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<?php $wordlist = 'systematic,gear,synthesis,mysterious'; $words = explode(',', $wordlist); foreach($words as $word) { if (preg_match('~(?=[^s]*s)(?=[^m]*m)(?=[^e]*e)~', $word)) echo '<br/>' . $word; } ?>
Output for git.master, git.master_jit, rfc.property-hooks
<br/>systematic<br/>mysterious

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