How to retain my input value after socket connection of my domain

[dnetware]

This is the code below
How can I retrieve the $plan and $year so that l can pass it to the next page

<?php
$plan = $_POST['plan'];// input value from previous page
$year = $_POST['year'];// input value from previous page

?>

<?php
//Code to check domain name

function checkDomain($domain, $server, $findText)
{
    $con = fsockopen($server, 43);
    if (!$con) return false;
    fputs($con, $domain . "\r\n");
    $response = ':';
    while (!feof($con)) {
        $response .= fgets($con, 128);
    }
    fclose($con);
    if (strpos($response, $findText)) {
        return true;
    } else {
        return false;
    }
}

function showDomainResult($domain, $server, $findText)
{
    if (checkDomain($domain, $server, $findText, $plan)) {
        echo "<br/>
<form action='client.php' method='post'>

<tr><td><b>The Domain Name: $domain.$plan</b></td><td><b>Status: AVAILABLE</b></td><td>
<input type='submit' name='submit' value='Proceed' /></td></tr>";
    } else echo "<br/><tr><td><b>The Domain Name: $domain</td><td><b>Status: NOT AVAILABLE
</b></td><td><b>Search Another Domain or change Tld!</b></td></tr></form>";
}

?>

<?php
include('files/head.php');
?>
<div id="buttom_content">
    <div id="box" style="margin: 10px  40px 0 40px">
        <h2 style="margin-bottom: 10px" ;>Our Cart!</h2>

    <p style="margin:0 0 10px 10px">Choose A Free Domain For The Selected Package(.com, .org, .net, .info)</p>

    <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" name="domain">

        <table>
            <tr>
                <td><h3>Enter A Domain name</h3>:</td>
                <td><input type="text" name="domain"/>
                    <select name="tld">
                        <option value=".com">.com</option>
                        <option value=".net">.net</option>
                        <option value=".org">.org</option>
                        <option value=".info">.info</option>

                    </select></td>
                <td><input type="submit" name="submit" value="Search"/></td>
            </tr>
        </table>
    </form>

    <?php
    if (isset($_POST['submit'])) {
        $domainbase = (isset($_POST['domain'])) ? $_POST['domain'] : '';
        $d_com = (isset($_POST['tld'])) ? $_POST['tld'] : '';
        if (strlen($domainbase) > 2) {
            echo "<table>";
            if ($d_com != '')
                showDomainResult($domainbase . $d_com, 'whois.crsnic.net', 'No match for');
            echo "</table>";
        }
    }
    ?>

    <?php echo $year . " " . $plan; // echo of the previous variable $plan and $year but lost after socket connection?>
</div>
</div>

[NogDog]

Please be sure to use this forum's [noparse]

...

[/noparse] tags around your PHP code, as well as making use of other bbcode tags where helpful.

As a quick answer to your question, the most common solutions would be either to store the interim data in session variables (see "session_start()" and "$_SESSION" in the manual), or putting it into hidden form elements (type="hidden"). The latter has the drawback that a malicious user could spoof different data, so I don't recommend that if that could cause a problem for you.

[sneakyimp]

If you need to retain values supplied by some user from one page request to the next, there are a variety of ways this can be done. Which method you use depends on a variety of things:
is the data sensitive?
is there any risk of hackers exploiting this value or trying other values?
* is there a lot of data (e.g., 5000 characters) or is it really short.

As NogDog suggested, you could use [man]session_start[/man] to begin a session on the first page, then store the data in [man]$SESSION[/man] and then call session_start on the later pages and check for the value you stored in $SESSION. This method depends on the propagation of a session id which is usually accomplished using cookies. PHP can take care of all the details under most circumstances, but if the user doesn't accept your cookies (or send them back to you) then you are out of luck.

Another way is simply to pass the value along as part of a url:

// NOTE: this approach is probably vulnerable to hacker abuse
$val = $_POST["val"];
// do some kind of calculation here maybe
echo 'You can find your results on <a href="/path/to/some/other-page.php?val=' . urlencode($val) . '">this other page</a>';

You can also put the value into a form input, etc.