<?php $strings = [ '5,422 Comments, other text here and stuff', '2 Comments, not great!', '4/4/2009 21 Comments', 'This one is a whopper: 1,234,567,890 Comments' ]; foreach ($strings as $string) { echo preg_match('~\d{1,3}(?:,\d{3})*(?= Comments)~', $string, $m) ? $m[0] : 'no match'; echo "\n"; }
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