ru-se.com

query.php (35783B)

---

 <?php
 /**
  * WordPress Query API
  *
  * The query API attempts to get which part of WordPress the user is on. It
  * also provides functionality for getting URL query information.
  *
  * @link https://developer.wordpress.org/themes/basics/the-loop/ More information on The Loop.
  *
  * @package WordPress
  * @subpackage Query
  */
 
 /**
  * Retrieves the value of a query variable in the WP_Query class.
  *
  * @since 1.5.0
  * @since 3.9.0 The `$default` argument was introduced.
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param string $var       The variable key to retrieve.
  * @param mixed  $default   Optional. Value to return if the query variable is not set. Default empty.
  * @return mixed Contents of the query variable.
  */
 function get_query_var( $var, $default = '' ) {
 	global $wp_query;
 	return $wp_query->get( $var, $default );
 }
 
 /**
  * Retrieves the currently queried object.
  *
  * Wrapper for WP_Query::get_queried_object().
  *
  * @since 3.1.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return WP_Term|WP_Post_Type|WP_Post|WP_User|null The queried object.
  */
 function get_queried_object() {
 	global $wp_query;
 	return $wp_query->get_queried_object();
 }
 
 /**
  * Retrieves the ID of the currently queried object.
  *
  * Wrapper for WP_Query::get_queried_object_id().
  *
  * @since 3.1.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return int ID of the queried object.
  */
 function get_queried_object_id() {
 	global $wp_query;
 	return $wp_query->get_queried_object_id();
 }
 
 /**
  * Sets the value of a query variable in the WP_Query class.
  *
  * @since 2.2.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param string $var   Query variable key.
  * @param mixed  $value Query variable value.
  */
 function set_query_var( $var, $value ) {
 	global $wp_query;
 	$wp_query->set( $var, $value );
 }
 
 /**
  * Sets up The Loop with query parameters.
  *
  * Note: This function will completely override the main query and isn't intended for use
  * by plugins or themes. Its overly-simplistic approach to modifying the main query can be
  * problematic and should be avoided wherever possible. In most cases, there are better,
  * more performant options for modifying the main query such as via the {@see 'pre_get_posts'}
  * action within WP_Query.
  *
  * This must not be used within the WordPress Loop.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param array|string $query Array or string of WP_Query arguments.
  * @return WP_Post[]|int[] Array of post objects or post IDs.
  */
 function query_posts( $query ) {
 	$GLOBALS['wp_query'] = new WP_Query();
 	return $GLOBALS['wp_query']->query( $query );
 }
 
 /**
  * Destroys the previous query and sets up a new query.
  *
  * This should be used after query_posts() and before another query_posts().
  * This will remove obscure bugs that occur when the previous WP_Query object
  * is not destroyed properly before another is set up.
  *
  * @since 2.3.0
  *
  * @global WP_Query $wp_query     WordPress Query object.
  * @global WP_Query $wp_the_query Copy of the global WP_Query instance created during wp_reset_query().
  */
 function wp_reset_query() {
 	$GLOBALS['wp_query'] = $GLOBALS['wp_the_query'];
 	wp_reset_postdata();
 }
 
 /**
  * After looping through a separate query, this function restores
  * the $post global to the current post in the main query.
  *
  * @since 3.0.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  */
 function wp_reset_postdata() {
 	global $wp_query;
 
 	if ( isset( $wp_query ) ) {
 		$wp_query->reset_postdata();
 	}
 }
 
 /*
  * Query type checks.
  */
 
 /**
  * Determines whether the query is for an existing archive page.
  *
  * Archive pages include category, tag, author, date, custom post type,
  * and custom taxonomy based archives.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @see is_category()
  * @see is_tag()
  * @see is_author()
  * @see is_date()
  * @see is_post_type_archive()
  * @see is_tax()
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for an existing archive page.
  */
 function is_archive() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_archive();
 }
 
 /**
  * Determines whether the query is for an existing post type archive page.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 3.1.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param string|string[] $post_types Optional. Post type or array of posts types
  *                                    to check against. Default empty.
  * @return bool Whether the query is for an existing post type archive page.
  */
 function is_post_type_archive( $post_types = '' ) {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_post_type_archive( $post_types );
 }
 
