Home > Backend Development > PHP Tutorial > 如果让一个对象,可以通过数组模式 和 对象模式 访问其成员属性; 100分

如果让一个对象,可以通过数组模式 和 对象模式 访问其成员属性; 100分

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Release: 2016-06-23 13:39:27
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class a{
public $aaa=1;

}

$a=new a();
echo $a->aaa;  //1
同时可以直接:
echo $a['aaa']; //1
  
在PDO中,可以 $db->fetch(PDO::FETCH_LAZY)来实现,这可以说明,PHP是可以做到上述结果的; 请问具体是如何实现的?
求原理,谢谢;


回复讨论(解决方案)

<?php$a = new ArrayObject();$a->b = 1;$a['b'] = 2;echo $a->b;echo $a['b'];
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ArrayObject可以继承,但不允许子类有方法,具体的看手册吧我也不清楚...
说句题外话没恶意,我感觉这玩意没意义...

要写个方法实现。

class a{    public $aaa=1;    function fetch($type){        if($type=='assoc'){            $ret = new stdClass();            $ret->aaa = $this->aaa;        }elseif($type=='array'){            $ret = array();            $ret['aaa'] = $this->aaa;        }        return $ret;    }}$d = new a();$obj = $d->fetch('assoc');var_dump($obj);$arr = $d->fetch('array');var_dump($arr);
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object(stdClass)[2]  public 'aaa' => int 1array (size=1)  'aaa' => int 1
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