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@ 2014-08-27T05:10:53Z

<?php

$s = '$name = "foo"; My name is foo';

$r = preg_replace('/foo(?!")/', 'VARIABLE', $s);

var_dump($r);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
preg_replace: documentation ( source)

preferences:dark modelive preview

35.21 ms | 402 KiB | 5 Q