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  1. <?php
  2. function do_universal_inn_check($inn) {
  3.                 if(!is_numeric($inn)) return false;
  4.                 $weights = array(3,7,2,4,10,3,5,9,4,6,8,0);
  5.                 $chr = str_split((string)$inn);
  6.                 switch (strlen($inn)) {
  7.                         case 12:
  8.                         //do first 11 digits cksum
  9.                         $cksum_one = 0;
  10.                         for($i=0;$i<11;$i++) $cksum_one += $weigths[$i+1] * $chr[$i];
  11.                         $cksum_one %= 11;
  12.                         if($cksum_one > 9) $cksum_one %= 10;
  13.                         //do entire INN
  14.                         $cksum_two = 0;
  15.                         for($i=0;$i<12;$i++) $cksum_two += $weights[$i] * $chr[$i];
  16.                         $cksum_two %= 11;
  17.                         if($cksum_two > 9) $cksum_two %= 10;
  18.                         return (((int)$chr[10] === (int)$cksum_one) && ((int)$chr[11] === (int)$cksum_two)) ? true : false;
  19.                         break;
  20.                 case 10:
  21.                         $cksum = 0;
  22.                         for($i=0;$i<10;$i++) $cksum += (int)$weights[$i+2] * (int)$chr[$i];
  23.                         $cksum %= 11;
  24.                         if($cksum > 9) $cksum %= 9;
  25.                         return ((int)$chr[9] === (int)$cksum) ? true : false;
  26.                         break;
  27.                 default:
  28.                         // ne byvaet takih INN SOOKAA
  29.                         return false;
  30.                         break;
  31.                 }
  32.  
  33.      return false;
  34.   }
  35.  
  36. // test
  37. // invalid 10 int inn
  38. echo var_dump(do_universal_inn_check(7743013902));
  39. // valid VEKTOR LTD LPP PZDC GMBH
  40. echo var_dump(do_universal_inn_check(5702001741));
  41.  
Success #stdin #stdout 0.02s 52472KB
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bool(false)
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https://ideone.com/oMl5pc
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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