PHP Sort array with key value

Question

I'm breaking my head to sort array with key value. With this following array i need to sort this by site_category and i need to have output like

Example:

Shopping
   Amazon
Social
   Amoeblo
   American express

Array values are

(
    [0] => stdClass Object
        (
            [site_id] => 1
            [site_name] => Amazon
            [site_img] => http://localhost/faves/resource/img/sites/icon/amazon.png
            [site_category] => Shopping
        )

    [1] => stdClass Object
        (
            [site_id] => 2
            [site_name] => Ameblo
            [site_img] => http://localhost/faves/resource/img/sites/icon/ameblow.png
            [site_category] => Social
        )

    [2] => stdClass Object
        (
            [site_id] => 3
            [site_name] => American Express
            [site_img] => http://localhost/faves/resource/img/sites/icon/americanexpress.png
            [site_category] => Social
        )


)

Any suggestion to solve this?

Answer 1

Virtually a duplicate of Sort php multidimensional array by sub-value

function cmp($a, $b) {
        return $a->site_category - $b->site_category;
}
usort($arr, "cmp");

Answer 2

You can do it using a foreach and ksort

Let $your_array be the array you mentioned above

$res_array    = array();
foreach($your_array as $val){
   $res_array[$val->site_category][] = $val->site_name;
}
ksort($res_array);

print_r($res_array);

OR search for multisort in php which will solve your problem :)

Answer 3

$tmp = array();
$i = 0;

for($i=0;$i<count($carriers);$i++){

    for($j=$i+1;$j<count($carriers);$j++){

        if($carriers[$i]['price']>$carriers[$j]['price']){

            $tmp = $carriers[$i];
            $carriers[$i] = $carriers[$j];
            $carriers[$j] = $tmp;
        }
    }
}       
return $carriers;

This sorts your $carriers array by it's price key.