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PHP Example of ISO 7064 Mod 11,2 or Modulus 11,2 of the norm ISO/IEC 7064. Is is not very used, that's why I am sharing.
<?php
class Iso7064mod112 {
public $code;
public function encode($code) {
$this->code = $code;
$c = $this->computeCheck($this->code);
if ($c == 10) {
return $this->code . "X";
} else {
return $this->code . $c;
}
}
public function verify($code) {
$this->code = $code;
return (computeCheck(substr($this->code, 0, -1)) == getCheckDigit($this->code));
}
public function computeCheck($str) {
$p = 0;
for ($i = 0; $i < strlen($str); $i++) {
$c = $str[$i];
$p = 2 * ($p + $c);
}
$p %= 11;
return (12 - $p) % 11;
}
public function getCheckDigit($str) {
$c = substr($str, -1);
if ($c == 'X' || $c == 'x') {
return 10;
} else {
return $c;
}
}
}
?>
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