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

2725function wp_opcache_invalidate( $filepath, $force = false ) {2726	static $can_invalidate = null;2727 2728	/*2729	 * Check to see if WordPress is able to run `opcache_invalidate()` or not, and cache the value.2730	 *2731	 * First, check to see if the function is available to call, then if the host has restricted2732	 * the ability to run the function to avoid a PHP warning.2733	 *2734	 * `opcache.restrict_api` can specify the path for files allowed to call `opcache_invalidate()`.2735	 *2736	 * If the host has this set, check whether the path in `opcache.restrict_api` matches2737	 * the beginning of the path of the origin file.2738	 *2739	 * `$_SERVER['SCRIPT_FILENAME']` approximates the origin file's path, but `realpath()`2740	 * is necessary because `SCRIPT_FILENAME` can be a relative path when run from CLI.2741	 *2742	 * For more details, see:2743	 * - https://www.php.net/manual/en/opcache.configuration.php2744	 * - https://www.php.net/manual/en/reserved.variables.server.php2745	 * - https://core.trac.wordpress.org/ticket/364552746	 */2747	if ( null === $can_invalidate2748		&& function_exists( 'opcache_invalidate' )2749		&& ( ! ini_get( 'opcache.restrict_api' )2750			|| stripos( realpath( $_SERVER['SCRIPT_FILENAME'] ), ini_get( 'opcache.restrict_api' ) ) === 0 )2751	) {2752		$can_invalidate = true;2753	}2754 2755	// If invalidation is not available, return early.2756	if ( ! $can_invalidate ) {2757		return false;2758	}2759 2760	// Verify that file to be invalidated has a PHP extension.2761	if ( '.php' !== strtolower( substr( $filepath, -4 ) ) ) {2762		return false;2763	}2764 2765	/**2766	 * Filters whether to invalidate a file from the opcode cache.2767	 *2768	 * @since 5.5.02769	 *2770	 * @param bool   $will_invalidate Whether WordPress will invalidate `$filepath`. Default true.2771	 * @param string $filepath        The path to the PHP file to invalidate.2772	 */2773	if ( apply_filters( 'wp_opcache_invalidate_file', true, $filepath ) ) {2774		return opcache_invalidate( $filepath, $force );2775	}2776 2777	return false;2778}