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  1. <?php
  2. $string = 'hello';
  3. echo preg_replace('/he(l)l(o)/', '$0, $1, $2', $string);
Success #stdin #stdout 0.01s 20520KB
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Standard input is empty
stdout
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hello, l, o
https://ideone.com/o8fTAw
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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