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<?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($result);
Output for git.master, git.master_jit, rfc.property-hooks
string(58) "[CODE]&lt;td align=&quot;$stylevar[right]&quot;&gt;[/CODE]" string(58) "[CODE]&lt;td align=&quot;$stylevar[right]&quot;&gt;[/CODE]"

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