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@ 2015-05-11T11:46:03Z

<?php

class X{
    
    protected $y;
    
    function __set($name, $value){
        $this->y = $value * 2;
    }
}

$x = new X;
$y = $x->bar = 20;
var_dump($y);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

53.02 ms | 402 KiB | 5 Q