PHP Post data with Fsockopen

Question

I am attempting to post data using fsockopen, and then returning the result. Here is my current code:

<?php
$data="stuff=hoorah\r\n";
$data=urlencode($data);

$fp = fsockopen("www.website.com", 80, $errno, $errstr, 30);
if (!$fp) {
    echo "$errstr ($errno)<br />\n";
} else {
    $out = "POST /script.php HTTP/1.0\r\n";
    $out .= "Host: www.webste.com\r\n";
    $out .= 'Content-Type: application/x-www-form-urlencoded\r\n';
    $out .= 'Content-Length: ' . strlen($data) . '\r\n\r\n';
    $out .= "Connection: Close\r\n\r\n";
    fwrite($fp, $out);
    while (!feof($fp)) {
        echo fgets($fp, 128);
    }
    fclose($fp);
}
?>

It is supposed to echo the page, and it is echoing the page, but here is the script for script.php

<?php
echo "<br><br>";    
$raw_data = $GLOBALS['HTTP_RAW_POST_DATA'];  
 parse_str( $raw_data, $_POST );

//test 1
var_dump($raw_data);
echo "<br><br>":
//test 2
print_r( $_POST );  
?>

The outcome is:

HTTP/1.1 200 OK Date: Tue, 02 Mar 2010 22:40:46 GMT Server: Apache/2.2.3 (CentOS) X-Powered-By: PHP/5.2.6 Content-Length: 31 Connection: close Content-Type: text/html; charset=UTF-8 string(0) "" Array ( )

What do I have wrong? Why isn't the variable posting its data?

"Curl is free and open software" Curl is licensed under the MIT/X license. — Xorlev, Mar 02 '10 at 23:38
you cant expect everyone (even people with shared hosting) to want and get curl — Joseph Robidoux, Mar 02 '10 at 23:40
I could be wrong about this, but shouldn't there only be one \r\n after each of the header fields? With the exception of the last one of course... — Chris Thompson, Mar 02 '10 at 23:41
shouldn't '\r\n' be "\r\n" ? Do those escape things work in single quotes — Tom Haigh, Mar 02 '10 at 23:45
Do you have `always_populate_raw_post_data` enabled? http://www.php.net/manual/en/ini.core.php#ini.always-populate-raw-post-data — Tom Haigh, Mar 04 '10 at 07:55
If you can't use cURL binaries, you can try pURL, a pure PHP implementation of cURL. — m3nda, Jun 20 '15 at 22:27
You only have the double \r\n after the last header. You have it twice, after content-length: and connection: — Allan Jude, Feb 19 '20 at 14:56

score 20 · Answer 1 · answered Jan 05 '11 at 21:40

There are many small errors in your code. Here's a snippet which is tested and works.

<?php

$fp = fsockopen('example.com', 80);

$vars = array(
    'hello' => 'world'
);
$content = http_build_query($vars);

fwrite($fp, "POST /reposter.php HTTP/1.1\r\n");
fwrite($fp, "Host: example.com\r\n");
fwrite($fp, "Content-Type: application/x-www-form-urlencoded\r\n");
fwrite($fp, "Content-Length: ".strlen($content)."\r\n");
fwrite($fp, "Connection: close\r\n");
fwrite($fp, "\r\n");

fwrite($fp, $content);

header('Content-type: text/plain');
while (!feof($fp)) {
    echo fgets($fp, 1024);
}

And then at example.com/reposter.php put this

<?php print_r($_POST);

When run you should get output something like

HTTP/1.1 200 OK
Date: Wed, 05 Jan 2011 21:24:07 GMT
Server: Apache
X-Powered-By: PHP/5.2.9
Vary: Host
Content-Type: text/html
Connection: close

1f
Array
(
    [hello] => world
)
0

Why does it show "1f" and "0" at the end there? I get the same, but not quite sure. — carestad, Nov 15 '12 at 21:11
it works but you have to change in fsockopen to fsockopen('www.example.com', 80); and in fwrite to fwrite($fp, "Host: www.example.com\r\n"); — Julian, Mar 21 '14 at 13:35

score 1 · Answer 2 · answered Mar 02 '10 at 23:01

1

At no point is $data being written to the socket. You want to add something like:

$out .= "Connection: Close\r\n\r\n";
fwrite($fp, $out);
fwrite($fp, $data);

answered Mar 02 '10 at 23:01

Rob

47,999
5
74
91

I did that and still no cigar. – Joseph Robidoux Mar 02 '10 at 23:20

score 1 · Answer 3 · answered Mar 02 '10 at 23:30

1

Try this instead

$out .= 'Content-Length: ' . strlen($data) . '\r\n';
$out .= "Connection: Close\r\n\r\n";
$out .= $data;

answered Mar 02 '10 at 23:30

Ben Rowe

28,406
6
55
75

Try installing a packet sniffer on your server and see what headers are actually being sent to the server. Are they the same as what you're sending in php? – Ben Rowe Mar 03 '10 at 21:16

score 1 · Answer 4 · answered Mar 05 '10 at 18:55

Try this:

<?php
$data="stuff=hoorah\r\n";
$data=urlencode($data);

$fp = fsockopen("www.website.com", 80, $errno, $errstr, 30);
if (!$fp) {
    echo "$errstr ($errno)<br />\n";
} else {
    $out = "POST /script.php HTTP/1.0\r\n";
    $out .= "Host: www.webste.com\r\n";
    $out .= "Content-Type: application/x-www-form-urlencoded\r\n";
    $out .= 'Content-Length: ' . strlen($data) . "\r\n\r\n";
    $out .= "Connection: Close\r\n\r\n";
    fwrite($fp, $out);
    fwrite($fp, $data);
    while (!feof($fp)) {
        echo fgets($fp, 128);
    }
    fclose($fp);
}
?>

Some character escapes such as \n do not work in single quotes.

score 1 · Answer 5 · answered Mar 23 '11 at 15:26

1

Nice one Tamlyn, works great!

