PHP code problem

 <?php
 function main($formUse = true)
 {
$link = mysql_connect('bondsolutionsnjcom.fatcowmysql.com', 'lightswitch', '*password*');
if (!$link) {
    die('Could not connect: ' . mysql_error());
}
echo 'Connected successfully';
mysql_select_db('red_light_life_accounts1');

// This could be supplied by a user, for example
$username;
$password;

if(!$username || !$password) {

    echo "Login or password cant be empty.";

} else {

    $SQL = "SELECT * FROM accounts WHERE username = '$username' & password = '$password'";

        $result_id = @mysql_query($SQL) or die("DATABASE ERROR!");

        $total = mysql_num_rows($result_id);

        if($total >= 1) {

            $datas = @mysql_fetch_array($result_id);

            $count = strlen($password);
            $count2 = strlen($datas['passwird']);

            if(!strcmp($count, $count2)) {

                echo "Success";

            } else {

                echo "Username or password is wrong.";

            }

        } else {

            echo "Data invalid - cant find username.";

        }

    }
 }

// Close mySQL Connection

mysql_close();
?>