[SOLVED] sessions

[chris_s_22]

im trying to get to grips with using sessions

 

i have a page connection.php - this holds database details and connects to database and also uses session_start this page also does a php include to my functions.php page.

 

in my functions page in the login_user function i do

// Now encrypt the data to be stored in the session
     $encrypted_id = md5($user['id']);
     $encrypted_name = md5($user['username']);

     // Store the data in the session
     $_SESSION['id'] = $id;
     $_SESSION['username'] = $username;
     $_SESSION['encrypted_id'] = $encrypted_id;
     $_SESSION['encrypted_name'] = $encrypted_name;

 

my questions are

on all other pages i create do i need to use session_start so the data is passed and ready for me to use? if not what do i do so i can use the session data to do checks.

do i still need to use session_start if on the page i do a php include to connection.php or would this be classed as doing the same thing since i do a session_start in my connection.php page. 

 

last question if i have a form that send data to a page, that pages then checks data then calls for profile_edit function that i wanted to do a query to my database using something like this

<?php
function profile_edit($forminput1)
$query = ("UPDATE users SET feild1='$forminput1' WHERE username='$username'");
$result = mysql_query ($query) or die ('Could not edit user.');
if($result)
{	
// Reshow the form with an error
    $updateeditprofile_error = 'error';
    include 'profileeditform.php';
    exit;
}
else
{
echo "hello";
}
}
?>

how do i do some kind of check to make sure my code in the query is using the session data $username

[rarebit]

Basically anything included all becomes one big entity, so you only need to start the session once.

 

and

 

echo $_SESSION['username'];