PHP implementation of analog HTTP request method analysis explained

This article mainly introduces the PHP implementation of the HTTP request method, a simple analysis of the principle of HTTP request, flow and PHP implementation of the simulation HTTP request related operation skills, the need for friends can refer to the following

The example in this article describes how PHP implements a simulated HTTP request. Share to everyone for your reference, as follows:

In the HTTP brief, we mentioned a process of requesting resources from a browser, so can this process be simulated with PHP? The answer is yes.

The following steps are required for PHP to simulate HTTP requests:

1. Connect Apache Server

Use Fsockopen: Dedicated to connect to the server, get a connection resource

2. Writing to the HTTP protocol

Writing content to a resource using fwrite

3. Receiving data

Data returned after a successful request is stored in the resource

4. Parse the data:

Using Fgets, and FGETC functions

Implementation code:

The <?php  //php Analog sends an HTTP request  //1. Connect to the target server Apache  $f =fsockopen (' localhost ', 98, $erron, $error);  2. Write HTTP protocol  //2.1 Patchwork HTTP protocol  //request line  $http = "get/phpstudy/index.php http/1.1\r\n";  The request header  $http. = "host:localhost\r\n";  Blank line  $http. = "\ r \ n";  2.2 to Apache server  if (fwrite ($f, $http))  {    //write succeeded    //3. The data has been received and stored in the F resource    //4. Parsing Resources    // Loop through    while ($line =fgets ($f, 1024x768))    {      //output      echo $line. </br> ";    }  }

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