<?php

print_r(removeDuplicate_1([2,4,7,5,7,4,1]))."\n";
print_r(removeDuplicate_1([3,5,0,0,1,2,6,6]))."\n";

function removeDuplicate_1($nums){
	return array_unique($nums);
}

function removeDuplicates_2($nums){
	$nums=[];
	foreach ($nums as $num){
		if (!in_array($num,$result)){
			$result[]=$num;
		}
	}
	return $result;
}