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  1. <?php
  2.     $str='a a a b b b c c c';
  3.     $regex = array('/\b(a)\b\s*/', '/\b(b)\b\s*/', '/\b(c)\b\s*/');
  4.     $repl = array('{\1}', '<\1>', '{\1}');
  5.  
  6.     $nstr = preg_replace($regex, $repl, $str);
  7.     echo "$nstr\n";
  8. ?>
Success #stdin #stdout 0.01s 20520KB
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{a}{a}{a}<b><b><b>{c}{c}{c}
https://ideone.com/gxa3pg
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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