WordPress Remove Filter (remove_filter converted to remove_class_filter) to remove Filter/Action without Class Object access. Works with WordPress 1.2+ (4.7+ support added 9-19-2016)

functions.php

<?php
/**
 * Make sure the function does not exist before defining it
 */
if( ! function_exists( 'remove_class_filter' ) ){

	/**
	 * Remove Class Filter Without Access to Class Object
	 *
	 * In order to use the core WordPress remove_filter() on a filter added with the callback
	 * to a class, you either have to have access to that class object, or it has to be a call
	 * to a static method.  This method allows you to remove filters with a callback to a class
	 * you don't have access to.
	 *
	 * Works with WordPress 1.2+ (4.7+ support added 9-19-2016)
	 * Updated 2-27-2017 to use internal WordPress removal for 4.7+ (to prevent PHP warnings output)
	 *
	 * @param string $tag         Filter to remove
	 * @param string $class_name  Class name for the filter's callback
	 * @param string $method_name Method name for the filter's callback
	 * @param int    $priority    Priority of the filter (default 10)
	 *
	 * @return bool Whether the function is removed.
	 */
	function remove_class_filter( $tag, $class_name = '', $method_name = '', $priority = 10 ) {

		global $wp_filter;

		// Check that filter actually exists first
		if ( ! isset( $wp_filter[ $tag ] ) ) {
			return FALSE;
		}

		/**
		 * If filter config is an object, means we're using WordPress 4.7+ and the config is no longer
		 * a simple array, rather it is an object that implements the ArrayAccess interface.
		 *
		 * To be backwards compatible, we set $callbacks equal to the correct array as a reference (so $wp_filter is updated)
		 *
		 * @see https://make.wordpress.org/core/2016/09/08/wp_hook-next-generation-actions-and-filters/
		 */
		if ( is_object( $wp_filter[ $tag ] ) && isset( $wp_filter[ $tag ]->callbacks ) ) {
			// Create $fob object from filter tag, to use below
			$fob       = $wp_filter[ $tag ];
			$callbacks = &$wp_filter[ $tag ]->callbacks;
		} else {
			$callbacks = &$wp_filter[ $tag ];
		}

		// Exit if there aren't any callbacks for specified priority
		if ( ! isset( $callbacks[ $priority ] ) || empty( $callbacks[ $priority ] ) ) {
			return FALSE;
		}

		// Loop through each filter for the specified priority, looking for our class & method
		foreach ( (array) $callbacks[ $priority ] as $filter_id => $filter ) {

			// Filter should always be an array - array( $this, 'method' ), if not goto next
			if ( ! isset( $filter['function'] ) || ! is_array( $filter['function'] ) ) {
				continue;
			}

			// If first value in array is not an object, it can't be a class
			if ( ! is_object( $filter['function'][0] ) ) {
				continue;
			}

			// Method doesn't match the one we're looking for, goto next
			if ( $filter['function'][1] !== $method_name ) {
				continue;
			}

			// Method matched, now let's check the Class
			if ( get_class( $filter['function'][0] ) === $class_name ) {

				// WordPress 4.7+ use core remove_filter() since we found the class object
				if ( isset( $fob ) ) {
					// Handles removing filter, reseting callback priority keys mid-iteration, etc.
					$fob->remove_filter( $tag, $filter['function'], $priority );

				} else {
					// Use legacy removal process (pre 4.7)
					unset( $callbacks[ $priority ][ $filter_id ] );
					// and if it was the only filter in that priority, unset that priority
					if ( empty( $callbacks[ $priority ] ) ) {
						unset( $callbacks[ $priority ] );
					}
					// and if the only filter for that tag, set the tag to an empty array
					if ( empty( $callbacks ) ) {
						$callbacks = array();
					}
					// Remove this filter from merged_filters, which specifies if filters have been sorted
					unset( $GLOBALS['merged_filters'][ $tag ] );
				}

				return TRUE;
			}
		}

		return FALSE;
	}
}

/**
 * Make sure the function does not exist before defining it
 */
if( ! function_exists( 'remove_class_action') ){

	/**
	 * Remove Class Action Without Access to Class Object
	 *
	 * In order to use the core WordPress remove_action() on an action added with the callback
	 * to a class, you either have to have access to that class object, or it has to be a call
	 * to a static method.  This method allows you to remove actions with a callback to a class
	 * you don't have access to.
	 *
	 * Works with WordPress 1.2+ (4.7+ support added 9-19-2016)
	 *
	 * @param string $tag         Action to remove
	 * @param string $class_name  Class name for the action's callback
	 * @param string $method_name Method name for the action's callback
	 * @param int    $priority    Priority of the action (default 10)
	 *
	 * @return bool               Whether the function is removed.
	 */
	function remove_class_action( $tag, $class_name = '', $method_name = '', $priority = 10 ) {
		return remove_class_filter( $tag, $class_name, $method_name, $priority );
	}
}

What do you hook this to? I tried plugins_loaded, but it didnt do anything

All depends on what you're trying to remove. You need to determine when the add_action is being called (that you want to remove), and make sure you're calling your code to remove it, AFTER that point ... either with a higher priority to another action, or after that code has been ran to add that action/filter

Thank you so much @davelavoie it's working perfectly.

