功能:
delete_option()函数的功能是删除wp_options表中指定的一条数据。
参数:
$option
(string) (必选的) 要删除的选项表记录名称
默认: 无
返回值:
(boolean)
如果成功删除记录就返回True,删除失败或者记录不存在就返回false
所在位置:
delete_option() 函数包含在 wp-includes/option.php 中。
源码:
delete_option()函数源码
/**
* Removes option by name. Prevents removal of protected WordPress options.
*
* @since 1.2.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @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 ( ! 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;
}
示例:
相关函数:
add_option()
get_option()
update_option()
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