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  1. <?php
  2.  
  3. $re = '/\b([WL])(2[5-9]|3[0-9]|4[0-4])\b/'; 
  4. $str = "W28\nL36\nW29-L32"; 
  5. $result = preg_replace($re, "$2$1", $str);
  6. echo $result;
Success #stdin #stdout 0.03s 52480KB
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28W
36L
29W-32L
https://ideone.com/vv54uc
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
secret

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