PHP 致命错误：未捕获的异常“异常”和消息
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PHP fatal error: Uncaught exception 'Exception' with message
提问by Paul M
I have a PHP script that connects to an api and posts information to their systems, but when its trying to connect it throws a fatal error:
我有一个 PHP 脚本，它连接到一个 api 并将信息发布到他们的系统，但是当它尝试连接时会抛出一个致命错误：
Fatal error: Uncaught exception 'Exception' with message 'Problem with
'http://apitestserver.co.uk:9000/Service.svc/Items' in
/var/www/html/e/connect_test.php:17 Stack trace: #0
/var/www/html/e/connect_test.php(39):
do_http_request('http://apitest....', 'hello') #1 {main} thrown in
/var/www/html/e/connect_test.php on line 17
If I send it to a PHP script which just grabs the IP then it works, but if I send it to the API it doesn't. My PHP script creates XML and then forwards to the server. I was getting errors so I just created the following smaller script purely to test the connection:
如果我将它发送到一个只获取 IP 的 PHP 脚本，那么它就可以工作，但是如果我将它发送到 API，它就不会。我的 PHP 脚本创建 XML，然后转发到服务器。我遇到了错误，所以我只是创建了以下较小的脚本，纯粹是为了测试连接：
function do_http_request($url, $data, $method = 'POST',
$optional_headers = 'Content-Type: application/atom+xml') {
$params = array(
'http' => array(
'method' => $method,
'content' => $data
)
);
if ($optional_headers !== null) {
$params['http']['header'] = $optional_headers;
}
$ctx = stream_context_create($params);
$fp = fopen($url, 'rb', false, $ctx);
if (!$fp) {
throw new Exception("Problem with $url");
}
$response = @stream_get_contents($fp);
if ($response === false) {
throw new Exception("Problem reading data from $url");
}
$metaData = stream_get_meta_data($fp);
fclose($fp);
if(!preg_match('~^HTTP.*([0-9]{3})~',
$metaData['wrapper_data'][0], $matches)){
throw new Exception('MALFORED RESPONSE - COULD NOT UNDERSTAND HTTP CODE');
}
if (substr($matches[1], 0, 1) != '2') {
throw new Exception('SERVER REPORTED HTTP ERROR ' . $matches[1]);
}
return $response;
}
$data = 'hello';
$paul =
do_http_request('http://apitestserver.co.uk:9000/Service.svc/Items',$data);
echo $paul;
If I change the URL to a simple script on another one of our servers which just grabs the IP of the incoming connection and returns it:
如果我将 URL 更改为我们另一台服务器上的简单脚本，该脚本只是获取传入连接的 IP 并返回它：
$ip=$_SERVER['REMOTE_ADDR'];
echo 'IP equals = ' . $ip;
Then it works fine with no errors.
然后它工作正常，没有错误。
Update -
更新 -
with errors on it throws the following warning, probably because the script is not sending the correct info to the API
有错误会抛出以下警告，可能是因为脚本没有向 API 发送正确的信息
Warning: fopen(http://apitestserver.co.uk:9000/Service.svc/Items)
[function.fopen]: failed to open stream: HTTP request failed! HTTP/1.1
500 Data at the root level is invalid. Line 1, position 1.
Also note that I can access the api server fine using fiddler to send manually created items across, its just when this script tries to connect and send data there is an issue. I wrote another quick script which connects and prints out the default response (an rss feed of submitted items)
另请注意，我可以使用 fiddler 很好地访问 api 服务器以发送手动创建的项目，就在此脚本尝试连接和发送数据时出现问题。我编写了另一个快速脚本，它连接并打印出默认响应（提交项目的 rss 提要）
When I run the 'main' connector script it throws the following two errors
当我运行“主”连接器脚本时，它会引发以下两个错误
Warning: fopen() [function.fopen]: php_network_getaddresses:
getaddrinfo failed: Name or service not known in
/var/www/html/e/sequence.php on line 65
Warning: fopen(http://apitestserver.co.uk:9000/Service.svc/Items)
[function.fopen]: failed to open stream: Operation now in progress
in /var/www/html/e/sequence.php on line 65
采纳答案by acrosman
I would suggest using curlinstead of fopen(). curl is both more flexible, and more secure. Many servers disable allow_url_fopen, curl also fails more gracefully when there are problems on the remote server.
我建议使用curl而不是fopen(). curl 更灵活，更安全。许多服务器禁用allow_url_fopen，当远程服务器出现问题时，curl 也会更优雅地失败。
回答by Greg
I just tested the URL in my browser and got a connection error.
我刚刚在浏览器中测试了 URL 并出现连接错误。
Maybe the problem is with their server (or you have the wrong URL)?
也许问题出在他们的服务器上（或者你有错误的 URL）？
Edit:
编辑：
Looks like ther server is throwing a 500 error - maybe because the data you're posting is invalid.
看起来服务器抛出了 500 错误 - 可能是因为您发布的数据无效。
You could use a packet sniffer and check the exact data you're sending to the server (or use cURL as suggested by @acrosman)
您可以使用数据包嗅探器并检查您发送到服务器的确切数据（或按照@acrosman 的建议使用 cURL）
回答by Torandi
apitestserver.co.uk doesn't respond to ping and the url is inaccessable. The API-server doesn't seem to be up.
apitestserver.co.uk 不响应 ping 并且 url 无法访问。API 服务器似乎没有启动。
回答by leafnode
First error message suggests problems with apitestserver - it returns error code 500, which states for "Internal server error".
第一条错误消息表明 apitestserver 存在问题 - 它返回错误代码 500，表示“内部服务器错误”。
Second one informs that PHP can't resolve host name into IP address - I'd look into DNS configuration and/or hosts file.
第二个通知 PHP 无法将主机名解析为 IP 地址 - 我会查看 DNS 配置和/或主机文件。
Apparently 'fopen' function does not return proper stream. There can be many possibilities when that happens, but according to PHP manual, fopen function on fail should present E_WARNING message with proper commentary. It is possible that you have errors of that class silenced - call error_reporting(E_ALL) at the beginning of your script and look for some relevant error messages.
显然 'fopen' 函数没有返回正确的流。发生这种情况时可能有很多可能性，但根据 PHP 手册，失败时的 fopen 函数应显示带有适当注释的 E_WARNING 消息。有可能您已经消除了该类的错误 - 在脚本开头调用 error_reporting(E_ALL) 并查找一些相关的错误消息。
回答by nothingchen
or You can change the headers:
或者您可以更改标题：
$optional_headers = 'Content-Type: application/json')
