add_option

Source code

function add_option( $option, $value = '', $deprecated = '', $autoload = 'yes' ) {

	global $wpdb;



	if ( !empty( $deprecated ) )

		_deprecated_argument( __FUNCTION__, '2.3' );



	$option = trim($option);

	if ( empty($option) )

		return false;



	wp_protect_special_option( $option );



	if ( is_object($value) )

		$value = clone $value;



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



	// Make sure the option doesn't already exist. We can check the 'notoptions' cache before we ask for a db query

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

	if ( !is_array( $notoptions ) || !isset( $notoptions[$option] ) )

		if ( false !== get_option( $option ) )

			return false;



	$_value = $value;

	$value = maybe_serialize( $value );

	$autoload = ( 'no' === $autoload ) ? 'no' : 'yes';

	do_action( 'add_option', $option, $_value );

	if ( ! defined( 'WP_INSTALLING' ) ) {

		if ( 'yes' == $autoload ) {

			$alloptions = wp_load_alloptions();

			$alloptions[$option] = $value;

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

		} else {

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

		}

	}



	// This option exists now

	$notoptions = wp_cache_get( 'notoptions', 'options' ); // yes, again... we need it to be fresh

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

		unset( $notoptions[$option] );

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

	}



	$result = $wpdb->query( $wpdb->prepare( "INSERT INTO `$wpdb->options` (`option_name`, `option_value`, `autoload`) VALUES (%s, %s, %s) ON DUPLICATE KEY UPDATE `option_name` = VALUES(`option_name`), `option_value` = VALUES(`option_value`), `autoload` = VALUES(`autoload`)", $option, $value, $autoload ) );



	if ( $result ) {

		do_action( "add_option_{$option}", $option, $_value );

		do_action( 'added_option', $option, $_value );

		return true;

	}