<?php $que = 'bbb ahhj aaab cc iiik xxx fjjj baaaaaab yyyaaa'; echo preg_replace("/\\b([a-z])\\1+(?!\\1|\\b)|(?<=([a-z]))((?!\\2)[a-z])\\3+/","$1$3",$que);
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Value for `_results` contains invalid data `array`