delete_option()删除wp_option表中的选项/值对

目录

描述

译文

这是一种从选项数据库表中删除某一有名称的选项/值对的安全方法。

原文

A safe way of removing a named option/value pair from the options database table.

delete_option() 描述

用法

<?php delete_option$option ); ?>

delete_option() 用法

参数

$option

(string) (必填) Name of the option to be deleted. A list of valid default options can be found at the Option Reference.

默认值: None

delete_option() 参数

历史

添加于 版本: 1.2.0

delete_option() 历史

源文件

delete_option() 函数的代码位于 wp-includes/option.php.

/* ----------------------------------
 * wordpress之魂 © http://wphun.com
 * ---------------------------------- */
/**
 * 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;
}

delete_option() 源文件

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