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@ 2016-03-14T21:35:22Z

<?php
$var = '$test = null';
if(preg_match($var,'/\s{0,2}=\s{0,2}null/gi'))
 echo "MATCH";

Output
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preg_match: documentation ( source)

preferences:dark modelive preview

27.37 ms | 402 KiB | 5 Q