php中自定义类文件自动加载

function __autoload($class){include 'lib/'.$class.'.class.php';}$User=new User();

function A($class){include 'lib/'.$class.'.class.php';}spl_autoload_register('A');$User= new User();

class A{    public function Aauto($class){    include 'lib/'.$class.'.class.php';    }}$A=new A();sql_autoload_register(array($A,'Aauto'));$User= new User();

class A{    public function Aauto($class){    include 'lib/'.$class.'.class.php';    }}sql_autoload_register(array('A','Aauto'));$User= new User();

class A{    public function Aauto($class){    include 'lib/'.$class.'.class.php';    }}sql_autoload_register(array('A::Aauto'));$User= new User();