Post data with php

Question

I want to know how to post data with php, for example get the input from the local php then write to the input with id on another webpage. I think that those are called PHP bots, but I didn't quite understand the function. If you could just show me the code, if this is possible.

UPDATE: To make it cleaner - how to "write" to an input on another page with PHP.

Do you mean you wish to make another request with the post data, or are you just trying to echo out post data that was sent to your page? — Kyle, Feb 19 '13 at 14:03
Your anwser is here: http://stackoverflow.com/questions/13971003/php-server-side-post It even specifies specifically to call the POST directly from your PHP code (server-side). Client-side you can do it in means of a FORM-tag and specify your action="" field towards the webapge you want to POST to. — , Feb 19 '13 at 14:05
I also asked nicely not to close the question, **because** I need answers for my specific question, not other questions. — Bogdan Cuza, Feb 19 '13 at 15:26

makim · Accepted Answer · 2013-02-19T20:03:24.157

To Post Data to an URL, you can use CURL for that.

$my_url = 'http://www.google.com';
$post_vars = 'postvar1=' . $postvar1 . '&postvar2=' . $postvar2;

$curl = curl_init($my_url);
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $post_vars);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($curl, CURLOPT_HEADER, 0);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

$response = curl_exec($curl);

UPDATE

If you don´t want to use CURL you can try it this way:

$server= 'www.someserver.com';
$url = '/path/to/file.php';
$content = 'name1=value1&name2=value2';
$content_length = strlen($content);
$headers= "POST $url HTTP/1.0\r\nContent-type: text/html\r\nHost: $server\r\nContent-length: $content_length\r\n\r\n";
$fp = fsockopen($server, $port, $errno, $errstr);
if (!$fp) return false;
fputs($fp, $headers);
fputs($fp, $content);
$ret = "";
while (!feof($fp)) {
$ret.= fgets($fp, 1024);
}
fclose($fp);
print $ret;

and if you´re using PHP5 here's a function you can use to post data to an URL:

function do_post_request($url, $data, $optional_headers = null)
{
  $params = array('http' => array(
              'method' => 'POST',
              'content' => $data
            ));
  if ($optional_headers !== null) {
    $params['http']['header'] = $optional_headers;
  }
  $ctx = stream_context_create($params);
  $fp = @fopen($url, 'rb', false, $ctx);
  if (!$fp) {
    throw new Exception("Problem with $url, $php_errormsg");
  }
  $response = @stream_get_contents($fp);
  if ($response === false) {
    throw new Exception("Problem reading data from $url, $php_errormsg");
  }
  return $response;
}

this function is from here

and to use this function do something like

<?php

do_post_request('http://search.yahoo.com/', 'p=hello+yahoo')

?>

this will search for "hello yahoo"

Careful, on a clean PHP install on Linux curl is not a default library that comes with the package. It should just be pointed out how you really POST in PHP. This is not a direct method. It's either by calling a PHP fopen()/redirect or in means of a HTML-form. — , Feb 19 '13 at 14:11
Could you explain it and give an example without using cURL? — Bogdan Cuza, Feb 19 '13 at 15:22
I meant the second code, that's without cURL and second that do post, how to specify the input, if they're multiple and also get a captcha from the page — Bogdan Cuza, Feb 20 '13 at 13:40
multiple input you can specifiy with "&" like "post1=hello&post2=world" and you have to put it in the $content variable! To get a captcha from the page you have to parse the response — makim, Feb 20 '13 at 14:51
Hey, I wanted to ask if it is possible to do this with javascript? — Bogdan Cuza, Apr 10 '13 at 16:52

Post data with php

1 Answers1