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@ 2014-05-13T09:24:40Z

<?php

class Test
{
	protected $attr = 123;

    public function attrTest($attr)
    {
		return $this->$attr;
    }
}

$bla = new Test();

var_dump($bla->attrTest('attr'));

Output
Performance
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References
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var_dump: documentation ( source)

preferences:dark modelive preview

35.25 ms | 402 KiB | 5 Q