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added a function for validating International Bank Account Numbers (IBANs).

This commit is contained in:
Marcel Naeve 2016-05-13 14:09:43 +02:00
parent d62709cb51
commit fd5b05cffd
1 changed files with 51 additions and 0 deletions
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51
Validate.php
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@ -101,4 +101,55 @@ class Validate
return ($value >= $min && $value <= $max);
}
/**
* Static function for validating a IBAN (International Bank Account Number).
* @param string $iban International Bank Account Number
* @return bool is the IBAN valid?
*/
static function iban(string $iban) : bool
{
$country_length = [
"AL" => 28, "AD" => 24, "AT" => 20, "AZ" => 28, "BH" => 22, "BE" => 16, "BA" => 20, "BR" => 29, "BG" => 22, "CR" => 21,
"HR" => 21, "CY" => 28, "CZ" => 24, "DK" => 18, "DO" => 28, "TL" => 23, "EE" => 20, "FO" => 18, "FI" => 18, "FR" => 27,
"GE" => 22, "DE" => 22, "GI" => 23, "GR" => 27, "GL" => 18, "GT" => 28, "HU" => 28, "IS" => 26, "IE" => 22, "IL" => 23,
"IT" => 27, "JO" => 30, "KZ" => 20, "XK" => 20, "KW" => 30, "LV" => 21, "LB" => 28, "LI" => 21, "LT" => 20, "LU" => 20,
"MK" => 19, "MT" => 31, "MR" => 27, "MU" => 30, "MC" => 27, "MD" => 24, "ME" => 22, "NL" => 18, "NO" => 15, "PK" => 24,
"PS" => 29, "PL" => 28, "PT" => 25, "QA" => 29, "RO" => 24, "SM" => 27, "SA" => 24, "RS" => 22, "SK" => 24, "SI" => 19,
"ES" => 24, "SE" => 24, "CH" => 21, "TN" => 24, "TR" => 26, "AE" => 23, "GB" => 22, "VG" => 24
];
$iban = mb_ereg_replace("/\s\-/", "", $iban); // sanitize for validation (remove spaces)
$country = mb_strtoupper(mb_substr($iban, 0, 2));
// we know the country the IBAN belongs to?
if(isset($country_length[$country])) {
// The IBAN matches in length and basic structure?
$matches = null;
if(mb_ereg_match('/^([A-Za-z]{2})(\d{2})([A-Za-z0-9]{' . $country_length[$country] . '})$/', $iban, $matches)) {
$checkNum = $matches[1];
$bban = strtoupper($matches[2]);
// Replace letters with digits (a or A => 11, b or B => 12,..)
$checkString = mb_ereg_replace_callback('/[A-Z]/', function ($matches) {
return base_convert($matches[0], 36, 10);
}, $bban . $country . '00');
$int_iban = intval($checkString); // remove leading zeros by converting to int.
// calculate check number of IBAN and convert to string of length 2.
$calc_checkNum = 98 - bcmod($int_iban, 97);
$calc_checkNum = ($calc_checkNum < 10 ? "0$calc_checkNum" : "$calc_checkNum");
// Invalid if check number is not the same as the calculated one.
if ($calc_checkNum !== $checkNum) return false;
}
else
return false;
}
return true;
}
}