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  1. <?php
  2.  
  3. $re = "/bob/"; 
  4. $str = "joe,bob,luis,sancho,bob,marco,lura,hannah,bob,marco,luis"; 
  5. echo $result = preg_replace($re, 'found it!', $str, 1);
Success #stdin #stdout 0.02s 52432KB
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joe,found it!,luis,sancho,bob,marco,lura,hannah,bob,marco,luis
https://ideone.com/nmRf9j
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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