php if判斷出現的鬼怪問題

phpif判斷

if ( !preg_match("/^1[34578]\d{9}$/",$this->request->post['telephone'])) {
$this->error['telephone'] = $this->language->get('error_telephone');
}
else{
$telephone_v = $this->model_account_customer-> getTelephoneValidation($this->request->post['telephone']);
if($telephone_v != 0) {

// $this->error['telephone'] = $this->language->get('error_telephone_v');
printf("得到的資料為：%d", $telephone_v);
$this->error['telephone'] = $this->language->get('error_telephone_v');
}

}
讓人驚訝的是 $telephone_v =0 很能執行並列印了0，錯誤正常顯示。

