Some codility task I solved

codility_profit

<?php
function maxProfit($A) {
  $maxProfit = 0;

	for ($P = 0, $N = count($A); $P < $N; ++$P) {
		for ($Q = $P; $Q < $N; ++$Q) {
			if (
				$A[$Q] >= $A[$P] &&
				$A[$Q] - $A[$P] > $maxProfit
			) {
				$maxProfit = $A[$Q] - $A[$P];
			}
		}
	}
	return $maxProfit;
}