converting cookie to a session

[rednax]

Hello:

The following code utilizes cookies to check whether or not a user has voted on a particular image (that has a unique 'uid'). I recently decided to change this setup to sessions rather that cookies for the obvious advantages.

<?php
import_request_variables('GPC', 'g_'); // GPC: GET/POST/COOKIES

include('globals.inc');

if (isset($g_action) && $g_action == 'vote') {
    if (isset($_COOKIE['vote']) && array_key_exists($g_uid, $_COOKIE['vote'])) {
        echo "<p align='center'>You have already voted on this picture.</p>";
    } else { 
        setcookie("vote[$g_uid]", $g_v, time()+3600, "/"); //g_v: the users rating [1-10]

	$connection = mysql_connect($host, $dbuser, $dbpass);
	mysql_select_db($dbname, $connection);
	$sql = "SELECT num_votes, rating FROM $tbl_users WHERE uid='$g_uid'";
	$result = mysql_query($sql, $connection);

	$get = mysql_fetch_array($result);
	    $num_votes = $get['num_votes'];
	    $rating_old = $get['rating'];

	/* figures out $updated_rating */

	$sql = "UPDATE users SET users.rating = '$updated_rating', users.num_votes = (num_votes + 1) WHERE uid = '$g_uid'";
	if (mysql_query($sql, $connection)) {
		$success = "1";
	}
}
}

?>

Could someone show me how I could change this into a session rather than a cookie.

Thank you

• rednax

[goa103]

Hi,

include('globals.inc');

add session_start (); beneath the include

isset($_COOKIE['vote'])

Replace COOKIE by SESSION

setcookie("vote[$g_uid]", $g_v, time()+3600, "/"); //g_v: the users rating [1-10]

Before you had to use session_register, now you can just assign a value to $SESSION:
$SESSION ['vote$g_uid'] = $g_v;

mysql_

Don't forget to check the return value of your mysql functions !
@myql? () or die ("Error message");
Or use a if:

$Users = mysql_query ("...Users...");

if ($Users == FALSE)
{
die ("Can't select users");
}
else
{
...
}

UPDATE users SET users.

users. is useless

import_request_variables

Nice function but remember that giving the global scope to variables is not a good thing. That's why it's now disabled and that the PHP developers introduced _? variables.

So see, SESSION works the same way that COOKIE does. The main difference is that you don't have to set the SESSION expiration time!

Hope it helps,
JM