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  1. <?php
  2.  
  3. $string = "box.last_rollout_revision = dummy";
  4.  
  5. $regex = "/(box\.last_rollout_revision[\s]*=[\s]*)[a-z0-9-_]*([\n]*)/";
  6.  
  7. $test = "234";
  8. $replacementPattern = '${1}'.$test.'$2';
  9.  
  10. echo preg_replace($regex,$replacementPattern,$string);
Success #stdin #stdout 0.03s 52480KB
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box.last_rollout_revision = 234
https://ideone.com/Q0fJZm
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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