unset-class-closeure.php

<?php
/**
 * Remove an object filter.
 *
 * @param  string          $tag                Hook name.
 * @param  string|array    $callback           Class name or array with class and method.
 * @param  string|int|void $priority  Priority, leave empty for all.
 * @return bool true if removed, false if not.
 *
 * @link https://wordpress.stackexchange.com/a/140989
 */
function remove_object_filter( $tag, $callback, $priority = null ): bool {
	/**
	 * The current hook @var \WP_Hook $wp_hook
	 */
	$wp_hook = $GLOBALS['wp_filter'][ $tag ];
	if ( empty( $wp_hook ) ) {
		return false;
	}

	if ( is_array( $callback ) ) {
		$class_name = $callback[0];
		$method     = $callback[1];
	} else {
		$class_name = 'Closure';
		$method     = null;
	}

	foreach ( $wp_hook as $p => $filter ) {
		if ( ! is_null( $priority ) && ( (int) $priority !== (int) $p ) ) {
			continue;
		}
		$remove = false;
		foreach ( $filter as $identifier => $function ) {
			$function = $function['function'];
			if ( ! is_array( $function ) && $function instanceof \Closure && $class_name === 'Closure' ) {
				$remove = true;
			} elseif ( is_a( $function[0], $class_name ) || ltrim( $function[0], '\\' ) === ltrim( $class_name, '\\' ) ) {
				$remove = ( $method && ( $method === $function[1] ) );
			}

			if ( $remove ) {
				unset( $wp_hook->callbacks[ $p ][ $identifier ] );
				return true;
			}
		}
	}
	return false;
}