HTML

<form action='signup.php' method='post' accept-charset="UTF-8">
	<label class="string" for="user_username">Username</label>
	<input id="user_username" style="margin-bottom: 15px;" type="text" name="username" size="30" />
	<label class="string" for="user_email">Email</label>
	<input id="user_email" style="margin-bottom: 15px;" type="text" name="mail" size="30" />
	<label class="string" for="user_password">Password</label>
	<input id="user_password" style="margin-bottom: 15px;" type="password" name="passwd" size="30" />
	<input class="btn btn-primary"
		style="clear: left;
		width: 100%;
		height: 32px;
		font-size: 13px;"
		type="submit" name="commit" value="Sign Up" />
</form>

SIGNUP.PHP

<?php
	session_start();
	include_once("header.php");
	include_once("functions.php");

	// THIS SECTION THAT FOLLOWS IS TO GRAB THE FIELD VALUES

	$userid	=  $_POST('username');
	$passwd =  $_POST('passwd');
	$email  =  $_POST('mail');
	$status = 'active';

	echo "<p> Username = ".$userid."</p>";
	echo "<p> Password = ".$passwd."</p>";
	echo "<p> Email = ".$email."</p>";
	echo "<p> Status = ".$status."</p>";

	add_user( $userid, $passwd, $email, $status );
	header("Location:index.php");
?>