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')); }