.4.0 Modified into wrapper for get_network_option()
  *
  * @see get_network_option()
  *
  * @param string $option     Name of the option to retrieve. Expected to not be SQL-escaped.
  * @param mixed  $default    Optional. Value to return if the option doesn't exist. Default false.
  * @param bool   $deprecated Whether to use cache. Multisite only. Always set to true.
  * @return mixed Value set for the option.
  */
 function get_site_option( $option, $default = false, $deprecated = true ) {
 	return get_network_option( null, $option, $default );
 }
 
 /**
  * Adds a new option for the current network.
  *
  * Existing options will not be updated. Note that prior to 3.3 this wasn't the case.
  *
  * @since 2.8.0
  * @since 4.4.0 Modified into wrapper for add_network_option()
  *
  * @see add_network_option()
  *
  * @param string $option Name of the option to add. Expected to not be SQL-escaped.
  * @param mixed  $value  Option value, can be anything. Expected to not be SQL-escaped.
  * @return bool True if the option was added, false otherwise.
  */
 function add_site_option( $option, $value ) {
 	return add_network_option( null, $option, $value );
 }
 
 /**
  * Removes a option by name for the current network.
  *
  * @since 2.8.0
  * @since 4.4.0 Modified into wrapper for delete_network_option()
  *
  * @see delete_network_option()
  *
  * @param string $option Name of the option to delete. Expected to not be SQL-escaped.
  * @return bool True if the option was deleted, false otherwise.
  */
 function delete_site_option( $option ) {
 	return delete_network_option( null, $option );
 }
 
 /**
  * Updates the value of an option that was already added for the current network.
  *
  * @since 2.8.0
  * @since 4.4.0 Modified into wrapper for update_network_option()
  *
  * @see update_network_option()
  *
  * @param string $option Name of the option. Expected to not be SQL-escaped.
  * @param mixed  $value  Option value. Expected to not be SQL-escaped.
  * @return bool True if the value was updated, false otherwise.
  */
 function update_site_option( $option, $value ) {
 	return update_network_option( null, $option, $value );
 }
 
 /**
  * Retrieves a network's option value based on the option name.
  *
  * @since 4.4.0
  *
  * @see get_option()
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param int    $network_id ID of the network. Can be null to default to the current network ID.
  * @param string $option     Name of the option to retrieve. Expected to not be SQL-escaped.
  * @param mixed  $default    Optional. Value to return if the option doesn't exist. Default false.
  * @return mixed Value set for the option.
  */
 function get_network_option( $network_id, $option, $default = false ) {
 	global $wpdb;
 
 	if ( $network_id && ! is_numeric( $network_id ) ) {
 		return false;
 	}
 
 	$network_id = (int) $network_id;
 
 	// Fallback to the current network if a network ID is not specified.
 	if ( ! $network_id ) {
 		$network_id = get_current_network_id();
 	}
 
 	/**
 	 * Filters the value of an existing network option before it is retrieved.
 	 *
 	 * The dynamic portion of the hook name, `$option`, refers to the option name.
 	 *
 	 * Returning a truthy value from the filter will effectively short-circuit retrieval
 	 * and return the passed value instead.
 	 *
 	 * @since 2.9.0 As 'pre_site_option_' . $key
 	 * @since 3.0.0
 	 * @since 4.4.0 The `$option` parameter was added.
 	 * @since 4.7.0 The `$network_id` parameter was added.
 	 * @since 4.9.0 The `$default` parameter was added.
 	 *
 	 * @param mixed  $pre_option The value to return instead of the option value. This differs
 	 *                           from `$default`, which is used as the fallback value in the event
 	 *                           the option doesn't exist elsewhere in get_network_option().
 	 *                           Default false (to skip past the short-circuit).
 	 * @param string $option     Option name.
 	 * @param int    $network_id ID of the network.
 	 * @param mixed  $default    The fallback value to return if the option does not exist.
 	 *                           Default false.
 	 */
 	$pre = apply_filters( "pre_site_option_{$option}", false, $option, $network_id, $default );
 
 	if ( false !== $pre ) {
 		return $pre;
 	}
 
 	// Prevent non-existent options from triggering multiple queries.
 	$notoptions_key = "$network_id:notoptions";
 	$notoptions     = wp_cache_get( $notoptions_key, 'site-options' );
 
 	if ( is_array( $notoptions ) && isset( $notoptions[ $option ] ) ) {
 
 		/**
 		 * Filters a specific default network option.
 		 *
 		 * The dynamic portion of the hook name, `$option`, refers to the option name.
 		 *
 		 * @since 3.4.0
 		 * @since 4.4.0 The `$option` parameter was added.
 		 * @since 4.7.0 The `$network_id` parameter was added.
 		 *
 		 * @param mixed  $default    The value to return if the site option does not exist
 		 *                           in the database.
 		 * @param string $option     Option name.
 		 * @param int    $network_id ID of the network.
 		 */
 		return apply_filters( "default_site_option_{$option}", $default, $option, $network_id );
 	}
 
