get_transient

Source code

function get_transient( $transient ) {

	global $_wp_using_ext_object_cache;



	$pre = apply_filters( 'pre_transient_' . $transient, false );

	if ( false !== $pre )

		return $pre;



	if ( $_wp_using_ext_object_cache ) {

		$value = wp_cache_get( $transient, 'transient' );

	} else {

		$transient_option = '_transient_' . $transient;

		if ( ! defined( 'WP_INSTALLING' ) ) {

			// If option is not in alloptions, it is not autoloaded and thus has a timeout

			$alloptions = wp_load_alloptions();

			if ( !isset( $alloptions[$transient_option] ) ) {

				$transient_timeout = '_transient_timeout_' . $transient;

				if ( get_option( $transient_timeout ) < time() ) {

					delete_option( $transient_option  );

					delete_option( $transient_timeout );

					return false;

				}

			}

		}



		$value = get_option( $transient_option );

	}



	return apply_filters( 'transient_' . $transient, $value );

}