(PHP 5 >= 5.3.0)
class_alias — Creates an alias for a class
Creates an alias named alias based on the defined class original. The aliased class is exactly the same as the original class.
The original class.
The alias name for the class.
成功时返回 TRUE， 或者在失败时返回 FALSE.
Example #1 class_alias() example
<?php
class foo { }
class_alias('foo', 'bar');
$a = new foo;
$b = new bar;
// the objects are the same
var_dump($a == $b, $a === $b);
var_dump($a instanceof $b);
// the classes are the same
var_dump($a instanceof foo);
var_dump($a instanceof bar);
var_dump($b instanceof foo);
var_dump($b instanceof bar);
?>
以上例程会输出：
bool(true) bool(false) bool(true) bool(true) bool(true) bool(true) bool(true)