 	if ( ! is_multisite() ) {
 		/** This filter is documented in wp-includes/option.php */
 		$default = apply_filters( 'default_site_option_' . $option, $default, $option, $network_id );
 		$value   = get_option( $option, $default );
 	} else {
 		$cache_key = "$network_id:$option";
 		$value     = wp_cache_get( $cache_key, 'site-options' );
 
 		if ( ! isset( $value ) || false === $value ) {
 			$row = $wpdb->get_row( $wpdb->prepare( "SELECT meta_value FROM $wpdb->sitemeta WHERE meta_key = %s AND site_id = %d", $option, $network_id ) );
 
 			// Has to be get_row() instead of get_var() because of funkiness with 0, false, null values.
 			if ( is_object( $row ) ) {
 				$value = $row->meta_value;
 				$value = maybe_unserialize( $value );
 				wp_cache_set( $cache_key, $value, 'site-options' );
 			} else {
 				if ( ! is_array( $notoptions ) ) {
 					$notoptions = array();
 				}
 
 				$notoptions[ $option ] = true;
 				wp_cache_set( $notoptions_key, $notoptions, 'site-options' );
 
 				/** This filter is documented in wp-includes/option.php */
 				$value = apply_filters( 'default_site_option_' . $option, $default, $option, $network_id );
 			}
 		}
 	}
 
 	if ( ! is_array( $notoptions ) ) {
 		$notoptions = array();
 		wp_cache_set( $notoptions_key, $notoptions, 'site-options' );
 	}
 
 	/**
 	 * Filters the value of an existing network option.
 	 *
 	 * The dynamic portion of the hook name, `$option`, refers to the option name.
 	 *
 	 * @since 2.9.0 As 'site_option_' . $key
 	 * @since 3.0.0
 	 * @since 4.4.0 The `$option` parameter was added.
 	 * @since 4.7.0 The `$network_id` parameter was added.
 	 *
 	 * @param mixed  $value      Value of network option.
 	 * @param string $option     Option name.
 	 * @param int    $network_id ID of the network.
 	 */
 	return apply_filters( "site_option_{$option}", $value, $option, $network_id );
 }
 
 /**
  * Adds a new network option.
  *
  * Existing options will not be updated.
  *
  * @since 4.4.0
  *
  * @see add_option()
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param int    $network_id ID of the network. Can be null to default to the current network ID.
  * @param string $option     Name of the option to add. Expected to not be SQL-escaped.
  * @param mixed  $value      Option value, can be anything. Expected to not be SQL-escaped.
  * @return bool True if the option was added, false otherwise.
  */
 function add_network_option( $network_id, $option, $value ) {
 	global $wpdb;
 
 	if ( $network_id && ! is_numeric( $network_id ) ) {
 		return false;
 	}
 
 	$network_id = (int) $network_id;
 
 	// Fallback to the current network if a network ID is not specified.
 	if ( ! $network_id ) {
 		$network_id = get_current_network_id();
 	}
 
 	wp_protect_special_option( $option );
 
 	/**
 	 * Filters the value of a specific network option before it is added.
 	 *
 	 * The dynamic portion of the hook name, `$option`, refers to the option name.
 	 *
 	 * @since 2.9.0 As 'pre_add_site_option_' . $key
 	 * @since 3.0.0
 	 * @since 4.4.0 The `$option` parameter was added.
 	 * @since 4.7.0 The `$network_id` parameter was added.
 	 *
 	 * @param mixed  $value      Value of network option.
 	 * @param string $option     Option name.
 	 * @param int    $network_id ID of the network.
 	 */
 	$value = apply_filters( "pre_add_site_option_{$option}", $value, $option, $network_id );
 
 	$notoptions_key = "$network_id:notoptions";
 
 	if ( ! is_multisite() ) {
 		$result = add_option( $option, $value, '', 'no' );
 	} else {
 		$cache_key = "$network_id:$option";
 
 		// Make sure the option doesn't already exist.
 		// We can check the 'notoptions' cache before we ask for a DB query.
 		$notoptions = wp_cache_get( $notoptions_key, 'site-options' );
 
 		if ( ! is_array( $notoptions ) || ! isset( $notoptions[ $option ] ) ) {
 			if ( false !== get_network_option( $network_id, $option, false ) ) {
 				return false;
 			}
 		}
 
 		$value = sanitize_option( $option, $value );
 
 		$serialized_value = maybe_serialize( $value );
 		$result           = $wpdb->insert(
 			$wpdb->sitemeta,
 			array(
 				'site_id'    => $network_id,
 				'meta_key'   => $option,
 				'meta_value' => $serialized_value,
 			)
 		);
 
 		if ( ! $result ) {
 			return false;
 		}
 
 		wp_cache_set( $cache_key, $value, 'site-options' );
 
