<?php $str = "The game start in a minute, remove all of the corks from these bottles in the cellar they're in"; $useless_words = ["the", "of", "or", "in", "a"]; var_dump( preg_replace('/(\s+)?\b(?:' . implode('|', $useless_words) . ')\b(?(1)|\s+)/i', '', $str) );
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