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@ 2014-09-17T14:04:03Z

<?php
class A
{
  const test = 'test';
}

$b = 'test';
$comp = "A::{$b}";

var_dump($comp, constant($comp));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
constant: documentation ( source)

preferences:dark modelive preview

37.74 ms | 402 KiB | 5 Q