 		// This option exists now.
 		$notoptions = wp_cache_get( $notoptions_key, 'site-options' ); // Yes, again... we need it to be fresh.
 
 		if ( is_array( $notoptions ) && isset( $notoptions[ $option ] ) ) {
 			unset( $notoptions[ $option ] );
 			wp_cache_set( $notoptions_key, $notoptions, 'site-options' );
 		}
 	}
 
 	if ( $result ) {
 
 		/**
 		 * Fires after a specific network option has been successfully added.
 		 *
 		 * The dynamic portion of the hook name, `$option`, refers to the option name.
 		 *
 		 * @since 2.9.0 As "add_site_option_{$key}"
 		 * @since 3.0.0
 		 * @since 4.7.0 The `$network_id` parameter was added.
 		 *
 		 * @param string $option     Name of the network option.
 		 * @param mixed  $value      Value of the network option.
 		 * @param int    $network_id ID of the network.
 		 */
 		do_action( "add_site_option_{$option}", $option, $value, $network_id );
 
 		/**
 		 * Fires after a network option has been successfully added.
 		 *
 		 * @since 3.0.0
 		 * @since 4.7.0 The `$network_id` parameter was added.
 		 *
 		 * @param string $option     Name of the network option.
 		 * @param mixed  $value      Value of the network option.
 		 * @param int    $network_id ID of the network.
 		 */
 		do_action( 'add_site_option', $option, $value, $network_id );
 
 		return true;
 	}
 
 	return false;
 }
 
 /**
  * Removes a network option by name.
  *
  * @since 4.4.0
  *
  * @see delete_option()
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param int    $network_id ID of the network. Can be null to default to the current network ID.
  * @param string $option     Name of the option to delete. Expected to not be SQL-escaped.
  * @return bool True if the option was deleted, false otherwise.
  */
 function delete_network_option( $network_id, $option ) {
 	global $wpdb;
 
 	if ( $network_id && ! is_numeric( $network_id ) ) {
 		return false;
 	}
 
 	$network_id = (int) $network_id;
 
 	// Fallback to the current network if a network ID is not specified.
 	if ( ! $network_id ) {
 		$network_id = get_current_network_id();
 	}
 
 	/**
 	 * Fires immediately before a specific network option is deleted.
 	 *
 	 * The dynamic portion of the hook name, `$option`, refers to the option name.
 	 *
 	 * @since 3.0.0
 	 * @since 4.4.0 The `$option` parameter was added.
 	 * @since 4.7.0 The `$network_id` parameter was added.
 	 *
 	 * @param string $option     Option name.
 	 * @param int    $network_id ID of the network.
 	 */
 	do_action( "pre_delete_site_option_{$option}", $option, $network_id );
 
 	if ( ! is_multisite() ) {
 		$result = delete_option( $option );
 	} else {
 		$row = $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM {$wpdb->sitemeta} WHERE meta_key = %s AND site_id = %d", $option, $network_id ) );
 		if ( is_null( $row ) || ! $row->meta_id ) {
 			return false;
 		}
 		$cache_key = "$network_id:$option";
 		wp_cache_delete( $cache_key, 'site-options' );
 
 		$result = $wpdb->delete(
 			$wpdb->sitemeta,
 			array(
 				'meta_key' => $option,
 				'site_id'  => $network_id,
 			)
 		);
 	}
 
 	if ( $result ) {
 
 		/**
 		 * Fires after a specific network option has been deleted.
 		 *
 		 * The dynamic portion of the hook name, `$option`, refers to the option name.
 		 *
 		 * @since 2.9.0 As "delete_site_option_{$key}"
 		 * @since 3.0.0
 		 * @since 4.7.0 The `$network_id` parameter was added.
 		 *
 		 * @param string $option     Name of the network option.
 		 * @param int    $network_id ID of the network.
 		 */
 		do_action( "delete_site_option_{$option}", $option, $network_id );
 
 		/**
 		 * Fires after a network option has been deleted.
 		 *
 		 * @since 3.0.0
 		 * @since 4.7.0 The `$network_id` parameter was added.
 		 *
 		 * @param string $option     Name of the network option.
 		 * @param int    $network_id ID of the network.
 		 */
 		do_action( 'delete_site_option', $option, $network_id );
 
 		return true;
 	}
 
 	return false;
 }
 
 /**
  * Updates the value of a network option that was already added.
  *
  * @since 4.4.0
  *
  * @see update_option()
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param int    $network_id ID of the network. Can be null to default to the current network ID.
  * @param string $option     Name of the option. Expected to not be SQL-escaped.
  * @param mixed  $value      Option value. Expected to not be SQL-escaped.
  * @return bool True if the value was updated, false otherwise.
  */
 function update_network_option( $network_id, $option, $value ) {
 	global $wpdb;
 
 	if ( $network_id && ! is_numeric( $network_id ) ) {
 		return false;
 	}
 
 	$network_id = (int) $network_id;
 
