How to use File_get_contents ("Php://input")

$data = file_get_contents ("Php://input");
Php://input is a read-only stream that can access the requested raw data. In the case of POST requests, it is best to use php://input instead of $HTTP _raw_post_data because it does not depend on specific php.ini directives. Also, in such cases $HTTP _raw_post_data is not populated by default, and less memory is potentially needed than activating always_populate_raw_post_data. Enctype= "Multipart/form-data" when the Php://input is invalid.


1, Php://input can read the value of the specified length in the HTTP entity body, by specifying the length of the content-length, either by post or by the data submitted by the Get method. However, when the general get method submits the data, the HTTP request Entity body section is empty.
2,php://input and $http_raw_post_data read the same data and read only Content-type data that is not multipart/form-data.
Learn notes
1,coentent-type only if the value is application/x-www-data-urlencoded and Multipart/form-data two, PHP will fill the HTTP request packet with the corresponding data in the global variable $_ POST
2,php Unrecognized content-type type, the corresponding data in the HTTP request package is filled into the variable $http_raw_post_data
3, PHP will not fill in the HTTP request packet of the corresponding data in the Php://input, otherwise, only when Coentent-type is Multipart/form-data. The length of the fill, specified by Coentent-length.
4, php://input data is consistent with $_post data only when Content-type is application/x-www-data-urlencoded.
5,php://input data is always the same as $http_raw_post_data, but php://input is more effective than $http_raw_post_data and does not require special settings php.ini
6,php fills the query_path portion of the path field into the global variable $_get. Normally, the body is empty for the HTTP request submitted by the Get method.

Example
1.php can receive XML data with file_get_contents ("Php://input") or $http_raw_post_data
Like what:
getxml.php;//Receive XML address

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<!--? php       $xml = ' <xml-->xmldata '; XML       $url to send = ' http://localhost/test/getXML.php ';//Receive XML address           $header = ' content-type:text/xml '; Define Content-type FOR XML       $ch = Curl_init (); Initialization of Curl       curl_setopt ($ch, Curlopt_url, $url); Set links       curl_setopt ($ch, Curlopt_returntransfer, 1); Set whether to return information       curl_setopt ($ch, Curlopt_httpheader, $header); Set HTTP Headers       curl_setopt ($ch, Curlopt_post, 1); Set to post mode       curl_setopt ($ch, Curlopt_postfields, $xml); Post data       $response = curl_exec ($ch); Receive return information       if (Curl_errno ($ch)) {//Error displays error message       print Curl_ Error ($CH);      }       curl_close ($ch); Close Curl links       Echo $response; Display return information?>

2. A mobile phone upload pictures to the server applet
Uploading files

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<!--? php      //@file phpinput_post.php       $data = file_get_ Contents (' Btn.png ');       $http _entity_body = $data;       $http _entity_type = ' application/x-www-form-urlencoded ';       $http _entity_length = strlen ($http _entity_body);       $host = ' 127.0.0.1 ';       $port = 80;       $path = '/image.php ';       $fp = Fsockopen ($host, $port, $error _no, $error _desc, 30);       if ($fp) {         fputs ($fp, "POST {$path} HT" Tp/1.1\r\n ");          fputs ($fp, "Host: {$host}\r\n");          fputs ($fp, "Content-type: {$http _entity_type}\r\n");          FPUTS ($fp, "content-length: {$http _entity_length}\r\n");          fputs ($fp, "connection:close\r\n\r\n");          fputs ($fp, $http _entity_body. "\r\n\r\n");             while (! feof ($fp)) {     & nbsp;    $d. = Fgets ($fp, 4096);         }          fclose ($FP);          Echo $d;      }?-->

Receiving files

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<!--? php         /**            *recieve image data          **/              error_reporting (E_all);          function get_contents () {              $xmlstr = file_get_contents ("Php://input");          $filename =time (). '. png ';          if (file_put_contents ($filename, $xmlstr)) {   & nbsp;      Echo ' success ';         } else {          Echo ' failed ';         }         }           get_contents ();?-->

3. Get HTTP Request Original

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/** * Get HTTP request original * @return string/function Get_http_raw () {$raw = '; (1) Request line $raw. = $_server [' Request_method ']. ' ' . $_server [' Request_uri ']. ' ' . $_server [' Server_protocol '].          "\ r \ n"; (2) Request headers foreach ($_server as $key