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  1. <?php
  2.  
  3.    $string = 'AAACDEAAAABBBUUDD';
  4.  
  5.    $bold = preg_replace( '/(.)\1{2,}/', '<b>$0</b>' , $string );
  6.  
  7.    echo $bold;
Success #stdin #stdout 0.01s 82944KB
comments (?)
stdin 
Standard input is empty
stdout 
<b>AAA</b>CDE<b>AAAA</b><b>BBB</b>UUDD
https://ideone.com/jxPOax
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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