 /**
  * Determines whether the query is for an existing attachment page.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 2.0.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param int|string|int[]|string[] $attachment Optional. Attachment ID, title, slug, or array of such
  *                                              to check against. Default empty.
  * @return bool Whether the query is for an existing attachment page.
  */
 function is_attachment( $attachment = '' ) {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_attachment( $attachment );
 }
 
 /**
  * Determines whether the query is for an existing author archive page.
  *
  * If the $author parameter is specified, this function will additionally
  * check if the query is for one of the authors specified.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param int|string|int[]|string[] $author Optional. User ID, nickname, nicename, or array of such
  *                                          to check against. Default empty.
  * @return bool Whether the query is for an existing author archive page.
  */
 function is_author( $author = '' ) {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_author( $author );
 }
 
 /**
  * Determines whether the query is for an existing category archive page.
  *
  * If the $category parameter is specified, this function will additionally
  * check if the query is for one of the categories specified.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param int|string|int[]|string[] $category Optional. Category ID, name, slug, or array of such
  *                                            to check against. Default empty.
  * @return bool Whether the query is for an existing category archive page.
  */
 function is_category( $category = '' ) {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_category( $category );
 }
 
 /**
  * Determines whether the query is for an existing tag archive page.
  *
  * If the $tag parameter is specified, this function will additionally
  * check if the query is for one of the tags specified.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 2.3.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param int|string|int[]|string[] $tag Optional. Tag ID, name, slug, or array of such
  *                                       to check against. Default empty.
  * @return bool Whether the query is for an existing tag archive page.
  */
 function is_tag( $tag = '' ) {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_tag( $tag );
 }
 
 /**
  * Determines whether the query is for an existing custom taxonomy archive page.
  *
  * If the $taxonomy parameter is specified, this function will additionally
  * check if the query is for that specific $taxonomy.
  *
  * If the $term parameter is specified in addition to the $taxonomy parameter,
  * this function will additionally check if the query is for one of the terms
  * specified.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 2.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param string|string[]           $taxonomy Optional. Taxonomy slug or slugs to check against.
  *                                            Default empty.
  * @param int|string|int[]|string[] $term     Optional. Term ID, name, slug, or array of such
  *                                            to check against. Default empty.
  * @return bool Whether the query is for an existing custom taxonomy archive page.
  *              True for custom taxonomy archive pages, false for built-in taxonomies
  *              (category and tag archives).
  */
 function is_tax( $taxonomy = '', $term = '' ) {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_tax( $taxonomy, $term );
 }
 
 /**
  * Determines whether the query is for an existing date archive.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for an existing date archive.
  */
 function is_date() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_date();
 }
 
 /**
  * Determines whether the query is for an existing day archive.
  *
  * A conditional check to test whether the page is a date-based archive page displaying posts for the current day.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for an existing day archive.
  */
 function is_day() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_day();
 }
 
 /**
  * Determines whether the query is for a feed.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param string|string[] $feeds Optional. Feed type or array of feed types
  *                                         to check against. Default empty.
  * @return bool Whether the query is for a feed.
  */
 function is_feed( $feeds = '' ) {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_feed( $feeds );
 }
 
 /**
  * Is the query for a comments feed?
  *
  * @since 3.0.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for a comments feed.
  */
 function is_comment_feed() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_comment_feed();
 }
 
 /**
  * Determines whether the query is for the front page of the site.
  *
  * This is for what is displayed at your site's main URL.
  *
  * Depends on the site's "Front page displays" Reading Settings 'show_on_front' and 'page_on_front'.
  *
  * If you set a static page for the front page of your site, this function will return
  * true when viewing that page.
  *
  * Otherwise the same as @see is_home()
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 2.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for the front page of the site.
  */
 function is_front_page() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_front_page();
 }
 
 /**
  * Determines whether the query is for the blog homepage.
  *
  * The blog homepage is the page that shows the time-based blog content of the site.
  *
  * is_home() is dependent on the site's "Front page displays" Reading Settings 'show_on_front'
  * and 'page_for_posts'.
  *
  * If a static page is set for the front page of the site, this function will return true only
  * on the page you set as the "Posts page".
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @see is_front_page()
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for the blog homepage.
  */
 function is_home() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_home();
 }
 
