确定 PHP 超时的根本原因
不久前，我注意到我的应用程序发出了一些 Soap 错误，我开始调查它们。像这样的东西：
SoapClient::SoapClient(http://###.###.###.###:8080/path/to/some.wsdl): 无法打开流: HTTP 请求失败!SoapClient::SoapClient(): I/O 警告：无法加载外部实体“http://###.###.###.###:8080/path/to/some.wsdl”SOAP-错误：正在解析 WSDL：无法从以下位置加载'http://###.###.###.###:8080/path/to/some.wsdl'：无法加载外部实体“http://###.###.###.###:8080/path/to/some.wsdl”
看起来远程服务器超时（WSDL 缓存已关闭） ）。在退回该服务器但没有运气之后，我尝试使用 file_get-contents() WSDL 来看看会发生什么...
没有骰子：大约 20 秒后，我得到了相同的流错误:
file_get_contents(http://###.###.###.###:8080/path/to/some.wsdl) [function.file-get-contents]：无法打开流：HTTP 请求失败！
在最后的努力中，我尝试通过 curl_*功能，事实上我确实得到了我想要的东西。
... tl；博士？
- SoapClient 和 file_get_contents 似乎超时（尽管不是明确的“无法打开流，连接超时”）
- 它似乎与流相关，因为curl 给了我我正在寻找的东西。
- 我有很多代码依赖于
SoapClient和file_get_contents，因此切换到全卷曲解决方案实际上并不是一个选择。 - 这不是 DNS 问题，因为我可以很好地解析外部名称（并且我的目标资源是 IP）
allow_url_fopen已启用。
有什么想法吗？
A little while ago I noticed some Soap errors emitting from my app and I started to investigate them. Stuff like:
SoapClient::SoapClient(http://###.###.###.###:8080/path/to/some.wsdl): failed to open stream: HTTP request failed!SoapClient::SoapClient(): I/O warning : failed to load external entity "http://###.###.###.###:8080/path/to/some.wsdl"SOAP-ERROR: Parsing WSDL: Couldn't load from 'http://###.###.###.###:8080/path/to/some.wsdl' : failed to load external entity "http://###.###.###.###:8080/path/to/some.wsdl"
It looked like a timeout on the remote server (WSDL caching was turned off). After bouncing that server and having no luck, I tried to just file_get-contents() the WSDL to see what would happen...
No dice: After about 20 seconds or so I got the same stream error:
file_get_contents(http://###.###.###.###:8080/path/to/some.wsdl) [<a href='function.file-get-contents'>function.file-get-contents</a>]: failed to open stream: HTTP request failed!
In a last ditch effort, I tried to read the contents via the curl_* functions, and I do in fact get what I'm looking for.
... tl;dr?
- SoapClient and file_get_contents appear to be timing out (though not an explicit "Failed to open stream, connection timed out")
- It appears to be related to streams since curl gives me what I'm looking for.
- I've got a lot of code that depends on
SoapClientandfile_get_contentsso switching to an all curl solution isn't really an option. - This is not a DNS issue as I can resolve external names fine (and my target resource is an IP)
allow_url_fopenis enabled.
Any ideas?
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allow_url_fopen需要在 PHP 设置中On才能使file_get_contents处理 URL。否则它会给你确切的错误。通过使用phpinfo();调用加载页面来仔细检查您的 PHP 设置，以确保它们没有被不同的 php.ini 或 .htaccess 文件覆盖。否则我猜是防火墙问题，但你说curl在PHP内部工作，它会以相同的方式打开套接字。
allow_url_fopenneeds to beOnin your PHP settings forfile_get_contentsto work with URLs. It'll give you that exact error otherwise. Double-check your PHP settings by loading a page with aphpinfo();call to make sure they're not being overridden by a different php.ini or .htaccess file.I'd guess a firewall problem otherwise but you say curl works from inside PHP, which would be opening sockets in the same manner.