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  1. <?php
  2.  
  3. $i = 123456;
  4. $ar = unpack("C*", pack("C*", $i));
  5.  
  6. print_r($ar);
Success #stdin #stdout 0.04s 25536KB
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stdin
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Standard input is empty
stdout
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Array
(
    [1] => 64
)
https://ideone.com/NCdgsk
language:
PHP (php 7.3.5)
created:
3 hours ago
visibility:
public

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