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  1. <?php
  2.  
  3. function generateEANdigit($code)
  4. {
  5.   $weightflag = true;
  6.   $sum = 0;
  7.   for ($i = strlen($code) - 1; $i >= 0; $i--) {
  8.     $sum += (int)$code[$i] * ($weightflag?3:1);
  9.     $weightflag = !$weightflag;
  10.   }
  11.   return (10 - ($sum % 10)) % 10;
  12. }
  13.  
  14. echo generateEANdigit('789100031550');
Success #stdin #stdout 0.02s 23508KB
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7
https://ideone.com/16jW76
https://pt.stackoverflow.com/questions/310710
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
secret

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