IBAN Validator

IBAN validator class. Validates all EU countries and dumps extracted account info. Additionally, for banks in Slovak Republic returns also corresponding SWIFT code.

Enter valid IBAN number to see some extracted data:

Example - valid IBANs (SK): SK 52 8130 0000 0020 0026 0100 or SK1611110000001000229002

/**
* IBAN validator class
* Based on partially on http://stackoverflow.com/questions/20983339/validate-iban-php
*/
class IbanValidator
{
	/**
	* Examined current IBAN code, e.g. SK8309000000000321654777
	*/
	protected $iban;

	/**
	* TRUE if supplied IBAN is valid
	*/
	protected $valid;

	/**
	* Defined list of expected IBAN string length for each EU country (without whitespaces)
	*/
	protected $countries = array(
		'al'=>28,'ad'=>24,'at'=>20,'az'=>28,'bh'=>22,'be'=>26,
		'ba'=>20,'br'=>29,'bg'=>22,'cr'=>21,'hr'=>21,'cy'=>28,
		'cz'=>24,'dk'=>18,'do'=>28,'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,'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
	);

	/**
	* Mapping of characters to numbers included inside IBAN string - for modulo 97
	*/
	protected $chars = array(
		'a'=>10,'b'=>11,'c'=>12,'d'=>13,'e'=>14,'f'=>15,'g'=>16,
		'h'=>17,'i'=>18,'j'=>19,'k'=>20,'l'=>21,'m'=>22,'n'=>23,
		'o'=>24,'p'=>25,'q'=>26,'r'=>27,'s'=>28,'t'=>29,'u'=>30,
		'v'=>31,'w'=>32,'x'=>33,'y'=>34,'z'=>35
	);

	/**
	* Swift codes mapped to bank numeric SK codes
	*/
	protected $swift = array(
		// Note: replace with your own country-specific bank codes
		'0200' => 'SUBASKBX','0900' => 'GIBASKBX','0720' => 'NBSBSKBX',
		'1100' => 'TATRSKBX','1111' => 'UNCRSKBX','3000' => 'SLZBSKBA',
		'3100' => 'LUBASKBX','5200' => 'OTPVSKBX','5600' => 'KOMASK2X',
		'5900' => 'PRVASKBA','6500' => 'POBNSKBA','7300' => 'INGBSKBX',
		'7500' => 'CEKOSKBX','7930' => 'WUSTSKBA','8050' => 'COBASKBX',
		'8100' => 'KOMBSKBA','8120' => 'BSLOSK22','8130' => 'CITISKBA',
		'8150' => 'ABNASKBX','8170' => 'KBSPSKBX','8160' => 'EXSKSKBX',
		'8180' => 'SPSRSKBA','8320' => 'JTBPSKBA','8330' => 'FIOZSKBA',
		'8360' => 'BREXSKBX','8370' => 'OBKLSKBA','8410' => 'RIDBSKBX',
		'8420' => 'BFKKSKBB','8430' => 'KODBSKBX','9951' => 'XBRASKB1',
		'9952' => 'TPAYSKBX',
	);

	/**
	* IBAN string, e.g. SK16 1111 0000 0010 0022 9002
	* @param string $iban e.g. SK31 1200 0000 1987 4263 7541 or SK5281300000002000260100
	*/
	public function __construct($iban)
	{
		$this->iban = $iban;
	}

	/**
	* Shortcut for one-time static validation
	* @param string $iban e.g. SK31 1200 0000 1987 4263 7541 or SK5281300000002000260100
	*/
	public static function validateOnce($iban)
	{
		$validator = new \IbanValidator($iban);
		return $validator->isValid();
	}

	/**
	* Return TRUE is IBAN is valid, otherwise FALSE
	*/
	public function isValid()
	{
		if($this->valid === null){
			$this->valid = false;
			$this->iban = strtolower(str_replace(' ','',$this->iban));
			$code = substr($this->iban,0,2);
			if(array_key_exists($code, $this->countries)
				&& strlen($this->iban) == $this->countries[$code])
			{
				$movedChar = substr($this->iban, 4).substr($this->iban,0,4);
				$movedCharArray = str_split($movedChar);
				$newString = "";
				foreach($movedCharArray as $key => $value){
					if(!is_numeric($movedCharArray[$key])){
						$movedCharArray[$key] = $this->chars[$movedCharArray[$key]];
					}
					$newString .= $movedCharArray[$key];
				}
				$this->valid = bcmod($newString, '97') == 1;
			}
		}
		return $this->valid;
	}

	/**
	* Return SWIFT (BIC) bank code from current IBAN
	* e.g. SK5281300000002000260100 returns CITISKBA
	*/
	public function getSwift()
	{
		if(!empty($this->iban) && $this->isValid()){
			$code = substr($this->iban, 4, 4); // e.g. 1100
			if(array_key_exists($code, $this->swift)){
				return $this->swift[$code];
			}
		}
	}

	/**
	* Extract account number from IBAN
	* (all characters from 8th position to the right)
	*/
	public function getAccount()
	{
		if(!empty($this->iban) && $this->isValid()){
			return substr($this->iban, 8);
		}
	}

	/**
	* Extract bank code from IBAN
	* (characters 4 - 8)
	*/
	public function getBankNum()
	{
		if(!empty($this->iban) && $this->isValid()){
			return substr($this->iban, 4, 4);
		}
	}

	/**
	* Extract country code from IBAN
	* (first 2 characters)
	*/
	public function getCountryCode()
	{
		if(!empty($this->iban) && $this->isValid()){
			return strtoupper(substr($this->iban, 0, 2));
		}
	}
}