I have 2 arrays: colors and favorite colors.
I want to output an array with all the colors but the favorite colors on top, keeping the same sort order.

My example is working fine, but wanted to know if this is the correct (fastest) way to do this.
Thank you

$colors_arr = array("yellow","orange","red","green","blue","purple");
print "<pre>Colors: ";
print_r($colors_arr);
print "</pre>";

$favorite_colors_arr = array("green","blue");
print "<pre>Favorite Colors: ";
print_r($favorite_colors_arr);
print "</pre>";

$normal_colors_arr = array_diff($colors_arr, $favorite_colors_arr);
print "<pre>Colors which are not favorites: ";
print_r($normal_colors_arr);
print "</pre>"; 

// $sorted_colors_arr = $favorite_colors_arr + $normal_colors_arr;
$sorted_colors_arr = array_merge($favorite_colors_arr, $normal_colors_arr);
print "<pre>All Colors with favorites first: ";
print_r($sorted_colors_arr);
print "</pre>"; 

çıktı:

Colors: Array
(
    [0] => yellow
    [1] => orange
    [2] => red
    [3] => green
    [4] => blue
    [5] => purple
)

Favorite Colors: Array
(
    [0] => green
    [1] => blue
)

Colors which are not favorites: Array
(
    [0] => yellow
    [1] => orange
    [2] => red
    [5] => purple
)

All Colors with favorites first: Array
(
    [0] => green
    [1] => blue
    [2] => yellow
    [3] => orange
    [4] => red
    [5] => purple
)