 	// Fallback to the current network if a network ID is not specified.
 	if ( ! $network_id ) {
 		$network_id = get_current_network_id();
 	}
 
 	wp_protect_special_option( $option );
 
 	$old_value = get_network_option( $network_id, $option, false );
 
 	/**
 	 * Filters a specific network option before its value is updated.
 	 *
 	 * The dynamic portion of the hook name, `$option`, refers to the option name.
 	 *
 	 * @since 2.9.0 As 'pre_update_site_option_' . $key
 	 * @since 3.0.0
 	 * @since 4.4.0 The `$option` parameter was added.
 	 * @since 4.7.0 The `$network_id` parameter was added.
 	 *
 	 * @param mixed  $value      New value of the network option.
 	 * @param mixed  $old_value  Old value of the network option.
 	 * @param string $option     Option name.
 	 * @param int    $network_id ID of the network.
 	 */
 	$value = apply_filters( "pre_update_site_option_{$option}", $value, $old_value, $option, $network_id );
 
 	/*
 	 * If the new and old values are the same, no need to update.
 	 *
 	 * Unserialized values will be adequate in most cases. If the unserialized
 	 * data differs, the (maybe) serialized data is checked to avoid
 	 * unnecessary database calls for otherwise identical object instances.
 	 *
 	 * See https://core.trac.wordpress.org/ticket/44956
 	 */
 	if ( $value === $old_value || maybe_serialize( $value ) === maybe_serialize( $old_value ) ) {
 		return false;
 	}
 
 	if ( false === $old_value ) {
 		return add_network_option( $network_id, $option, $value );
 	}
 
 	$notoptions_key = "$network_id:notoptions";
 	$notoptions     = wp_cache_get( $notoptions_key, 'site-options' );
 
 	if ( is_array( $notoptions ) && isset( $notoptions[ $option ] ) ) {
 		unset( $notoptions[ $option ] );
 		wp_cache_set( $notoptions_key, $notoptions, 'site-options' );
 	}
 
 	if ( ! is_multisite() ) {
 		$result = update_option( $option, $value, 'no' );
 	} else {
 		$value = sanitize_option( $option, $value );
 
 		$serialized_value = maybe_serialize( $value );
 		$result           = $wpdb->update(
 			$wpdb->sitemeta,
 			array( 'meta_value' => $serialized_value ),
 			array(
 				'site_id'  => $network_id,
 				'meta_key' => $option,
 			)
 		);
 
 		if ( $result ) {
 			$cache_key = "$network_id:$option";
 			wp_cache_set( $cache_key, $value, 'site-options' );
 		}
 	}
 
 	if ( $result ) {
 
 		/**
 		 * Fires after the value of a specific network option has been successfully updated.
 		 *
 		 * The dynamic portion of the hook name, `$option`, refers to the option name.
 		 *
 		 * @since 2.9.0 As "update_site_option_{$key}"
 		 * @since 3.0.0
 		 * @since 4.7.0 The `$network_id` parameter was added.
 		 *
 		 * @param string $option     Name of the network option.
 		 * @param mixed  $value      Current value of the network option.
 		 * @param mixed  $old_value  Old value of the network option.
 		 * @param int    $network_id ID of the network.
 		 */
 		do_action( "update_site_option_{$option}", $option, $value, $old_value, $network_id );
 
 		/**
 		 * Fires after the value of a network option has been successfully updated.
 		 *
 		 * @since 3.0.0
 		 * @since 4.7.0 The `$network_id` parameter was added.
 		 *
 		 * @param string $option     Name of the network option.
 		 * @param mixed  $value      Current value of the network option.
 		 * @param mixed  $old_value  Old value of the network option.
 		 * @param int    $network_id ID of the network.
 		 */
 		do_action( 'update_site_option', $option, $value, $old_value, $network_id );
 
 		return true;
 	}
 
 	return false;
 }
 
 /**
  * Deletes a site transient.
  *
  * @since 2.9.0
  *
  * @param string $transient Transient name. Expected to not be SQL-escaped.
  * @return bool True if the transient was deleted, false otherwise.
  */
 function delete_site_transient( $transient ) {
 
