sort second level Array

Question

i have this Array:

Array
(
    [0] => Array
        (
            [kw] => 46
            [anzahl_betten] => 100
        )

    [1] => Array
        (
            [kw] => 47
            [anzahl_betten] => 100
        )

    [2] => Array
        (
            [kw] => 45
            [anzahl_betten] => 100
        )

)

I want to sort it in "kw" order. I then want to go through the Array with foreach($array as $output) und the Array with kw 45 should be Array[0].

Answer 1

Use usort() for that:

//$array is your array
usort($array, function($x, $y)
{
   return $x['kw']<$y['kw']?-1:$x['kw']!=$y['kw'];
});