按键值排序数组

Question

So I have this array.

Array
(
    [0] => Array
        (
            [key_1] => something
            [type] => first_type
        )

    [1] => Array
        (
           [key_1] => something_else
           [type] => first_type
        )

    [2] => Array
        (
            [key_1] => something_else_3
            [type] => second_type
        )

    [3] => Array
        (
            [key_1] => something_else_4
            [type] => second_type
        )
)

I have to sort by type value in a pattern like this:

first_type
second_type
first_type
second_type

My questions is, how can I do this?

Thanks a lot!

Answer 1

So here's how I got it to work:

function filter_by_value($array, $index, $value) { 
    if(is_array($array) && count($array) > 0)  { 
        foreach(array_keys($array) as $key){ 
            $temp[$key] = $array[$key][$index]; 
            if ($temp[$key] == $value){ 
                $newarray[$key] = $array[$key]; 
            } 
        } 
    } 
    return $newarray;
}
$array = /* array here */ 
$type1 = array_values(filter_by_value($array, 'type', '1'));
$type2 = array_values(filter_by_value($array, 'type', '2'));
$i = 1; $x = 1; $y = 1;
$sorted = array();
foreach ($array as $a) {
    if ($i % 2) {
        $sorted[$i-1] = $type1[$x-1];
        $x++;
    } else {
        $sorted[$i-1] = $type2[$y-1];
        $y++;
    }
    $i++;
}

Found filter_by_value() on php.net but I don't remember where so, that's not made by me. Maybe this is not the best solution but it works pretty fine.