 	/**
 	 * Fires immediately before a specific site transient is deleted.
 	 *
 	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
 	 *
 	 * @since 3.0.0
 	 *
 	 * @param string $transient Transient name.
 	 */
 	do_action( "delete_site_transient_{$transient}", $transient );
 
 	if ( wp_using_ext_object_cache() ) {
 		$result = wp_cache_delete( $transient, 'site-transient' );
 	} else {
 		$option_timeout = '_site_transient_timeout_' . $transient;
 		$option         = '_site_transient_' . $transient;
 		$result         = delete_site_option( $option );
 
 		if ( $result ) {
 			delete_site_option( $option_timeout );
 		}
 	}
 
 	if ( $result ) {
 
 		/**
 		 * Fires after a transient is deleted.
 		 *
 		 * @since 3.0.0
 		 *
 		 * @param string $transient Deleted transient name.
 		 */
 		do_action( 'deleted_site_transient', $transient );
 	}
 
 	return $result;
 }
 
 /**
  * Retrieves the value of a site transient.
  *
  * If the transient does not exist, does not have a value, or has expired,
  * then the return value will be false.
  *
  * @since 2.9.0
  *
  * @see get_transient()
  *
  * @param string $transient Transient name. Expected to not be SQL-escaped.
  * @return mixed Value of transient.
  */
 function get_site_transient( $transient ) {
 
 	/**
 	 * Filters the value of an existing site transient before it is retrieved.
 	 *
 	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
 	 *
 	 * Returning a truthy value from the filter will effectively short-circuit retrieval
 	 * and return the passed value instead.
 	 *
 	 * @since 2.9.0
 	 * @since 4.4.0 The `$transient` parameter was added.
 	 *
 	 * @param mixed  $pre_site_transient The default value to return if the site transient does not exist.
 	 *                                   Any value other than false will short-circuit the retrieval
 	 *                                   of the transient, and return that value.
 	 * @param string $transient          Transient name.
 	 */
 	$pre = apply_filters( "pre_site_transient_{$transient}", false, $transient );
 
 	if ( false !== $pre ) {
 		return $pre;
 	}
 
 	if ( wp_using_ext_object_cache() ) {
 		$value = wp_cache_get( $transient, 'site-transient' );
 	} else {
 		// Core transients that do not have a timeout. Listed here so querying timeouts can be avoided.
 		$no_timeout       = array( 'update_core', 'update_plugins', 'update_themes' );
 		$transient_option = '_site_transient_' . $transient;
 		if ( ! in_array( $transient, $no_timeout, true ) ) {
 			$transient_timeout = '_site_transient_timeout_' . $transient;
 			$timeout           = get_site_option( $transient_timeout );
 			if ( false !== $timeout && $timeout < time() ) {
 				delete_site_option( $transient_option );
 				delete_site_option( $transient_timeout );
 				$value = false;
 			}
 		}
 
 		if ( ! isset( $value ) ) {
 			$value = get_site_option( $transient_option );
 		}
 	}
 
 	/**
 	 * Filters the value of an existing site transient.
 	 *
 	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
 	 *
 	 * @since 2.9.0
 	 * @since 4.4.0 The `$transient` parameter was added.
 	 *
 	 * @param mixed  $value     Value of site transient.
 	 * @param string $transient Transient name.
 	 */
 	return apply_filters( "site_transient_{$transient}", $value, $transient );
 }
 
 /**
  * Sets/updates the value of a site transient.
  *
  * You do not need to serialize values. If the value needs to be serialized,
  * then it will be serialized before it is set.
  *
  * @since 2.9.0
  *
  * @see set_transient()
  *
  * @param string $transient  Transient name. Expected to not be SQL-escaped. Must be
  *                           167 characters or fewer in length.
  * @param mixed  $value      Transient value. Expected to not be SQL-escaped.
  * @param int    $expiration Optional. Time until expiration in seconds. Default 0 (no expiration).
  * @return bool True if the value was set, false otherwise.
  */
 function set_site_transient( $transient, $value, $expiration = 0 ) {
 
 	/**
 	 * Filters the value of a specific site transient before it is set.
 	 *
 	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
 	 *
 	 * @since 3.0.0
 	 * @since 4.4.0 The `$transient` parameter was added.
 	 *
 	 * @param mixed  $value     New value of site transient.
 	 * @param string $transient Transient name.
 	 */
 	$value = apply_filters( "pre_set_site_transient_{$transient}", $value, $transient );
 
 	$expiration = (int) $expiration;
 
 	/**
 	 * Filters the expiration for a site transient before its value is set.
 	 *
 	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
 	 *
 	 * @since 4.4.0
 	 *
 	 * @param int    $expiration Time until expiration in seconds. Use 0 for no expiration.
 	 * @param mixed  $value      New value of site transient.
 	 * @param string $transient  Transient name.
 	 */
 	$expiration = apply_filters( "expiration_of_site_transient_{$transient}", $expiration, $value, $transient );
 
 	if ( wp_using_ext_object_cache() ) {
 		$result = wp_cache_set( $transient, $value, 'site-transient', $expiration );
 	} else {
 		$transient_timeout = '_site_transient_timeout_' . $transient;
 		$option            = '_site_transient_' . $transient;
 
