private static $_instance;
private function __construct()
{
}
private static function get_instance()
{
if(!isset(self::$_instance)){
self::$_instance = new self();
}else{
return self::$_instance;
}
}
//阻止clone
private function __clone()
{
trigger_error('Clone is not allow', E_USER_ERROR);
}
function test()
{
echo "test";
}
}
$test = man::get_instance();
$test->test();
?>
