Question

我有以下代码用于在try catch中运行一些代码。但是，当file_get_content失败时，它仍然不会转到catch函数，而只是继续运行并显示更多错误（例如property_exists，因为$weatherJson未定义。

   try{
        $weatherJson = file_get_contents("http://api.someApi?lat={$this->request->getParam("lon")}&lon={$this->request->getParam("lon")}&appid=abcdefg");
        $weatherJson = json_decode($weatherJson);
        if (property_exists($weatherJson, 'list')) {
            $result->weather = $weatherJson->list[0]->weather[0]->main;
            $result->timeStamp = $weatherJson->list[0]->dt_txt;
            return $result;
        } else {
            return "no results found";
        }
    } catch(\Exception $e) {
        echo "something is wrong";

    }

Answer 1

file_get_contents不会抛出异常。

失败时，file_get_contents（）将返回FALSE。

Answer 2

函数file_get_contents不会抛出异常，它会在失败时返回false。如果它返回false，你可以调整你的代码以自己抛出异常。

try {
    $weatherJson = @file_get_contents("http://api.someApi?lat={$this->request->getParam("lon")}&lon={$this->request->getParam("lon")}&appid=abcdefg");
    if (!$weatherJson) {
        throw new \Exception;
    }

    $weatherJson = json_decode($weatherJson);
    if (property_exists($weatherJson, 'list')) {
        $result->weather = $weatherJson->list[0]->weather[0]->main;
        $result->timeStamp = $weatherJson->list[0]->dt_txt;

        return $result;
    } else {
        return "no results found";
    }
} catch(\Exception $e) {
    echo "something is wrong";
}

Answer 3

try{
        $weatherJson = file_get_contents("http://api.someApi?lat={$this->request->getParam("lon")}&lon={$this->request->getParam("lon")}&appid=abcdefg");
        $weatherJson = json_decode($weatherJson);
        if (property_exists($weatherJson, 'list')) {
            $result->weather = $weatherJson->list[0]->weather[0]->main;
            $result->timeStamp = $weatherJson->list[0]->dt_txt;
            return $result;
        } else {
            return "no results found";
        }
    } catch(\Exception $e) {
        echo "something is wrong";

    }

你的捕获中有\删除它

尝试捕获不在PHP中工作

3 个答案: