<?php function maximumProduct($nums) { $count=count($nums); sort($nums); //for all positive numbers-$prod1: $prod1=$nums[$count-1]*$nums[$count-2]*$nums[$count-3]; //for negative numbers-$prod2: $prod2=$nums[0]*$nums[1]*$nums[$count-1]; return max($prod1, $prod2); } echo maximumProduct([7,2,1,2,3,4])."\n"; echo maximumProduct([-1,-2,-3,1,2,3,4])."\n";