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class-wp-error.php (7302B)

---

 <?php
 /**
  * WordPress Error API.
  *
  * @package WordPress
  */
 
 /**
  * WordPress Error class.
  *
  * Container for checking for WordPress errors and error messages. Return
  * WP_Error and use is_wp_error() to check if this class is returned. Many
  * core WordPress functions pass this class in the event of an error and
  * if not handled properly will result in code errors.
  *
  * @since 2.1.0
  */
 class WP_Error {
 	/**
 	 * Stores the list of errors.
 	 *
 	 * @since 2.1.0
 	 * @var array
 	 */
 	public $errors = array();
 
 	/**
 	 * Stores the most recently added data for each error code.
 	 *
 	 * @since 2.1.0
 	 * @var array
 	 */
 	public $error_data = array();
 
 	/**
 	 * Stores previously added data added for error codes, oldest-to-newest by code.
 	 *
 	 * @since 5.6.0
 	 * @var array[]
 	 */
 	protected $additional_data = array();
 
 	/**
 	 * Initializes the error.
 	 *
 	 * If `$code` is empty, the other parameters will be ignored.
 	 * When `$code` is not empty, `$message` will be used even if
 	 * it is empty. The `$data` parameter will be used only if it
 	 * is not empty.
 	 *
 	 * Though the class is constructed with a single error code and
 	 * message, multiple codes can be added using the `add()` method.
 	 *
 	 * @since 2.1.0
 	 *
 	 * @param string|int $code    Error code.
 	 * @param string     $message Error message.
 	 * @param mixed      $data    Optional. Error data.
 	 */
 	public function __construct( $code = '', $message = '', $data = '' ) {
 		if ( empty( $code ) ) {
 			return;
 		}
 
 		$this->add( $code, $message, $data );
 	}
 
 	/**
 	 * Retrieves all error codes.
 	 *
 	 * @since 2.1.0
 	 *
 	 * @return array List of error codes, if available.
 	 */
 	public function get_error_codes() {
 		if ( ! $this->has_errors() ) {
 			return array();
 		}
 
 		return array_keys( $this->errors );
 	}
 
 	/**
 	 * Retrieves the first error code available.
 	 *
 	 * @since 2.1.0
 	 *
 	 * @return string|int Empty string, if no error codes.
 	 */
 	public function get_error_code() {
 		$codes = $this->get_error_codes();
 
 		if ( empty( $codes ) ) {
 			return '';
 		}
 
 		return $codes[0];
 	}
 
 	/**
 	 * Retrieves all error messages, or the error messages for the given error code.
 	 *
 	 * @since 2.1.0
 	 *
 	 * @param string|int $code Optional. Retrieve messages matching code, if exists.
 	 * @return array Error strings on success, or empty array if there are none.
 	 */
 	public function get_error_messages( $code = '' ) {
 		// Return all messages if no code specified.
 		if ( empty( $code ) ) {
 			$all_messages = array();
 			foreach ( (array) $this->errors as $code => $messages ) {
 				$all_messages = array_merge( $all_messages, $messages );
 			}
 
 			return $all_messages;
 		}
 
 		if ( isset( $this->errors[ $code ] ) ) {
 			return $this->errors[ $code ];
 		} else {
 			return array();
 		}
 	}
 
 	/**
 	 * Gets a single error message.
 	 *
 	 * This will get the first message available for the code. If no code is
 	 * given then the first code available will be used.
 	 *
 	 * @since 2.1.0
 	 *
 	 * @param string|int $code Optional. Error code to retrieve message.
 	 * @return string The error message.
 	 */
 	public function get_error_message( $code = '' ) {
 		if ( empty( $code ) ) {
 			$code = $this->get_error_code();
 		}
 		$messages = $this->get_error_messages( $code );
 		if ( empty( $messages ) ) {
 			return '';
 		}
 		return $messages[0];
 	}
 
 	/**
 	 * Retrieves the most recently added error data for an error code.
 	 *
 	 * @since 2.1.0
 	 *
 	 * @param string|int $code Optional. Error code.
 	 * @return mixed Error data, if it exists.
 	 */
 	public function get_error_data( $code = '' ) {
 		if ( empty( $code ) ) {
 			$code = $this->get_error_code();
 		}
 
 		if ( isset( $this->error_data[ $code ] ) ) {
 			return $this->error_data[ $code ];
 		}
 	}
 
