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  1. <?php
  2.  
  3. $string = 'жышышышыдыдыжыжыжыж ы';
  4. $result = preg_replace('/(ж|ш)(ы)/', '$1[$2]', $string);
  5. echo $result;
Success #stdin #stdout 0.01s 20568KB
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Standard input is empty
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ж[ы]ш[ы]ш[ы]ш[ы]дыдыж[ы]ж[ы]ж[ы]ж ы
https://ideone.com/1w3yzQ
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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