 /**
  * Determines whether the query is for the Privacy Policy page.
  *
  * The Privacy Policy page is the page that shows the Privacy Policy content of the site.
  *
  * is_privacy_policy() is dependent on the site's "Change your Privacy Policy page" Privacy Settings 'wp_page_for_privacy_policy'.
  *
  * This function will return true only on the page you set as the "Privacy Policy page".
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 5.2.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for the Privacy Policy page.
  */
 function is_privacy_policy() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_privacy_policy();
 }
 
 /**
  * Determines whether the query is for an existing month archive.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for an existing month archive.
  */
 function is_month() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_month();
 }
 
 /**
  * Determines whether the query is for an existing single page.
  *
  * If the $page parameter is specified, this function will additionally
  * check if the query is for one of the pages specified.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @see is_single()
  * @see is_singular()
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param int|string|int[]|string[] $page Optional. Page ID, title, slug, or array of such
  *                                        to check against. Default empty.
  * @return bool Whether the query is for an existing single page.
  */
 function is_page( $page = '' ) {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_page( $page );
 }
 
 /**
  * Determines whether the query is for a paged result and not for the first page.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for a paged result.
  */
 function is_paged() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_paged();
 }
 
 /**
  * Determines whether the query is for a post or page preview.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 2.0.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for a post or page preview.
  */
 function is_preview() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_preview();
 }
 
 /**
  * Is the query for the robots.txt file?
  *
  * @since 2.1.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for the robots.txt file.
  */
 function is_robots() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_robots();
 }
 
 /**
  * Is the query for the favicon.ico file?
  *
  * @since 5.4.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for the favicon.ico file.
  */
 function is_favicon() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_favicon();
 }
 
 /**
  * Determines whether the query is for a search.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for a search.
  */
 function is_search() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_search();
 }
 
 /**
  * Determines whether the query is for an existing single post.
  *
  * Works for any post type, except attachments and pages
  *
  * If the $post parameter is specified, this function will additionally
  * check if the query is for one of the Posts specified.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @see is_page()
  * @see is_singular()
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param int|string|int[]|string[] $post Optional. Post ID, title, slug, or array of such
  *                                        to check against. Default empty.
  * @return bool Whether the query is for an existing single post.
  */
 function is_single( $post = '' ) {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_single( $post );
 }
 
 /**
  * Determines whether the query is for an existing single post of any post type
  * (post, attachment, page, custom post types).
  *
  * If the $post_types parameter is specified, this function will additionally
  * check if the query is for one of the Posts Types specified.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @see is_page()
  * @see is_single()
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param string|string[] $post_types Optional. Post type or array of post types
  *                                    to check against. Default empty.
  * @return bool Whether the query is for an existing single post
  *              or any of the given post types.
  */
 function is_singular( $post_types = '' ) {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_singular( $post_types );
 }
 
 /**
  * Determines whether the query is for a specific time.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for a specific time.
  */
 function is_time() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_time();
 }
 
 /**
  * Determines whether the query is for a trackback endpoint call.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for a trackback endpoint call.
  */
 function is_trackback() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_trackback();
 }
 
 /**
  * Determines whether the query is for an existing year archive.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for an existing year archive.
  */
 function is_year() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_year();
 }
 
 /**
  * Determines whether the query has resulted in a 404 (returns no results).
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is a 404 error.
  */
 function is_404() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_404();
 }
 
 /**
  * Is the query for an embedded post?
  *
  * @since 4.4.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is for an embedded post.
  */
 function is_embed() {
 	global $wp_query;
 
 	if ( ! isset( $wp_query ) ) {
 		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 		return false;
 	}
 
 	return $wp_query->is_embed();
 }
 
 /**
  * Determines whether the query is the main query.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 3.3.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool Whether the query is the main query.
  */
 function is_main_query() {
 	global $wp_query;
 
