ex2

<?php

$numbers = [1, 2, '3', 6, 2, 3, 2, 3];
print var_dump(isInList($numbers,67));

function isInList($list,$elementToBeFound) {
    foreach ($list as $each) {
        if($each == $elementToBeFound){
            return true;

        }
    }
    return false;
}