array_unique not giving the correct output

Question

this give results like

Array( [0] => 5000 [1] => 5001 [2] => 3000 [3] => 3001 [4] => 5000 )

When I use array_unique same result is obtained

Array ( [0] => 5000 [1] => 5001 [2] => 3000 [3] => 3001 [4] => 5000 )

foreach($detail as $key => $value){
            array_push($zips, $value);  
            }   
}

array_unique($zips);

Answer 1

array_unique() does not work by reference. That means, it won't actually modify the original array, just return a new array with the respective modifications. You need to save its output to a new (or the same) variable:

foreach($detail as $key => $value){
    array_push($zips, $value);  
}   

$zips = array_unique($zips);

Read more about Passing by Reference

Answer 2

不需要foreach和array_push ，只需将其应用并保存到所需的变量$zips ：

$zips = array_unique(array_values($zips));