Validation for James

gistfile1.aw

<?php

// set up a stack
$options = array();

/* our list of values to ignore (the ones that are permitted to be duplicates) 
	(made into an array so that you can easily add other options to be ignored, 
		without having to modify the other rules) */
$exceptions = array('10');

// rule out empty values
if (!empty($option1) && !in_array($exceptions, $option1)) { 
	array_push($options, $option1); // push the value to the stack
}

if (!empty($option2) && !in_array($exceptions, $option2)) { 
	array_push($options, $option2);
}

/* 

... repeat for each $option

	$options should now look like this:

	array (
		[0] => value1
		[1] => value2
		[2] => value3
		[3] => value4
		[4] => value5
	)

*/

/* Check the size of the stack against the size of the stack with duplicates 
	removed, if it's smaller, we know there were duplicates, if it's the same 
	size, we're fine */
if (sizeof($options) < sizeof(array_unique($options))) {
	$errorMessage = 'Error - you cannot pick the same reward more than once 
		(except pension contribution).';
}

?>