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 );
	}
}

@akkara what was the issue/error you were having with the above code?

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

I've made the function even simpler for those who are running WP 4.7 or higher (it won't work for older WP versions). It works well!

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     = wp_list_pluck( $wp_filter[ $tag ]->callbacks[ $priority ], 'function' );
	    $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;
}

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 (<notifications@github.com>) 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> .