public static function postal($check)
{
$pattern = '/^[1-9][0-9]{2}([0-9]{2})?$/';
return (bool) preg_match($pattern, $check);
} /**
* test the postal method of TwValidation
*
* @return void
*/
public function testPostal()
{
$this->assertTrue(TwValidation::postal('235'));
$this->assertTrue(TwValidation::postal('615'));
$this->assertTrue(TwValidation::postal('10075'));
$this->assertTrue(TwValidation::postal('71074'));
$this->assertFalse(TwValidation::postal('085'));
}