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  1. <?php
  2.  
  3. echo preg_replace('#\b(?:ab)+\b#', '!', 'ab abab abab abababab abea');
Success #stdin #stdout 0s 82944KB
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Standard input is empty
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! ! ! ! abea
https://ideone.com/eKqTER
language:
PHP (php 7.3.5)
created:
6 years ago
visibility:
public

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