public static function postal($check)
{
$pattern = '/^[1-9][0-9]{3}$/';
return (bool) preg_match($pattern, $check);
}
/** * test the postal method of ChValidation * * @return void */ public function testPostal() { $this->assertTrue(ChValidation::postal('5112')); $this->assertFalse(ChValidation::postal('05112')); }