watermelon challenge

watermelon-challenge.php

<?php
/*
* ROOM FOR IMPROVEMENT
* both halves have to be divisible by 2
*/
function watermelon($n) {
	$ans = array();
	if(is_integer($n)) {
		$parts = range(1, ($n - 1));
		foreach($parts as $part) {
			if ($part%2 === 0) {
				$remainder = $n - $part;
				if ($remainder%2 === 0 
					&& ($remainder != $part) 
					&& $remainder > $part
				) {
					$ans[] = array($part, $remainder);
				}
				if($remainder == $part) {
					$ans[] = array($part, $remainder);
				}
			}
		}
	}

	return array_map(function($n) {
		return '(' .$n[0] . ',' . $n[1] . ')';
	}, $ans);
}

var_dump(watermelon(8));