PHP $_SESSION passing variable to another page-help with syntax

Hi

I would like to store a userID into $_SESSION then reference the $_SESSION in another page. I get how the Session function supposed to work but need help with the syntax please?

I have  a table called users which stores uid, username and password

I have then started the session function like this

<?php

class DB_Functions {
session_start();

Then tried to use the $_SESSION here:

 /**
     * Get user by email and password
     */
    public function getUserByEmailAndPassword($email, $password) {
        $result = mysql_query("SELECT * FROM users WHERE email = '$email'") or die(mysql_error());
        // check for result
        $no_of_rows = mysql_num_rows($result);
        if ($no_of_rows > 0) {
            $_SESSION[email] =$email
            $result = mysql_fetch_array($result);
            $salt = $result['salt'];
            $encrypted_password = $result['encrypted_password'];
            $hash = $this->checkhashSSHA($salt, $password);
            // check for password equality
            if ($encrypted_password == $hash) {
                // user authentication details are correct
                return $result;
            }
        } else {
            // user not found
            return false;

Then called it in the next page as below:
<?php

session_start();

$result = mysql_query("SELECT users.uid, users.name
FROM users
WHERE EXISTS (SELECT 0 FROM available A1, available A2
WHERE  users.uid <> $_SESSION[email])") or die(mysql_error());

But got syntax error

How do i store the ID from the user returned in the 1st query then pass to the second query correctly?