<?php if (!preg_match('#((?<year>\d+)\s+year(s)?(,\s+)?)?((?<week>\d+)\s+week(s)?(,\s+)?)?((?<day>\d+)\s+day(s)?(,\s+)?)?((?<hour>\d+)\s+hour(s)?(,\s+)?)?((?<minute>\d+)\s+minute(s)?(,\s+)?)?((?<second>\d+)\s+second(s)?)?#', '21 minutes, 34 seconds', $match)) { var_dump($match); }
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