Help with If/else Statement please

[djadejones]

In my header, I have a login script as follows:

<form action="login.php" method="post" name="logForm" id="logForm" >
<label>Username: </label><input name="usr_email" type="text" class="required" id="txtbox" size="20"> 
<label>Password: </label><input name="pwd" type="password" class="required password" id="txtbox" size="20">
<input name="doLogin" type="submit" id="doLogin3" value="Login">
</form>

But if the user is logged in then I want it to say:

<h3>Welcome <?php echo $_SESSION['user_name'];?></h3>

So how can I please do the "if user is logged in then say welcome else show login script"?

Thanks,
Adey

[ssystems]

<?php if(isset($_SESSION['user_name'])) { ?>
<h3>Welcome <?php echo $_SESSION['user_name'];?></h3>
<?php }else {?>
<form action="login.php" method="post" name="logForm" id="logForm" >
<label>Username: </label><input name="usr_email" type="text" class="required" id="txtbox" size="20"> 
<label>Password: </label><input name="pwd" type="password" class="required password" id="txtbox" size="20">
<input name="doLogin" type="submit" id="doLogin3" value="Login">
</form>
<?php } ?>