src/lib/IBAN.php
public function format()
    {
        return sprintf(
            '%s %s %s',
            $this->getCountryCode() . $this->getChecksum(),
            substr($this->getInstituteIdentification(), 0, 4),
            implode(' ', str_split($this->getBankAccountNumber(), 4))
        );
    }
public function format()
    {
        return sprintf(
            '%s %s %s',
            $this->getCountryCode() . $this->getChecksum(),
            substr($this->getInstituteIdentification(), 0, 4),
            implode(' ', str_split($this->getBankAccountNumber(), 4))
        );
    }
public function format ( ) { return sprintf ( '%s %s %s' , $ this -> getCountryCode ( ) . $ this -> getChecksum ( ) , substr ( $ this -> getInstituteIdentification ( ) , 0 , 4 ) , implode ( ' ' , str_split ( $ this -> getBankAccountNumber ( ) , 4 ) ) ) ; }
Pretty print IBAN

@return string
Pretty print IBAN