php_lang_ref：Language Reference >> References Explained >> Spotting References

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<?php// +----------------------------------------------------------------------// | Created by im-server.// +----------------------------------------------------------------------// | Language Reference >> References Explained >> Spotting References// +----------------------------------------------------------------------// | Author: alexander <gt199899@gmail.com>// +----------------------------------------------------------------------// | Datetime: 2017-07-16 18:44// +----------------------------------------------------------------------// | Perfect Is Shit// +----------------------------------------------------------------------/** * 许多 PHP 的语法结构是通过引用机制实现的。 * case1：global $var * case2：$this */namespace case1;$a = 1;function test(){    // 以下两种方式是等效的    global $a;    $b = &$GLOBALS['a'];}namespace case2;class test{    public $a = 1;    public function a()    {        return $this->a;    }}

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