How does thinkPHP handle curl exceptions?

How does PHP handle exceptions? How do I know whether the execution is successful or failed? {Code...} How does PHP handle exceptions? How do I know whether the execution is successful or failed?

    public function get_user($ch, $apikey) {        \Think\Log::record('into get_user...');        curl_setopt($ch, CURLOPT_URL, 'https://sms.xxx.com/v2/user/get.json');        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query(array('apikey' => $apikey)));        $response = curl_exec($ch);        \Think\Log::record('$response : '.$response);        if (false === $response) {            die(curl_error);        }        return $response;    }

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How does PHP handle exceptions? How do I know whether the execution is successful or failed?

    public function get_user($ch, $apikey) {        \Think\Log::record('into get_user...');        curl_setopt($ch, CURLOPT_URL, 'https://sms.xxx.com/v2/user/get.json');        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query(array('apikey' => $apikey)));        $response = curl_exec($ch);        \Think\Log::record('$response : '.$response);        if (false === $response) {            die(curl_error);        }        return $response;    }

$apiKey = '';$ch = curl_init();curl_setopt($ch, CURLOPT_URL, 'https://sms.yunpian.com/v2/user/get.json');curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query(array('apikey' => $apiKey)));curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 1);$response = curl_exec($ch);if (false === $response) {    die(curl_error($ch));}print_r($response);

Run the debugging on your own. Do not explain it.

Throw Exception throw new Exception ()
Code that may trigger an exception try {...}
Catch (Exception $ e ){}

Supplement:

Protected function curl ($ url, $ postFields = null) {$ ch = curl_init (); curl_setopt ($ ch, CURLOPT_URL, $ url); curl_setopt ($ ch, CURLOPT_USERAGENT, 'mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.1) '); curl_setopt ($ ch, CURLOPT_HEADER, 0); curl_setopt ($ ch, CURLOPT_FAILONERROR, 0 ); curl_setopt ($ ch, CURLOPT_RETURNTRANSFER, 1); // curl_setopt ($ ch, CURLOPT_HTTPHEADER, array ('Expect CT: '); if (is_array ($ postFields) & 0 <Count ($ postFields) {$ postBodyString = ''; $ postMultipart = false; foreach ($ postFields as $ k => $ v) {if ('@'! = Substr ($ v, 0, 1) // determines whether the file is uploaded {$ postBodyString. = '$ k = '. urlencode ($ v ). '&';} else // multipart/form-data for file upload; otherwise, www-form-urlencoded {$ postMultipart = true ;}} unset ($ k, $ v); curl_setopt ($ ch, CURLOPT_POST, 1); if ($ postMultipart) {cur l_setopt ($ ch, CURLOPT_POSTFIELDS, $ postFields );} else {// var_dump ($ postBodyString); curl_setopt ($ ch, CURLOPT_POSTFIELDS, substr ($ postBodyString, 0,-1);} $ reponse = curl_exec ($ Ch); // return curl_getinfo ($ ch); if (curl_errno ($ ch) {throw new Exception (curl_error ($ ch), 0 );} else {$ httpStatusCode = curl_getinfo ($ ch, CURLINFO_HTTP_CODE); if (200! ==$ HttpStatusCode) {throw new Exception ($ reponse, $ httpStatusCode) ;}} curl_close ($ ch); return $ reponse ;}

Supplement: @ incNick: in PHP 7, an Exception Error is added, which is in the same level as Exception.
Refer
1. http://php.net/manual/zh/migration70.incompatible.php
2. http://php.net/manual/zh/language.errors.php7.php

In a project, it is hard to ensure that the http requests sent by curl are correct and returned within the timeout range.
So for the code behind the project to correctly handle curl errors, I think throwing an exception is the best way.

$response = curl_exec($ch);if (false === $response) {    die(curl_error($ch));    throw new Exception(curl_error($ch),curl_errno($ch));}

PHP also has try catch throw.