/**
* Add a new option.
*
* You do not need to serialize values. If the value needs to be serialized, then
* it will be serialized before it is inserted into the database. Remember,
* resources can not be serialized or added as an option.
*
* You can create options without values and then update the values later.
* Existing options will not be updated and checks are performed to ensure that you
* aren't adding a protected WordPress option. Care should be taken to not name
* options the same as the ones which are protected.
*
* @since 1.0.0
*
* @global wpdb $wpdb
*
* @param string $option Name of option to add. Expected to not be SQL-escaped.
* @param mixed $value Optional. Option value. Must be serializable if non-scalar. Expected to not be SQL-escaped.
* @param string $deprecated Optional. Description. Not used anymore.
* @param string|bool $autoload Optional. Whether to load the option when WordPress starts up.
* Default is enabled. Accepts 'no' to disable for legacy reasons.
* @return bool False if option was not added and true if option was added.
*/
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] ) )
/** This filter is documented in wp-includes/option.php */
if ( apply_filters( 'default_option_' . $option, false ) !== get_option( $option ) )
return false;
$serialized_value = maybe_serialize( $value );
$autoload = ( 'no' === $autoload || false === $autoload ) ? 'no' : 'yes';
/**
* Fires before an option is added.
*
* @since 2.9.0
*
* @param string $option Name of the option to add.
* @param mixed $value Value of the option.
*/
do_action( 'add_option', $option, $value );
$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, $serialized_value, $autoload ) );
if ( ! $result )
return false;
if ( ! defined( 'WP_INSTALLING' ) ) {
if ( 'yes' == $autoload ) {
$alloptions = wp_load_alloptions();
$alloptions[ $option ] = $serialized_value;
wp_cache_set( 'alloptions', $alloptions, 'options' );
} else {
wp_cache_set( $option, $serialized_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', $notoptions, 'options' );
}
/**
* Fires after a specific option has been added.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 2.5.0 As "add_option_{$name}"
* @since 3.0.0
*
* @param string $option Name of the option to add.
* @param mixed $value Value of the option.
*/
do_action( "add_option_{$option}", $option, $value );
/**
* Fires after an option has been added.
*
* @since 2.9.0
*
* @param string $option Name of the added option.
* @param mixed $value Value of the option.
*/
do_action( 'added_option', $option, $value );
return true;
}
