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  1. <?php
  2.  
  3. $re = '/(?<=\D|^)\d{1,2}[wdhm]\b/'; 
  4. $str = "11w 22d 33h 44m\n"; 
  5. echo preg_match($re, $str, $matches);
Success #stdin #stdout 0.02s 24192KB
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https://ideone.com/RhC6hI
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
secret

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