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  1. <?php
  2. $s = 'CBE2CBA1B7BFBCEDBEEC';
  3. $p = '/(..)/';
  4. $r = '%$1';
  5. echo preg_replace($p, $r, $s);
  6. ?>
  7.  
Success #stdin #stdout 0.02s 13112KB
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%CB%E2%CB%A1%B7%BF%BC%ED%BE%EC
https://ideone.com/zyq6S
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
secret

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