Php -开发Wordpress插件
我正在开发我的第一个Wordpress插件，就目前而言，它应该做的就是：
- 安装时:创建表。
我的守则：
if ( ! class_exists ( 'My_Plugin' ) )
{
class My_Plugin
{
/**
* Construct the plugin object
**/
public function __construct ()
{
// register actions
}
/**
* Activate the plugin
**/
public static function activate ()
{
global $wpdb;
$tableName = tableName ( $wpdb );
if ( ! tableExists ( $wpdb , $tableName ) )
{
$sql = "CREATE TABLE " . $tableName . " (
id INT(9) UNSIGNED NOT NULL AUTO_INCREMENT,
any_column VARCHAR(255) NOT NULL,
UNIQUE KEY id (id)
);";
require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
dbDelta($sql);
}
}
/**
* Deactivate the plugin
**/
public static function deactivate ()
{
// Nothing
}
// Return table name
public function tableName ( $wpdb , $tableName = 'new_table' )
{
$tableName = $wpdb->prefix . $tableName;
return $tableName;
}
// Check if table already exists
public function tableExists ( $wpdb , $tableName )
{
try
{
$result = $wpdb->query("SELECT 1 FROM $tableName LIMIT 1");
}
catch ( Exception $e )
{
return FALSE;
}
return $result !== FALSE;
}
}
}
if ( class_exists ( 'My_Plugin' ) )
{
// Activation and Deactivation hooks
register_activation_hook ( __FILE__ , array ( 'My_Plugin' , 'activate' ) );
register_deactivation_hook ( __FILE__ , array ( 'My_Plugin' , 'deactivate' ) );
// Instantiate the plugin class
$plugin_template = new My_Plugin ();
}但是返回此错误：
Fatal error: Call to undefined function tableName() in /www/htdocs/path/to/file.php on line但是我看不出我的错误，我真的不知道为什么这个函数是undefined...anybody可以帮我这个忙？
你好！！
回答 2
Stack Overflow用户
发布于 2014-12-25 02:09:14
tableName()不是全局函数，它是My_Plugin的一种方法。简单的方法是将activate()和deactivate()转换为非静态函数，并使用$this->tableName().
// Instantiate the plugin class
$plugin_template = new My_Plugin ();
register_activation_hook ( __FILE__ , array ( $plugin_template , 'activate' ) );
register_deactivation_hook ( __FILE__ , array ( $plugin_template , 'deactivate' ) );和
public function activate ()
{
global $wpdb;
$tableName = $this->tableName ( $wpdb );
if ( ! $this->tableExists ( $wpdb , $tableName ) )
{
$sql = "CREATE TABLE " . $tableName . " (
id INT(9) UNSIGNED NOT NULL AUTO_INCREMENT,
any_column VARCHAR(255) NOT NULL,
UNIQUE KEY id (id)
);";
require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
dbDelta($sql);
}
}否则，您将需要在您的My_Plugin中构造一个新的activate()实例，然后通过它- $class->tableName()来访问它。
您可以查看手册以获得更多信息。
Stack Overflow用户
发布于 2014-12-25 04:25:11
插件激活中创建表的函数
register_activation_hook( __FILE__，'create_table‘)；
function create_tabletag() { require_once(ABSPATH . 'wp-admin/includes/upgrade.php'); $query="CREATE TABLE IF NOT EXISTS tab_list( tab_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, name VARCHAR(40), isvisible VARCHAR(20) )ENGINE = MYISAM CHARACTER SET utf8 COLLATE utf8_general_ci;"; dbDelta($query); //This function use to create table }
https://stackoverflow.com/questions/27643675
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