For those that also need to send get vars along with the url,

//change this:

fwrite($fp, "POST /reposter.php HTTP/1.1\r\n");

//to:

$query = 'a=1&b=2';
fwrite($fp, "POST /reposter.php?".$query." HTTP/1.1\r\n");

answered Mar 23 '11 at 15:26

MisterM

175
2
8

score 0 · Answer 6 · edited May 23 '17 at 12:30

you can use this technique it will help to call as many as pages you like all pages will run at once independently without waiting for each page response as asynchronous.

cornjobpage.php //mainpage

    <?php

post_async("http://localhost/projectname/testpage.php", "Keywordname=testValue");
//post_async("http://localhost/projectname/testpage.php", "Keywordname=testValue2");
//post_async("http://localhost/projectname/otherpage.php", "Keywordname=anyValue");
//call as many as pages you like all pages will run at once independently without waiting for each page response as asynchronous.
            ?>
            <?php

            /*
             * Executes a PHP page asynchronously so the current page does not have to wait for it to     finish running.
             *  
             */
            function post_async($url,$params)
            {

                $post_string = $params;

                $parts=parse_url($url);

                $fp = fsockopen($parts['host'],
                    isset($parts['port'])?$parts['port']:80,
                    $errno, $errstr, 30);

                $out = "POST ".$parts['path']."?$post_string"." HTTP/1.1\r\n";//you can use GET instead of POST if you like
                $out.= "Host: ".$parts['host']."\r\n";
                $out.= "Content-Type: application/x-www-form-urlencoded\r\n";
                $out.= "Content-Length: ".strlen($post_string)."\r\n";
                $out.= "Connection: Close\r\n\r\n";
                fwrite($fp, $out);
                fclose($fp);
            }
            ?>

testpage.php

    <?
    echo $_REQUEST["Keywordname"];//case1 Output > testValue
    ?>

PS:if you want to send url parameters as loop then follow this answer :https://stackoverflow.com/a/41225209/6295712

score 0 · Answer 7 · edited Dec 03 '15 at 14:00

0

Try this in reposter.php

$raw_data = $GLOBALS['HTTP_RAW_POST_DATA']; 
parse_str( $raw_data, $_POST );

print_r( $_POST );

Because, the data wasn't in the $_POST[] variables but it was in the $GLOBALS['HTTP_RAW_POST_DATA'] variable.

edited Dec 03 '15 at 14:00

whoan

8,143
4
39
48

answered Dec 08 '11 at 03:52

chandoo

1,276
2
21
32

score -1 · Answer 8 · answered Jan 05 '12 at 06:52

Curl is too heavy in some case, to use post_to_host():

//GET:
$str_rtn=post_to_host($str_url_target, array(), $arr_cookie, $str_url_referer, $ref_arr_head, 0);

//POST:
$arr_params=array('para1'=>'...', 'para2'=>'...');
$str_rtn=post_to_host($str_url_target, $arr_params, $arr_cookie, $str_url_referer, $ref_arr_head);

//POST with file:
$arr_params=array('para1'=>'...', 'FILE:para2'=>'/tmp/test.jpg', 'para3'=>'...');
$str_rtn=post_to_host($str_url_target, $arr_params, $arr_cookie, $str_url_referer, $ref_arr_head, 2);

//raw POST:
$tmp=array_search('uri', @array_flip(stream_get_meta_data($GLOBALS[mt_rand()]=tmpfile())));
$arr_params=array('para1'=>'...', 'para2'=>'...');
file_put_contents($tmp, json_encode($arr_params));
$arr_params=array($tmp);
$str_rtn=post_to_host($str_url_target, $arr_params, $arr_cookie, $str_url_referer, $ref_arr_head, 3);

//get cookie and merge cookies:
$arr_new_cookie=get_cookies_from_heads($ref_arr_head)+$arr_old_cookie;//don't change the order

//get redirect url:
$str_url_redirect=get_from_heads($ref_arr_head, 'Location');

post to host php project location: http://code.google.com/p/post-to-host/

score -2 · Answer 9 · answered Nov 07 '12 at 09:48

-2

Sorry for refresh, but for people who still have problem like this, change HTTP/1.0 to HTTP/1.1 and it will work.

answered Nov 07 '12 at 09:48

Piotr

227
1
3
11

score -2 · Answer 10 · answered Mar 02 '10 at 23:47

-2

Is using cURL and option?

answered Mar 02 '10 at 23:47

code_burgar

12,025
4
35
53

PHP Post data with Fsockopen

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