Retrieving data from a page after using php $_POST(submit)

stockton · January 12, 2009

I have created a program using the example at http://www.tizag.com/phpT/examples/formfinale.php as follows:-

<?php
/*
* A program, written by Alf Stockton, to proove that it is possible to run 
* a program on a remote site from a program on this site, passing to the
* remote program whatever parameters it requires to run successfully.
*
* This then for the Khulisa site, removes the requirement for memcache 
* or similar.
*/
ob_start();
    if (!empty($_REQUEST['submit']))
            $Button = ($_REQUEST['submit']);
                    else
            $Button = '';
// echo "Button = ".$Button." ??";
if ($Button == 'Submit')
    {
    $Button = $_REQUEST['submit'];
    session_start();
    ob_start();

    $quote = 0x27;
    // authenticate.
    if (!get_magic_quotes_gpc())
        {
        $_REQUEST['uname'] = addslashes($_REQUEST['uname']);
        }
    $uname = $_REQUEST['uname'];
    $passwd = strip_tags($_REQUEST['passwd']);
    $passwd = stripslashes($_REQUEST['passwd']);
    $date = date('Y-m-d H:i:s');
    $_SESSION['Usrname'] = $uname;
    $_SESSION['Passwrd'] = $passwd;
    $_SESSION['Date'] = $date;
    header("Location: http://motrain.dev.sharing.org.za/test/dong.php");
    }
else
if ($Button == 'Clear') // Clear Previous
    {
    $Ding = 0;
    $uname = "";
    $passwd = "";
    $date = "";
    }
ob_end_flush();
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
          "http://www.w3.org/TR/REC-html40/loose.dtd">
<html>
<head>
<title>Login</title>
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="Mon, 22 Jul 2000 11:12:01 GMT">
<script language="JavaScript" type="text/javascript" src="js/Diva.js"></script>
</head>
<BODY ONLOAD="BodyOnLoad()">
<form name='logon' id='logon' method='POST' action='<?php echo $PHP_SELF; ?>' >
<table align="center" border="3" cellspacing="0" cellpadding="3">
<tr><td>Username:</td><td>
<input type="text" name="uname" id="uname" maxlength="40">
</td></tr>
<tr><td>Password:</td><td>
<input type="password" name="passwd" id="passwd" maxlength="50">
</td></tr>
<input type=hidden name="submit1" id="submit1" value="<?php echo $Ding; ?>" >
</td></tr>
</table>
<center>
<p>
<input type="submit" name="submit" value="Submit">
<input type="submit" name="submit" value="Clear">
<input type="submit" name="submit" value="Back">
</p>
</center>
</form>
</body>
</html>
<script type="text/javascript">
function BodyOnLoad()
    {
    document.logon.uname.focus();
    }
</script>

I now need to retrieve the entered data via

<?php
    $uname = $_POST["uname"];
    $passwd = $_POST["passwd"];

?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
        "http://www.w3.org/TR/REC-html40/loose.dtd">
<html>
<title>motrain's Test</title>
<meta name="author" content="Alf Stockton">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="Mon, 22 Jul 2000 11:12:01 GMT">
</head>
<h2>MOTRAIN's Test</h2>
<center>
Have a Good Day<?php echo " $uname with password $passwd." ?> 
</center>
</body>
</html>

but do not get any data back.

What have I done wrong?

anfo · January 14, 2009

I noticed that in the first script there are $_REQUEST superglobals and in the second you are using $_POST. this could be the problem. the other thing is in the second script there's no session start() and as far as I can see no way of accessing the information in those session variables setup in the first script.

Hope this helps

Anfo

stockton · January 14, 2009

I suspect that the problem is that the 1st program is not submitting a form but rather doing a call to the 2nd machine on a different server.

Therefore the code should be altered as follows:-

header("Location: http://motrain.dev.sharing.org.za/test/dong.php");

should now become :-

header("Location: http://motrain.dev.sharing.org.za/test/dong.php?uname=$uname&passwd=$passwd");

and therefore the 2nd program should be altered to:-

    
$uname = $_GET["uname"];
$passwd = $_GET["passwd"];

from:-

    $uname = $_POST["uname"];
    $passwd = $_POST["passwd"];

This is all because session variables are only available on the 1st machine and any data required on the 2nd machine must be passed via $_GET rather than form submission.

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Retrieving data from a page after using php $_POST(submit)

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