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  1. <?php
  2.  
  3. error_reporting(-1);
  4.  
  5. $text = 'abc   123   _';
  6. $hex= bin2hex($text);
  7. $hex = preg_replace('/.{2}/', '$0 ', $hex); // разобьем пробелами для удобства
  8. echo $hex;
Success #stdin #stdout 0.01s 20568KB
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stdin
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Standard input is empty
stdout
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61 62 63 20 20 20 31 32 33 20 20 20 5f
https://ideone.com/Q5yU4y
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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