动作钩子：：在删除选项之前立即触发。
参数（Parameters）
| 参数 | 类型 | 说明 |
|---|---|---|
| $option | （string） | 要删除的选项的名称。 |
源码（Source）
/**
* Removes option by name. Prevents removal of protected WordPress options.
*
* @since 1.2.0
*
* @global wpdb $wpdb
*
* @param string $option Name of option to remove. Expected to not be SQL-escaped.
* @return bool True, if option is successfully deleted. False on failure.
*/
function delete_option( $option ) {
global $wpdb;
$option = trim( $option );
if ( empty( $option ) )
return false;
wp_protect_special_option( $option );
// Get the ID, if no ID then return
$row = $wpdb->get_row( $wpdb->prepare( "SELECT autoload FROM $wpdb->options WHERE option_name = %s", $option ) );
if ( is_null( $row ) )
return false;
/**
* Fires immediately before an option is deleted.
*
* @since 2.9.0
*
* @param string $option Name of the option to delete.
*/
do_action( 'delete_option', $option );
$result = $wpdb->delete( $wpdb->options, array( 'option_name' => $option ) );
if ( ! defined( 'WP_INSTALLING' ) ) {
if ( 'yes' == $row->autoload ) {
$alloptions = wp_load_alloptions();
if ( is_array( $alloptions ) && isset( $alloptions[$option] ) ) {
unset( $alloptions[$option] );
wp_cache_set( 'alloptions', $alloptions, 'options' );
}
} else {
wp_cache_delete( $option, 'options' );
}
}
if ( $result ) {
/**
* Fires after a specific option has been deleted.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 3.0.0
*
* @param string $option Name of the deleted option.
*/
do_action( "delete_option_$option", $option );
/**
* Fires after an option has been deleted.
*
* @since 2.9.0
*
* @param string $option Name of the deleted option.
*/
do_action( 'deleted_option', $option );
return true;
}
return false;
}更新版本源码位置使用被使用2.9.0wp-includes/option.php:58410