 	/**
 	 * Verifies if the instance contains errors.
 	 *
 	 * @since 5.1.0
 	 *
 	 * @return bool If the instance contains errors.
 	 */
 	public function has_errors() {
 		if ( ! empty( $this->errors ) ) {
 			return true;
 		}
 		return false;
 	}
 
 	/**
 	 * Adds an error or appends an additional message to an existing error.
 	 *
 	 * @since 2.1.0
 	 *
 	 * @param string|int $code    Error code.
 	 * @param string     $message Error message.
 	 * @param mixed      $data    Optional. Error data.
 	 */
 	public function add( $code, $message, $data = '' ) {
 		$this->errors[ $code ][] = $message;
 
 		if ( ! empty( $data ) ) {
 			$this->add_data( $data, $code );
 		}
 
 		/**
 		 * Fires when an error is added to a WP_Error object.
 		 *
 		 * @since 5.6.0
 		 *
 		 * @param string|int $code     Error code.
 		 * @param string     $message  Error message.
 		 * @param mixed      $data     Error data. Might be empty.
 		 * @param WP_Error   $wp_error The WP_Error object.
 		 */
 		do_action( 'wp_error_added', $code, $message, $data, $this );
 	}
 
 	/**
 	 * Adds data to an error with the given code.
 	 *
 	 * @since 2.1.0
 	 * @since 5.6.0 Errors can now contain more than one item of error data. {@see WP_Error::$additional_data}.
 	 *
 	 * @param mixed      $data Error data.
 	 * @param string|int $code Error code.
 	 */
 	public function add_data( $data, $code = '' ) {
 		if ( empty( $code ) ) {
 			$code = $this->get_error_code();
 		}
 
 		if ( isset( $this->error_data[ $code ] ) ) {
 			$this->additional_data[ $code ][] = $this->error_data[ $code ];
 		}
 
 		$this->error_data[ $code ] = $data;
 	}
 
 	/**
 	 * Retrieves all error data for an error code in the order in which the data was added.
 	 *
 	 * @since 5.6.0
 	 *
 	 * @param string|int $code Error code.
 	 * @return mixed[] Array of error data, if it exists.
 	 */
 	public function get_all_error_data( $code = '' ) {
 		if ( empty( $code ) ) {
 			$code = $this->get_error_code();
 		}
 
 		$data = array();
 
 		if ( isset( $this->additional_data[ $code ] ) ) {
 			$data = $this->additional_data[ $code ];
 		}
 
 		if ( isset( $this->error_data[ $code ] ) ) {
 			$data[] = $this->error_data[ $code ];
 		}
 
 		return $data;
 	}
 
 	/**
 	 * Removes the specified error.
 	 *
 	 * This function removes all error messages associated with the specified
 	 * error code, along with any error data for that code.
 	 *
 	 * @since 4.1.0
 	 *
 	 * @param string|int $code Error code.
 	 */
 	public function remove( $code ) {
 		unset( $this->errors[ $code ] );
 		unset( $this->error_data[ $code ] );
 		unset( $this->additional_data[ $code ] );
 	}
 
 	/**
 	 * Merges the errors in the given error object into this one.
 	 *
 	 * @since 5.6.0
 	 *
 	 * @param WP_Error $error Error object to merge.
 	 */
 	public function merge_from( WP_Error $error ) {
 		static::copy_errors( $error, $this );
 	}
 
 	/**
 	 * Exports the errors in this object into the given one.
 	 *
 	 * @since 5.6.0
 	 *
 	 * @param WP_Error $error Error object to export into.
 	 */
 	public function export_to( WP_Error $error ) {
 		static::copy_errors( $this, $error );
 	}
 
 	/**
 	 * Copies errors from one WP_Error instance to another.
 	 *
 	 * @since 5.6.0
 	 *
 	 * @param WP_Error $from The WP_Error to copy from.
 	 * @param WP_Error $to   The WP_Error to copy to.
 	 */
 	protected static function copy_errors( WP_Error $from, WP_Error $to ) {
 		foreach ( $from->get_error_codes() as $code ) {
 			foreach ( $from->get_error_messages( $code ) as $error_message ) {
 				$to->add( $code, $error_message );
 			}
 
 			foreach ( $from->get_all_error_data( $code ) as $data ) {
 				$to->add_data( $data, $code );
 			}
 		}
 	}
 }