wp_is_maintenance_mode() │ WP 5.5.0

Checks if maintenance mode is enabled.

Checks for a file in the WordPress root directory named ".maintenance". This file will contain the variable $upgrading, set to the time the file was created. If the file was created less than 10 minutes ago, WordPress is in maintenance mode.

Returns

bool. True if maintenance mode is enabled, false otherwise.

Usage

wp_is_maintenance_mode();

Notes

Changelog

wp_is_maintenance_mode() wp is maintenance mode code ^{WP 7.1}

function wp_is_maintenance_mode() {
	global $upgrading;

	if ( ! file_exists( ABSPATH . '.maintenance' ) || wp_installing() ) {
		return false;
	}

	require ABSPATH . '.maintenance';

	// If the $upgrading timestamp is older than 10 minutes, consider maintenance over.
	if ( ( time() - $upgrading ) >= 10 * MINUTE_IN_SECONDS ) {
		return false;
	}

	// Don't enable maintenance mode while scraping for fatal errors.
	if ( is_int( $upgrading ) && isset( $_REQUEST['wp_scrape_key'], $_REQUEST['wp_scrape_nonce'] ) ) {
		$key   = stripslashes( $_REQUEST['wp_scrape_key'] );
		$nonce = stripslashes( $_REQUEST['wp_scrape_nonce'] );

		if ( md5( $upgrading ) === $key && (int) $nonce === $upgrading ) {
			return false;
		}
	}

	/**
	 * Filters whether to enable maintenance mode.
	 *
	 * This filter runs before it can be used by plugins. It is designed for
	 * non-web runtimes. If this filter returns true, maintenance mode will be
	 * active and the request will end. If false, the request will be allowed to
	 * continue processing even if maintenance mode should be active.
	 *
	 * @since 4.6.0
	 *
	 * @param bool $enable_checks Whether to enable maintenance mode. Default true.
	 * @param int  $upgrading     The timestamp set in the .maintenance file.
	 */
	if ( ! apply_filters( 'enable_maintenance_mode', true, $upgrading ) ) {
		return false;
	}

	return true;
}