wp_opcache_invalidate( string $filepath, bool $force = false ): bool

2714function wp_opcache_invalidate( $filepath, $force = false ) {2715	static $can_invalidate = null;2716 2717	/*2718	 * Check to see if WordPress is able to run `opcache_invalidate()` or not, and cache the value.2719	 *2720	 * First, check to see if the function is available to call, then if the host has restricted2721	 * the ability to run the function to avoid a PHP warning.2722	 *2723	 * `opcache.restrict_api` can specify the path for files allowed to call `opcache_invalidate()`.2724	 *2725	 * If the host has this set, check whether the path in `opcache.restrict_api` matches2726	 * the beginning of the path of the origin file.2727	 *2728	 * `$_SERVER['SCRIPT_FILENAME']` approximates the origin file's path, but `realpath()`2729	 * is necessary because `SCRIPT_FILENAME` can be a relative path when run from CLI.2730	 *2731	 * For more details, see:2732	 * - https://www.php.net/manual/en/opcache.configuration.php2733	 * - https://www.php.net/manual/en/reserved.variables.server.php2734	 * - https://core.trac.wordpress.org/ticket/364552735	 */2736	if ( null === $can_invalidate2737		&& function_exists( 'opcache_invalidate' )2738		&& ( ! ini_get( 'opcache.restrict_api' )2739			|| stripos( realpath( $_SERVER['SCRIPT_FILENAME'] ), ini_get( 'opcache.restrict_api' ) ) === 0 )2740	) {2741		$can_invalidate = true;2742	}2743 2744	// If invalidation is not available, return early.2745	if ( ! $can_invalidate ) {2746		return false;2747	}2748 2749	// Verify that file to be invalidated has a PHP extension.2750	if ( '.php' !== strtolower( substr( $filepath, -4 ) ) ) {2751		return false;2752	}2753 2754	/**2755	 * Filters whether to invalidate a file from the opcode cache.2756	 *2757	 * @since 5.5.02758	 *2759	 * @param bool   $will_invalidate Whether WordPress will invalidate `$filepath`. Default true.2760	 * @param string $filepath        The path to the PHP file to invalidate.2761	 */2762	if ( apply_filters( 'wp_opcache_invalidate_file', true, $filepath ) ) {2763		return opcache_invalidate( $filepath, $force );2764	}2765 2766	return false;2767}