 		if ( false === get_site_option( $option ) ) {
 			if ( $expiration ) {
 				add_site_option( $transient_timeout, time() + $expiration );
 			}
 			$result = add_site_option( $option, $value );
 		} else {
 			if ( $expiration ) {
 				update_site_option( $transient_timeout, time() + $expiration );
 			}
 			$result = update_site_option( $option, $value );
 		}
 	}
 
 	if ( $result ) {
 
 		/**
 		 * Fires after the value for a specific site transient has been set.
 		 *
 		 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
 		 *
 		 * @since 3.0.0
 		 * @since 4.4.0 The `$transient` parameter was added
 		 *
 		 * @param mixed  $value      Site transient value.
 		 * @param int    $expiration Time until expiration in seconds.
 		 * @param string $transient  Transient name.
 		 */
 		do_action( "set_site_transient_{$transient}", $value, $expiration, $transient );
 
 		/**
 		 * Fires after the value for a site transient has been set.
 		 *
 		 * @since 3.0.0
 		 *
 		 * @param string $transient  The name of the site transient.
 		 * @param mixed  $value      Site transient value.
 		 * @param int    $expiration Time until expiration in seconds.
 		 */
 		do_action( 'setted_site_transient', $transient, $value, $expiration );
 	}
 
 	return $result;
 }
 
 /**
  * Registers default settings available in WordPress.
  *
  * The settings registered here are primarily useful for the REST API, so this
  * does not encompass all settings available in WordPress.
  *
  * @since 4.7.0
  */
 function register_initial_settings() {
 	register_setting(
 		'general',
 		'blogname',
 		array(
 			'show_in_rest' => array(
 				'name' => 'title',
 			),
 			'type'         => 'string',
 			'description'  => __( 'Site title.' ),
 		)
 	);
 
 	register_setting(
 		'general',
 		'blogdescription',
 		array(
 			'show_in_rest' => array(
 				'name' => 'description',
 			),
 			'type'         => 'string',
 			'description'  => __( 'Site tagline.' ),
 		)
 	);
 
 	if ( ! is_multisite() ) {
 		register_setting(
 			'general',
 			'siteurl',
 			array(
 				'show_in_rest' => array(
 					'name'   => 'url',
 					'schema' => array(
 						'format' => 'uri',
 					),
 				),
 				'type'         => 'string',
 				'description'  => __( 'Site URL.' ),
 			)
 		);
 	}
 
 	if ( ! is_multisite() ) {
 		register_setting(
 			'general',
 			'admin_email',
 			array(
 				'show_in_rest' => array(
 					'name'   => 'email',
 					'schema' => array(
 						'format' => 'email',
 					),
 				),
 				'type'         => 'string',
 				'description'  => __( 'This address is used for admin purposes, like new user notification.' ),
 			)
 		);
 	}
 
 	register_setting(
 		'general',
 		'timezone_string',
 		array(
 			'show_in_rest' => array(
 				'name' => 'timezone',
 			),
 			'type'         => 'string',
 			'description'  => __( 'A city in the same timezone as you.' ),
 		)
 	);
 
 	register_setting(
 		'general',
 		'date_format',
 		array(
 			'show_in_rest' => true,
 			'type'         => 'string',
 			'description'  => __( 'A date format for all date strings.' ),
 		)
 	);
 
 	register_setting(
 		'general',
 		'time_format',
 		array(
 			'show_in_rest' => true,
 			'type'         => 'string',
 			'description'  => __( 'A time format for all time strings.' ),
 		)
 	);
 
 	register_setting(
 		'general',
 		'start_of_week',
 		array(
 			'show_in_rest' => true,
 			'type'         => 'integer',
 			'description'  => __( 'A day number of the week that the week should start on.' ),
 		)
 	);
 
 	register_setting(
 		'general',
 		'WPLANG',
 		array(
 			'show_in_rest' => array(
 				'name' => 'language',
 			),
 			'type'         => 'string',
 			'description'  => __( 'WordPress locale code.' ),
 			'default'      => 'en_US',
 		)
 	);
 
 	register_setting(
 		'writing',
 		'use_smilies',
 		array(
 			'show_in_rest' => true,
 			'type'         => 'boolean',
 			'description'  => __( 'Convert emoticons like :-) and :-P to graphics on display.' ),
 			'default'      => true,
 		)
 	);
 
 	register_setting(
 		'writing',
 		'default_category',
 		array(
 			'show_in_rest' => true,
 			'type'         => 'integer',
 			'description'  => __( 'Default post category.' ),
 		)
 	);
 
 	register_setting(
 		'writing',
 		'default_post_format',
 		array(
 			'show_in_rest' => true,
 			'type'         => 'string',
 			'description'  => __( 'Default post format.' ),
 		)
 	);
 
 	register_setting(
 		'reading',
 		'posts_per_page',
 		array(
 			'show_in_rest' => true,
 			'type'         => 'integer',
 			'description'  => __( 'Blog pages show at most.' ),
 			'default'      => 10,
 		)
 	);
 
