bool Validate_FI::postalCode
     ( 
    
     string $number
    
     , 
     bool $strong
    
   )
Validate Finnish postal code.
Five digit postal code, maybe with a leading 'FI-' (XXXXX or FI-XXXXX).
An optional parameter for activate strong checks using a list of postcodes (not implemented).
$number
     The postal code to be validated
$strong
     optional; strong checks (e.g. against a list of postal codes)(not implemented)
boolean - true if postal code is valid, false otherwise
Using postalCode()
<?php
// Include the package
require_once 'Validate/FI.php';
$postalCode = '00100';
if ( Validate_FI::postalCode($postalCode) ) {
    print 'Valid';
} else {
    print 'Not valid!';
}
?>