 	if ( 'pre_get_posts' === current_filter() ) {
 		_doing_it_wrong(
 			__FUNCTION__,
 			sprintf(
 				/* translators: 1: pre_get_posts, 2: WP_Query->is_main_query(), 3: is_main_query(), 4: Documentation URL. */
 				__( 'In %1$s, use the %2$s method, not the %3$s function. See %4$s.' ),
 				'<code>pre_get_posts</code>',
 				'<code>WP_Query->is_main_query()</code>',
 				'<code>is_main_query()</code>',
 				__( 'https://developer.wordpress.org/reference/functions/is_main_query/' )
 			),
 			'3.7.0'
 		);
 	}
 
 	return $wp_query->is_main_query();
 }
 
 /*
  * The Loop. Post loop control.
  */
 
 /**
  * Determines whether current WordPress query has posts to loop over.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool True if posts are available, false if end of the loop.
  */
 function have_posts() {
 	global $wp_query;
 	return $wp_query->have_posts();
 }
 
 /**
  * Determines whether the caller is in the Loop.
  *
  * For more information on this and similar theme functions, check out
  * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
  * Conditional Tags} article in the Theme Developer Handbook.
  *
  * @since 2.0.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool True if caller is within loop, false if loop hasn't started or ended.
  */
 function in_the_loop() {
 	global $wp_query;
 	return $wp_query->in_the_loop;
 }
 
 /**
  * Rewind the loop posts.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  */
 function rewind_posts() {
 	global $wp_query;
 	$wp_query->rewind_posts();
 }
 
 /**
  * Iterate the post index in the loop.
  *
  * @since 1.5.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  */
 function the_post() {
 	global $wp_query;
 	$wp_query->the_post();
 }
 
 /*
  * Comments loop.
  */
 
 /**
  * Determines whether current WordPress query has comments to loop over.
  *
  * @since 2.2.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return bool True if comments are available, false if no more comments.
  */
 function have_comments() {
 	global $wp_query;
 	return $wp_query->have_comments();
 }
 
 /**
  * Iterate comment index in the comment loop.
  *
  * @since 2.2.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @return null
  */
 function the_comment() {
 	global $wp_query;
 	return $wp_query->the_comment();
 }
 
 /**
  * Redirect old slugs to the correct permalink.
  *
  * Attempts to find the current slug from the past slugs.
  *
  * @since 2.1.0
  */
 function wp_old_slug_redirect() {
 	if ( is_404() && '' !== get_query_var( 'name' ) ) {
 		// Guess the current post type based on the query vars.
 		if ( get_query_var( 'post_type' ) ) {
 			$post_type = get_query_var( 'post_type' );
 		} elseif ( get_query_var( 'attachment' ) ) {
 			$post_type = 'attachment';
 		} elseif ( get_query_var( 'pagename' ) ) {
 			$post_type = 'page';
 		} else {
 			$post_type = 'post';
 		}
 
 		if ( is_array( $post_type ) ) {
 			if ( count( $post_type ) > 1 ) {
 				return;
 			}
 			$post_type = reset( $post_type );
 		}
 
 		// Do not attempt redirect for hierarchical post types.
 		if ( is_post_type_hierarchical( $post_type ) ) {
 			return;
 		}
 
 		$id = _find_post_by_old_slug( $post_type );
 
 		if ( ! $id ) {
 			$id = _find_post_by_old_date( $post_type );
 		}
 
 		/**
 		 * Filters the old slug redirect post ID.
 		 *
 		 * @since 4.9.3
 		 *
 		 * @param int $id The redirect post ID.
 		 */
 		$id = apply_filters( 'old_slug_redirect_post_id', $id );
 
 		if ( ! $id ) {
 			return;
 		}
 
 		$link = get_permalink( $id );
 
 		if ( get_query_var( 'paged' ) > 1 ) {
 			$link = user_trailingslashit( trailingslashit( $link ) . 'page/' . get_query_var( 'paged' ) );
 		} elseif ( is_embed() ) {
 			$link = user_trailingslashit( trailingslashit( $link ) . 'embed' );
 		}
 
