Online PHP editor | refs for BQ9mA

@ 2020-02-19T15:25:54Z

<?php

$arr1 = [
    'Brian',
    'A',
    'Leo',
    'A',
    'Mike'
];

$arr2 = [
        1,2,3,4,5
];

$set = [];

foreach($arr1 as $key => $value){
    if(!isset($set[$value])) $set[$value] = true;
    else{
        unset($arr1[$key]);
        unset($arr2[$key]);
    }
}

print_r($arr1);
print_r($arr2);