file_get_contents cannot obtain web page content

In the process of signature verification, the server often needs to obtain a user's information from the channel server. There are generally two methods, curl and file_get_contents.

Under normal circumstances, there will be no problem if you use it like this.

<span> 1</span><span>public</span><span>function</span> OauthPostExecuteNew(<span>$sign</span>,<span>$requestString</span>,<span>$request_serverUrl</span><span>){
</span><span> 2</span><span>$opt</span> = <span>array</span>("http"=><span>array</span><span>(
</span><span> 3</span>         "method"=>"GET",
<span> 4</span>         "header"=><span>array</span>("param:".<span>$requestString</span>,"oauthsignature:".<span>$sign</span>),
<span> 5</span>         "request_fulluri"=><span>true</span><span> 6</span><span>        )
</span><span> 7</span><span>    );
</span><span> 8</span><span> 9</span><span>$context</span> = <span>stream_context_create</span>(<span>$opt</span><span>);
</span><span>10</span><span>$res</span>=<span>file_get_contents</span>(<span>$request_serverUrl</span>, <span>false</span>, <span>$context</span><span>);
</span><span>11</span><span>12</span><span>return</span><span>$res</span><span>;
</span><span>13</span> }

However, since our server connects to the external network through a proxy, you need to bring the proxy parameter when using stream_context_create to access the channel server.

So add "proxy"=>$proxy field to the $opt array in the above code. After adding it, I found that file_get_contents still cannot be verified normally.

I was puzzled, so I went to the official website to check file_get_contents and found that there was no explanation about proxy. Then I searched for stream_context_create. The official explanation has this sentence

params

must be $arr['parameter'] = Associative array in $value format. Please refer to the standard resource flow parameter list in context parameters.

Then let’s go into context_parameters to view the parameter configuration. Because we are using HTTP, check the HTTP context

to view the proxy server address specified by the proxy-related

proxystring

URI. (e.g. tcp://proxy.example.com:5100).

request_fulluri boolean

When set to TRUE , the entire URI will be used when constructing the request. (i.e. GET http://www.example.com/path/to/file.html HTTP/1.0). Although this is a non-standard request format, some proxy servers require it.

The default value is FALSE.

I found that only proxy was configured, but request_fulluri was not configured, so I added request_fulluri=true and the verification passed.

Note: When using the proxy parameter, you need to change http to tcp. I don’t know the specific reason. I'll update here when I find out.

The above introduces the problem that file_get_contents cannot obtain web content, including aspects of content. I hope it will be helpful to friends who are interested in PHP tutorials.