class_alias--为一个类创建别名

bool class_alias ( string $original , string $alias [, bool $autoload = TRUE ] )

基于用户定义的类 original 创建别名 alias。这个别名类和原有的类完全相同。

成功时返回 TRUE，或者在失败时返回 FALSE。

<?php
class Person{
    public $username;
    public $age;
    public $height;
    public $weight;

    public function __construct($username,$age,$height,$weight){
        $this->username = $username;
        $this->age = $age;
        $this->height = $height;
        $this->weight = $weight;
    }
    public function __set($name,$value){
        $this->$name = $value;
    }

    public function __get($name){
        return $this->$name;
    }

    public function __toString(){
        return '';
    }
}
class_alias('Person','Pepole');
$p_person = new Person('zhaofei',23,185,72);
var_dump($p_person);

$p_pepole = new Pepole('xiaoming',27,175,62);
var_dump($p_pepole);
// the objects are the same
var_dump($p_person == $p_pepole, $p_person === $p_pepole);
var_dump($p_person instanceof $p_pepole);

// the classes are the same
var_dump($p_person instanceof Person);
var_dump($p_person instanceof Pepole);

var_dump($p_pepole instanceof Person);
var_dump($p_pepole instanceof Pepole);