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  1. <?php
  2.  
  3. $value = " Some example here for you ";
  4. $result = preg_replace('/^\S+(?:\s+\S+){2}\K\s+/', ',$0', trim($value), 1);
  5. echo $result;
  6.  
Success #stdin #stdout 0s 82624KB
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Standard input is empty
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Some example here, for you
https://ideone.com/NFcBSL
language:
PHP (php 7.3.5)
created:
6 years ago
visibility:
secret

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