<?php $words = "systematic,gear,synthesis,mysterious"; $words=explode(",",$words); $your_array = preg_grep('~(?=[^s]*s)(?=[^m]*m)(?=[^e]*e)~', $words);; foreach ($words as $w) { if (strpos($w, array('s', 'e', 'm')) == 0) { echo $w; } } print_r($your_array);
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