update_option

Source code

function update_option( $option, $newvalue ) {

	global $wpdb;



	$option = trim($option);

	if ( empty($option) )

		return false;



	wp_protect_special_option( $option );



	if ( is_object($newvalue) )

		$newvalue = clone $newvalue;



	$newvalue = sanitize_option( $option, $newvalue );

	$oldvalue = get_option( $option );

	$newvalue = apply_filters( 'pre_update_option_' . $option, $newvalue, $oldvalue );



	// If the new and old values are the same, no need to update.

	if ( $newvalue === $oldvalue )

		return false;



	if ( false === $oldvalue )

		return add_option( $option, $newvalue );



	$notoptions = wp_cache_get( 'notoptions', 'options' );

	if ( is_array( $notoptions ) && isset( $notoptions[$option] ) ) {

		unset( $notoptions[$option] );

		wp_cache_set( 'notoptions', $notoptions, 'options' );

	}



	$_newvalue = $newvalue;

	$newvalue = maybe_serialize( $newvalue );



	do_action( 'update_option', $option, $oldvalue, $_newvalue );

	if ( ! defined( 'WP_INSTALLING' ) ) {

		$alloptions = wp_load_alloptions();

		if ( isset( $alloptions[$option] ) ) {

			$alloptions[$option] = $_newvalue;

			wp_cache_set( 'alloptions', $alloptions, 'options' );

		} else {

			wp_cache_set( $option, $_newvalue, 'options' );

		}

	}



	$result = $wpdb->update( $wpdb->options, array( 'option_value' => $newvalue ), array( 'option_name' => $option ) );



	if ( $result ) {

		do_action( "update_option_{$option}", $oldvalue, $_newvalue );

		do_action( 'updated_option', $option, $oldvalue, $_newvalue );

		return true;

	}