 	register_setting(
 		'discussion',
 		'default_ping_status',
 		array(
 			'show_in_rest' => array(
 				'schema' => array(
 					'enum' => array( 'open', 'closed' ),
 				),
 			),
 			'type'         => 'string',
 			'description'  => __( 'Allow link notifications from other blogs (pingbacks and trackbacks) on new articles.' ),
 		)
 	);
 
 	register_setting(
 		'discussion',
 		'default_comment_status',
 		array(
 			'show_in_rest' => array(
 				'schema' => array(
 					'enum' => array( 'open', 'closed' ),
 				),
 			),
 			'type'         => 'string',
 			'description'  => __( 'Allow people to submit comments on new posts.' ),
 		)
 	);
 }
 
 /**
  * Registers a setting and its data.
  *
  * @since 2.7.0
  * @since 4.7.0 `$args` can be passed to set flags on the setting, similar to `register_meta()`.
  * @since 5.5.0 `$new_whitelist_options` was renamed to `$new_allowed_options`.
  *              Please consider writing more inclusive code.
  *
  * @global array $new_allowed_options
  * @global array $wp_registered_settings
  *
  * @param string $option_group A settings group name. Should correspond to an allowed option key name.
  *                             Default allowed option key names include 'general', 'discussion', 'media',
  *                             'reading', 'writing', 'misc', 'options', and 'privacy'.
  * @param string $option_name The name of an option to sanitize and save.
  * @param array  $args {
  *     Data used to describe the setting when registered.
  *
  *     @type string     $type              The type of data associated with this setting.
  *                                         Valid values are 'string', 'boolean', 'integer', 'number', 'array', and 'object'.
  *     @type string     $description       A description of the data attached to this setting.
  *     @type callable   $sanitize_callback A callback function that sanitizes the option's value.
  *     @type bool|array $show_in_rest      Whether data associated with this setting should be included in the REST API.
  *                                         When registering complex settings, this argument may optionally be an
  *                                         array with a 'schema' key.
  *     @type mixed      $default           Default value when calling `get_option()`.
  * }
  */
 function register_setting( $option_group, $option_name, $args = array() ) {
 	global $new_allowed_options, $wp_registered_settings;
 
 	/*
 	 * In 5.5.0, the `$new_whitelist_options` global variable was renamed to `$new_allowed_options`.
 	 * Please consider writing more inclusive code.
 	 */
 	$GLOBALS['new_whitelist_options'] = &$new_allowed_options;
 
 	$defaults = array(
 		'type'              => 'string',
 		'group'             => $option_group,
 		'description'       => '',
 		'sanitize_callback' => null,
 		'show_in_rest'      => false,
 	);
 
 	// Back-compat: old sanitize callback is added.
 	if ( is_callable( $args ) ) {
 		$args = array(
 			'sanitize_callback' => $args,
 		);
 	}
 
 	/**
 	 * Filters the registration arguments when registering a setting.
 	 *
 	 * @since 4.7.0
 	 *
 	 * @param array  $args         Array of setting registration arguments.
 	 * @param array  $defaults     Array of default arguments.
 	 * @param string $option_group Setting group.
 	 * @param string $option_name  Setting name.
 	 */
 	$args = apply_filters( 'register_setting_args', $args, $defaults, $option_group, $option_name );
 
 	$args = wp_parse_args( $args, $defaults );
 
 	// Require an item schema when registering settings with an array type.
 	if ( false !== $args['show_in_rest'] && 'array' === $args['type'] && ( ! is_array( $args['show_in_rest'] ) || ! isset( $args['show_in_rest']['schema']['items'] ) ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'When registering an "array" setting to show in the REST API, you must specify the schema for each array item in "show_in_rest.schema.items".' ), '5.4.0' );
 	}
 
 	if ( ! is_array( $wp_registered_settings ) ) {
 		$wp_registered_settings = array();
 	}
 
 	if ( 'misc' === $option_group ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'3.0.0',
 			sprintf(
 				/* translators: %s: misc */
 				__( 'The "%s" options group has been removed. Use another settings group.' ),
 				'misc'
 			)
 		);
 		$option_group = 'general';
 	}
 
 	if ( 'privacy' === $option_group ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'3.5.0',
 			sprintf(
 				/* translators: %s: privacy */
 				__( 'The "%s" options group has been removed. Use another settings group.' ),
 				'privacy'
 			)
 		);
 		$option_group = 'reading';
 	}
 
 	$new_allowed_options[ $option_group ][] = $option_name;
 
 	if ( ! empty( $args['sanitize_callback'] ) ) {
 		add_filter( "sanitize_option_{$option_name}", $args['sanitize_callback'] );
 	}
 	if ( array_key_exists( 'default', $args ) ) {
 		add_filter( "default_option_{$option_name}", 'filter_default_option', 10, 3 );
 	}
 
