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Doing POST Request by Socket Connection

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This example of code shows how to do a simple POST request in PHP to another web server by using a socket connection.

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  1. <?php           
  2. // submit these variables to the server
  3. $post_data = array("test"=>"yes", "passed"=>"yes", "id"=>"3");
  4.  
  5. // send a request to specified server
  6. $result = do_post_request("http://www.example.com/", $post_data); 
  7. if($result["status"] == "ok"){ 
  8.     // headers 
  9.     echo $result["header"]; 
  10.     // result of the request
  11.     echo $result["content"]; 
  12. }else{
  13.     echo "An error occurred: ".$result["error"]; 
  14. }
  15.  
  16. function do_post_request($url, $data, $referer = ""){
  17.     // convert the data array into URL Parameters like a=1&b=2 etc.
  18.     $data = http_build_query($data);
  19.     // parse the given URL
  20.     $url = parse_url($url); 
  21.  
  22.     if($url["scheme"] != "http"){ 
  23.         die("Error: only HTTP requests supported!");
  24.     }
  25.  
  26.     // extract host and path from url
  27.     $host = $url["host"];
  28.     $path = $url["path"];
  29.  
  30.     // open a socket connection with port 80, set timeout 40 sec.
  31.     $fp = fsockopen($host, 80, $errno, $errstr, 40);
  32.     $result = "";
  33.  
  34.     if($fp){ 
  35.         // send a request headers
  36.         fputs($fp, "POST $path HTTP/1.1
  37. ");
  38.         fputs($fp, "Host: $host
  39. "); 
  40.         if($referer != "") fputs($fp, "Referer: $referer
  41. "); 
  42.         fputs($fp, "Content-type: application/x-www-form-urlencode
  43. d
  44. ");
  45.         fputs($fp, "Content-length: ".strlen($data)."
  46. ");
  47.         fputs($fp, "Connection: close
  48.  
  49. ");
  50.         fputs($fp, $data); 
  51.  
  52.         // receive result from request
  53.         while(!feof($fp)) $result .= fgets($fp, 128);
  54.     }else{ 
  55.         return array("status"=>"err", "error"=>"$errstr ($errno)");
  56.     }
  57.  
  58.     // close socket connection
  59.     fclose($fp);
  60.  
  61.     // split result header from the content
  62.     $result = explode("
  63.  
  64. ", $result, 2);
  65.  
  66.     $header = isset($result[0]) ? $result[0] : "";
  67.     $content = isset($result[1]) ? $result[1] : "";
  68.  
  69.     // return as structured array:
  70.     return array(
  71.         "status" => "ok",
  72.         "header" => $header,
  73.         "content" => $content
  74.     );
  75. }
  76.  
  77. ?>

URL: http://www.apphp.com/index.php?snippet=php-post-request-by-socket-connection

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