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  1. <?php
  2. $str = 'Текст >>123 текст и ещё текст';
  3.  
  4. $newStr = preg_replace('/>>(\d+)/i', '<a href="#\\1">>>\\1</a>', $str);
  5.  
  6. print $newStr;
Success #stdin #stdout 0.02s 52432KB
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Standard input is empty
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Текст <a href="#123">>>123</a> текст и ещё текст
https://ideone.com/kJuqcK
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
secret

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