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@ 2014-02-06T13:51:09Z

<?php
$text = '[CODE]&lt;td align=&quot;$stylevar[right]&quot;&gt;[/CODE]';
$result = preg_replace('#\[(right)\](((?R)|[^[]+?|\[)*)\[/\\1\]#siU', '', $text);
var_dump($text);
var_dump($result);

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

37.01 ms | 402 KiB | 5 Q