View Error Handling For Missing Values

view.__get.php

<?php
// Sets the error handler to check the current class for the value if it's missing

// http://stackoverflow.com/a/2669273/99923
error_reporting(E_ALL);
ini_set("display_errors", 0);

class View {
	function display($file, $values)
	{
		set_error_handler(array($this, '__get'), E_NOTICE);		
		extract($values);
		include($file);
		restore_error_handler(); // error handlers are stacked with set_error_handler()
	}

	function __get($vaule)
	{
		echo '[Unknown]';
	}
}

$View = new View;
$values = array('user' => 'Tom', 'email' => 'email@host.com');

$View->display('/filename.php', $values);
?>

filename.php

	Hello <?php echo $user; ?>, your email is <?php echo $email; ?> and your are <?php echo $age; ?> years old.

Output:

	Hello Tom, your email is email@host.com and your are [Unknown] years old.