spl_autoload_call()

(PHP 5 >= 5.1.0, PHP 7)

尝试调用所有已注册的__autoload()函数来装载请求类

说明

spl_autoload_call(string $class_name): void

可以直接在程序中手动调用此函数来使用所有已注册的__autoload函数装载类或接口。

参数

$class_name

搜索的类名。

返回值

没有返回值。

It should be noted, that calling spl_autoload_call on a child class, and then on its parent class, throws a fatal error.
This happens because autoloading the child class also loads the class it extends. And since spl_autoload_call forcibly calls the registered autoload function(s), not taking into account whether the class exists, a fatal error is thrown:
File: child.class.php
<?php
class Child extends Parent () {
  public function __construct () {
    parent::__construct();
  }
}
?>
File: parent.class.php
<?php
class Parent () {
  public function __construct () {
  }
}
?>
File: autoload.php
<?php
/*  works fine  */
  spl_autoload_call('Child');
/*  throws: Fatal error: Cannot redeclare class Parent in /parent.class.php on line 2  */
  spl_autoload_call('Parent');
?>