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  1. <?php
  2.  
  3. $rawsubject = 'RE: [#4152] - Registration Issues';
  4.  
  5. if (preg_match('/\d+(?=\])/', $rawsubject, $matches)) {
  6.     $casenumber = $matches[0];
  7.     echo "$casenumber\n";
  8. }
  9.  
  10. if (preg_match('/\[#(\d+)\]/', $rawsubject, $matches)) {
  11.     $casenumber = $matches[1];
  12.     echo "$casenumber\n";
  13. }
Success #stdin #stdout 0.02s 13112KB
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4152
4152
https://ideone.com/cKYTj
language:
PHP (php 7.3.5)
created:
13 years ago
visibility:
public

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