public static function postal($check)
{
$pattern = '/^[0-9]{4}$/';
return (bool) preg_match($pattern, $check);
}
/** * test the postal method of AuValidation * * @return void */ public function testPostal() { $this->assertTrue(AuValidation::postal('2300')); $this->assertFalse(AuValidation::postal('02300')); }