我有一个类,它有一个在数据库中检查和创建表的函数。为了做到这一点,我需要使用WordPress$wpdb对象。
我需要只在第一次激活插件时运行该函数,因此我使用该函数:
register_activation_hook ( __FILE__, array( \'MemorialCandles\', \'dbInstall\' ) );
问题是,我总是会遇到以下错误:
致命错误:当不在/home/xxx/xxx/wordpress/wp-content/plugins/memorialcands/memorialcands中的对象上下文中时,使用$this。班php第77行
the class code:
<?php
// Global Variables:
global $wpdb;
register_activation_hook ( __FILE__, array( \'MemorialCandles\', \'dbInstall\' ) );
/**
* Class: MemorialCandles
*
* Provides skeleton to the plugin and handles queries and action.
*
* @author Dor Zuberi <[email protected]>
* @copyright 2011 Dor Zuberi
* @license http://www.php.net/license/3_01.txt
*/
class MemorialCandles
{
// Variables
/**
* @var string stores plugin direction - RTL or LTR.
*/
private $pluginDirection;
/**
* @var string stores the plugin database table name.
*/
private $tableName;
// Constructor
/**
* Initiates the plugin, stores and configure the basic setup procedures.
*
* @return void
*/
function __construct()
{
global $wpdb;
$this->tableName = $wpdb->prefix . \'memorialcandles\';
}
// Getters
// Setters
// Methods
/**
* Handles the database table creation.
*
* @return void
*/
function dbInstall()
{
global $wpdb;
if( $wpdb->get_var( "SHOW TABLES LIKE `{$this->tableName}`" ) != $this->tableName )
{
$sql = "CREATE TABLE `{$this->tableName}` (
id int(8) NOT NULL AUTO_INCREMENT,
fullName text NOT NULL,
message text NOT NULL,
postDate text NOT NULL,
galleryID int(8) NOT NULL,
UNIQUE KEY id(id)
);";
require_once( ABSPATH . \'wp-admin/includes/upgrade.php\' );
dbDelta( $sql );
}
}
/**
* Handles the database table drop procedure.
*
* @return void
*/
function dbUninstall()
{
global $wpdb;
$sql = "DROP TABLE IF EXISTS `{$this->tableName}`;";
$wpdb->query( $sql );
}
}
?>
提前感谢!:D