public static function getInstance()
{
if (is_null(self::$_instance)) {
self::$_instance = new Singleton();
}
return self::$_instance;
}
public static function getInstance()
{
if (self::$_instance === NULL) {
self::$_instance = new Singleton();
}
return self::$_instance;
}
public static function getInstance()
{
if (!self::$_instance instanceof self) {
self::$_instance = new self();
}
return self::$_instance;
}
public static function init()
{
if (self::$_instance == null) {
self::$_instance = new self();
}
return self::$_instance;
}
public static function getInstance()
{
if (!self::$_instance instanceof self) {
//instanceof用于检测对象与类的从属关系,is_subclass_of对象所属类是否类的子类
self::$_instance = new self();
}
return self::$_instance;
}
static function getInstance()
{
if (self::$_instance == null) {
self::$_instance = new Singleton();
} else {
return self::$_instance;
}
}
/**
* 获得实例
* @return null
*/
public static function getInstance()
{
$class = __CLASS__;
if (!self::$_instance instanceof $class) {
return self::$_instance = new $class();
}
return self::$_instance;
}
/**
* Сброс инстанции
*
* @static
* @return void
*/
public static function reset()
{
self::$_instance = NULL;
}
