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Description

Marks a deprecated action or filter hook as deprecated and throws a notice.

Use the deprecated_hook_run action to get the backtrace describing where the deprecated hook was called. Default behavior is to trigger a user error if WP_DEBUG is true. This function is called by the do_action_deprecated() and apply_filters_deprecated() functions, and so generally does not need to be called directly.

Usage

_deprecated_hook( $hook, $version, $replacement, $message );

Parameters

$hook

( string ) required – The hook that was used.

$version

( string ) required – The version of WordPress that deprecated the hook.

$replacement

( string ) optional – Optional. The hook that should have been used.

$message

( string ) optional – Optional. A message regarding the change.

Returns

void

Source

File name: wordpress/wp-includes/functions.php
Lines:

function _deprecated_hook( $hook, $version, $replacement = null, $message = null ) {
  
/**
 * Fires when a deprecated hook is called.
 *
 * @since 4.6.0
 *
 * @param string $hook        The hook that was called.
 * @param string $replacement The hook that should be used as a replacement.
 * @param string $version     The version of WordPress that deprecated the argument used.
 * @param string $message     A message regarding the change.
 */
  do_action( 'deprecated_hook_run', $hook, $replacement, $version, $message );

  
/**
 * Filters whether to trigger deprecated hook errors.
 *
 * @since 4.6.0
 *
 * @param bool $trigger Whether to trigger deprecated hook errors. Requires
 *                      `WP_DEBUG` to be defined true.
 */
  if ( WP_DEBUG && apply_filters( 'deprecated_hook_trigger_error', true ) ) {
    $message = empty( $message ) ? '' : ' ' . $message;
    if ( ! is_null( $replacement ) ) {
      /* translators: 1: WordPress hook name, 2: version number, 3: alternative hook name */
      trigger_error( sprintf( __( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ), $hook, $version, $replacement ) . $message );
    } else {
      /* translators: 1: WordPress hook name, 2: version number */
      trigger_error( sprintf( __( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.' ), $hook, $version ) . $message );
    }
  }
}
 

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