<?php

function rotateLeft($arr, $positions) {
    $arr = [];
   foreach($arr as $value){
        if($value[$positions]){
            if($arr[$value] > $value){
                return $arr[$value]
            }
        }
        else{
            return $arr[$value];
        }
   }
}

// Example usage:
$array = [1, 2, 3, 4, 5];
$rotated = rotateLeft($array, 2);
print_r($rotated);  // Output: [3, 4, 5, 1, 2]

function combineAndUnique($array1, $array2) {
    $arr = [];

    foreach($array1 as $count){
        if(!$arr[$count]){
            return $arr[$count];
        }
        foreach($array2 as $count2){
            if(!$arr[$count2]){
                return $arr[$count2];
            }
        }
    }

    return $arr;
}

$array1 = [1, 2, 3, 4];
$array2 = [3, 4, 5, 6];

print_r(combineAndUnique($array1, $array2)); // expected answer: [1, 2, 3, 4, 5, 6]

// Q3: Find the second highest salary from the employees table.

Select Max(salary) from employees orderby salary desc;

// Q4: Find the top 3 highest selling products from the sales table.

Select count(product_id as total_product) from sales group by quantity_sold orderby total_product DESC limit 3

Q5: Find unique numbers.

let numbers = [1, 2, 2, 3, 4, 4, 5, 5, 5];

var num = [];

foreach(numbers as number){
    if(!num[number]){
        return num[number]
    }else{
         return num[number]
    }
}