Awesome! Thanks.

@davelavoie Thank you very much! It save me a lot of time !

Very useful! Thank you! I think remove_class_action should return remove_class_filter as latter returns trueif successful. So it should read return remove_class_filter($tag, $class_name, $method_name, $priority);

@ouun yes i agree, updated the gist to reflect that, thanks!

Thanks a lot, struggled to remove an action with a class name and your functions worked straight away!

Hi all,
From WP 5.5, there seems to be an issue when removing anonymous functions that could cause an Uncaught Error: Closure object cannot have properties in /var/www/html/wp-includes/class-wp-list-util.php:115.

I have seen a related issue here: senlin/so-clean-up-wp-seo#88
Where a new filter to this function was added on this commit:
senlin/so-clean-up-wp-seo@aa061ca

function remove_class_hook( $tag, $class_name = '', $method_name = '', $priority = 10 ) {
    global $wp_filter;
    $is_hook_removed = false;
    if ( ! empty( $wp_filter[ $tag ]->callbacks[ $priority ] ) ) {
        $methods = array_filter(wp_list_pluck(
            $wp_filter[ $tag ]->callbacks[ $priority ],
            'function'
        ), function ($method) {
            /**
             * Allow only array & string notation for hooks, since we're
             * looking to remove an exact method of a class anyway. And the
             * method of the class is passed in as a string anyway.
             */
            return is_string($method) || is_array($method);
        });
        $found_hooks = ! empty( $methods ) ? wp_list_filter( $methods, array( 1 => $method_name ) ) : array();
        foreach( $found_hooks as $hook_key => $hook ) {
            if ( ! empty( $hook[0] ) && is_object( $hook[0] ) && get_class( $hook[0] ) === $class_name ) {
                $wp_filter[ $tag ]->remove_filter( $tag, $hook, $priority );
                $is_hook_removed = true;
            }
        }
    }
    return $is_hook_removed;
}

Buenas tardes al Equipo Lucas Ferreira. Gracias por la atención. Yo hablo otros idiomas, el principal el español, el segundo más hablado en el mundo. Y si continuamente voy a recibir esta información en inglés, pues no estoy dispuesto por mi parte que sea así. Por tanto no deseo recibir más correos en inglés, y si no hay solución prefiero dar baja a la suscripción. Y no manden más correos así. Gracias de nuevo y buen día. Anselmo García El lun., 16 nov. 2020 a las 9:30, Lucas Ferreira (<[email protected]>) escribió:

…

***@***.**** commented on this gist. ------------------------------ Hi all, From WP 5.5, there seems to be an issue when removing anonymous functions that could cause an *Uncaught Error: Closure object cannot have properties in /var/www/html/wp-includes/class-wp-list-util.php:115*. I have seen a related issue here: senlin/so-clean-up-wp-seo#88 <senlin/so-clean-up-wp-seo#88> Where a new filter to this function was added on this commit: ***@***.*** <senlin/so-clean-up-wp-seo@aa061ca> function remove_class_hook( $tag, $class_name = '', $method_name = '', $priority = 10 ) { global $wp_filter; $is_hook_removed = false; if ( ! empty( $wp_filter[ $tag ]->callbacks[ $priority ] ) ) { $methods = array_filter(wp_list_pluck( $wp_filter[ $tag ]->callbacks[ $priority ], 'function' ), function ($method) { /** * Allow only array & string notation for hooks, since we're * looking to remove an exact method of a class anyway. And the * method of the class is passed in as a string anyway. */ return is_string($method) || is_array($method); }); $found_hooks = ! empty( $methods ) ? wp_list_filter( $methods, array( 1 => $method_name ) ) : array(); foreach( $found_hooks as $hook_key => $hook ) { if ( ! empty( $hook[0] ) && is_object( $hook[0] ) && get_class( $hook[0] ) === $class_name ) { $wp_filter[ $tag ]->remove_filter( $tag, $hook, $priority ); $is_hook_removed = true; } } } return $is_hook_removed; } — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <https://gist.github.com/c6518efc1753cf2392559866b4bd1a53#gistcomment-3528826>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKVN4VXOHPJRLN75TCLNC63SQDPIRANCNFSM4HKVSZVA> .