 	/**
 	 * Fires immediately before the setting is registered but after its filters are in place.
 	 *
 	 * @since 5.5.0
 	 *
 	 * @param string $option_group Setting group.
 	 * @param string $option_name  Setting name.
 	 * @param array  $args         Array of setting registration arguments.
 	 */
 	do_action( 'register_setting', $option_group, $option_name, $args );
 
 	$wp_registered_settings[ $option_name ] = $args;
 }
 
 /**
  * Unregisters a setting.
  *
  * @since 2.7.0
  * @since 4.7.0 `$sanitize_callback` was deprecated. The callback from `register_setting()` is now used instead.
  * @since 5.5.0 `$new_whitelist_options` was renamed to `$new_allowed_options`.
  *              Please consider writing more inclusive code.
  *
  * @global array $new_allowed_options
  * @global array $wp_registered_settings
  *
  * @param string          $option_group The settings group name used during registration.
  * @param string          $option_name  The name of the option to unregister.
  * @param callable|string $deprecated   Deprecated.
  */
 function unregister_setting( $option_group, $option_name, $deprecated = '' ) {
 	global $new_allowed_options, $wp_registered_settings;
 
 	/*
 	 * In 5.5.0, the `$new_whitelist_options` global variable was renamed to `$new_allowed_options`.
 	 * Please consider writing more inclusive code.
 	 */
 	$GLOBALS['new_whitelist_options'] = &$new_allowed_options;
 
 	if ( 'misc' === $option_group ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'3.0.0',
 			sprintf(
 				/* translators: %s: misc */
 				__( 'The "%s" options group has been removed. Use another settings group.' ),
 				'misc'
 			)
 		);
 		$option_group = 'general';
 	}
 
 	if ( 'privacy' === $option_group ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'3.5.0',
 			sprintf(
 				/* translators: %s: privacy */
 				__( 'The "%s" options group has been removed. Use another settings group.' ),
 				'privacy'
 			)
 		);
 		$option_group = 'reading';
 	}
 
 	$pos = array_search( $option_name, (array) $new_allowed_options[ $option_group ], true );
 
 	if ( false !== $pos ) {
 		unset( $new_allowed_options[ $option_group ][ $pos ] );
 	}
 
 	if ( '' !== $deprecated ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'4.7.0',
 			sprintf(
 				/* translators: 1: $sanitize_callback, 2: register_setting() */
 				__( '%1$s is deprecated. The callback from %2$s is used instead.' ),
 				'<code>$sanitize_callback</code>',
 				'<code>register_setting()</code>'
 			)
 		);
 		remove_filter( "sanitize_option_{$option_name}", $deprecated );
 	}
 
 	if ( isset( $wp_registered_settings[ $option_name ] ) ) {
 		// Remove the sanitize callback if one was set during registration.
 		if ( ! empty( $wp_registered_settings[ $option_name ]['sanitize_callback'] ) ) {
 			remove_filter( "sanitize_option_{$option_name}", $wp_registered_settings[ $option_name ]['sanitize_callback'] );
 		}
 
 		// Remove the default filter if a default was provided during registration.
 		if ( array_key_exists( 'default', $wp_registered_settings[ $option_name ] ) ) {
 			remove_filter( "default_option_{$option_name}", 'filter_default_option', 10 );
 		}
 
 		/**
 		 * Fires immediately before the setting is unregistered and after its filters have been removed.
 		 *
 		 * @since 5.5.0
 		 *
 		 * @param string $option_group Setting group.
 		 * @param string $option_name  Setting name.
 		 */
 		do_action( 'unregister_setting', $option_group, $option_name );
 
 		unset( $wp_registered_settings[ $option_name ] );
 	}
 }
 
 /**
  * Retrieves an array of registered settings.
  *
  * @since 4.7.0
  *
  * @global array $wp_registered_settings
  *
  * @return array List of registered settings, keyed by option name.
  */
 function get_registered_settings() {
 	global $wp_registered_settings;
 
 	if ( ! is_array( $wp_registered_settings ) ) {
 		return array();
 	}
 
 	return $wp_registered_settings;
 }
 
 /**
  * Filters the default value for the option.
  *
  * For settings which register a default setting in `register_setting()`, this
  * function is added as a filter to `default_option_{$option}`.
  *
  * @since 4.7.0
  *
  * @param mixed  $default        Existing default value to return.
  * @param string $option         Option name.
  * @param bool   $passed_default Was `get_option()` passed a default value?
  * @return mixed Filtered default value.
  */
 function filter_default_option( $default, $option, $passed_default ) {
 	if ( $passed_default ) {
 		return $default;
 	}
 
 	$registered = get_registered_settings();
 	if ( empty( $registered[ $option ] ) ) {
 		return $default;
 	}
 
 	return $registered[ $option ]['default'];
 }