how can i pass variable through page html link to another page

I want to pass php variable to another page using html link
here is my code

<?php
$error = '';

if(isset($_POST['is_login'])){
    $sql = "SELECT * FROM ".$SETTINGS["USERS"]." WHERE `email` = '".mysql_real_escape_string($_POST['email'])."' AND `password` = '".mysql_real_escape_string($_POST['password'])."'";
    $sql_result = mysql_query ($sql, $connection ) or die ('request "Could not execute SQL query" '.$sql);
    $user = mysql_fetch_assoc($sql_result);
    if(!empty($user)){
        $_SESSION['user_info'] = $user;
        $query = " UPDATE ".$SETTINGS["USERS"]." SET last_login = NOW() WHERE id=".$user['id'];
        mysql_query ($query, $connection ) or die ('request "Could not execute SQL query" '.$query);
    }
    else{
        $error = 'Wrong email or password.';
    }
}

if(isset($_GET['ac']) && $_GET['ac'] == 'logout'){
    $_SESSION['user_info'] = null;
    unset($_SESSION['user_info']);
}
?>
<?php if(isset($_SESSION['user_info']) && is_array($_SESSION['user_info'])) { ?>

    <form id="login-form" class="login-form" name="form1">

        <div id="form-content">
            <div class="welcome">
                <?php echo $_SESSION['user_info']['name']  ?>, you are logged in. 
                <br /><br />
                <?php echo $_SESSION['user_info']['content']  ?>
                <br /><br />
                <a href="login.php?ac=logout"   style="color:#3ec038">Logout</a>
                <?php $user =$_GET['name']; ?>
                 <a href="home.php?name= <?php echo $user ?>"  ac=Darshboard" style="color:#F00">Home</a>

I want to pass variable $user through link <a href="home.php?name= <?php echo $user ?>". Please use the above code to help correct on my link with variable $user.