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  1. <?php
  2.  
  3. $str = '12-345-67-89-10';
  4. echo $str, PHP_EOL;
  5. echo preg_replace('/-/', '!', $str, 2), PHP_EOL;
  6. echo strrev(preg_replace('/-/', '!', strrev($str), 2)), PHP_EOL;
  7.  
Success #stdin #stdout 0s 82944KB
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stdin
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Standard input is empty
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12-345-67-89-10
12!345!67-89-10
12-345-67!89!10
https://ideone.com/CYWUuB
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
secret

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