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@ 2017-03-02T08:10:10Z

<?php

const SDFH=2;

class A{
    public function sdfh(){
        echo 'asdgf';
    }
}

$a= new A();
$b=SDFH;
var_dump($a->{$b});

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

50.38 ms | 402 KiB | 5 Q