 		/**
 		 * Filters the old slug redirect URL.
 		 *
 		 * @since 4.4.0
 		 *
 		 * @param string $link The redirect URL.
 		 */
 		$link = apply_filters( 'old_slug_redirect_url', $link );
 
 		if ( ! $link ) {
 			return;
 		}
 
 		wp_redirect( $link, 301 ); // Permanent redirect.
 		exit;
 	}
 }
 
 /**
  * Find the post ID for redirecting an old slug.
  *
  * @since 4.9.3
  * @access private
  *
  * @see wp_old_slug_redirect()
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string $post_type The current post type based on the query vars.
  * @return int The Post ID.
  */
 function _find_post_by_old_slug( $post_type ) {
 	global $wpdb;
 
 	$query = $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta, $wpdb->posts WHERE ID = post_id AND post_type = %s AND meta_key = '_wp_old_slug' AND meta_value = %s", $post_type, get_query_var( 'name' ) );
 
 	// If year, monthnum, or day have been specified, make our query more precise
 	// just in case there are multiple identical _wp_old_slug values.
 	if ( get_query_var( 'year' ) ) {
 		$query .= $wpdb->prepare( ' AND YEAR(post_date) = %d', get_query_var( 'year' ) );
 	}
 	if ( get_query_var( 'monthnum' ) ) {
 		$query .= $wpdb->prepare( ' AND MONTH(post_date) = %d', get_query_var( 'monthnum' ) );
 	}
 	if ( get_query_var( 'day' ) ) {
 		$query .= $wpdb->prepare( ' AND DAYOFMONTH(post_date) = %d', get_query_var( 'day' ) );
 	}
 
 	$id = (int) $wpdb->get_var( $query );
 
 	return $id;
 }
 
 /**
  * Find the post ID for redirecting an old date.
  *
  * @since 4.9.3
  * @access private
  *
  * @see wp_old_slug_redirect()
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string $post_type The current post type based on the query vars.
  * @return int The Post ID.
  */
 function _find_post_by_old_date( $post_type ) {
 	global $wpdb;
 
 	$date_query = '';
 	if ( get_query_var( 'year' ) ) {
 		$date_query .= $wpdb->prepare( ' AND YEAR(pm_date.meta_value) = %d', get_query_var( 'year' ) );
 	}
 	if ( get_query_var( 'monthnum' ) ) {
 		$date_query .= $wpdb->prepare( ' AND MONTH(pm_date.meta_value) = %d', get_query_var( 'monthnum' ) );
 	}
 	if ( get_query_var( 'day' ) ) {
 		$date_query .= $wpdb->prepare( ' AND DAYOFMONTH(pm_date.meta_value) = %d', get_query_var( 'day' ) );
 	}
 
 	$id = 0;
 	if ( $date_query ) {
 		$id = (int) $wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta AS pm_date, $wpdb->posts WHERE ID = post_id AND post_type = %s AND meta_key = '_wp_old_date' AND post_name = %s" . $date_query, $post_type, get_query_var( 'name' ) ) );
 
 		if ( ! $id ) {
 			// Check to see if an old slug matches the old date.
 			$id = (int) $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts, $wpdb->postmeta AS pm_slug, $wpdb->postmeta AS pm_date WHERE ID = pm_slug.post_id AND ID = pm_date.post_id AND post_type = %s AND pm_slug.meta_key = '_wp_old_slug' AND pm_slug.meta_value = %s AND pm_date.meta_key = '_wp_old_date'" . $date_query, $post_type, get_query_var( 'name' ) ) );
 		}
 	}
 
 	return $id;
 }
 
 /**
  * Set up global post data.
  *
  * @since 1.5.0
  * @since 4.4.0 Added the ability to pass a post ID to `$post`.
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param WP_Post|object|int $post WP_Post instance or Post ID/object.
  * @return bool True when finished.
  */
 function setup_postdata( $post ) {
 	global $wp_query;
 
 	if ( ! empty( $wp_query ) && $wp_query instanceof WP_Query ) {
 		return $wp_query->setup_postdata( $post );
 	}
 
 	return false;
 }
 
 /**
  * Generates post data.
  *
  * @since 5.2.0
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @param WP_Post|object|int $post WP_Post instance or Post ID/object.
  * @return array|false Elements of post, or false on failure.
  */
 function generate_postdata( $post ) {
 	global $wp_query;
 
 	if ( ! empty( $wp_query ) && $wp_query instanceof WP_Query ) {
 		return $wp_query->generate_postdata( $post );
 	}
 
 	return false;
 }