Answers for "show to sort arry in php by key"

sort array by key value in php

$inventory = array(

   array("type"=>"fruit", "price"=>3.50),
   array("type"=>"milk", "price"=>2.90),
   array("type"=>"pork", "price"=>5.43),

);
$price = array_column($inventory, 'price');
array_multisort($price, SORT_DESC, $inventory);

php sort array by value and keep key

$weight = [
    'Pete' => 75,
    'Benjamin' => 309,
    'Jonathan' => 101
];
asort($weight);
/*
weight is now:
Array
(
    [Pete] => 75
    [Jonathan] => 101
    [Benjamin] => 309
)
To sort descending instead use: arsort
*/

php order array by specific key

function cmp($a, $b)
    {
        return strcmp($a->display_name, $b->display_name);
    }

    usort($blogusers, "cmp");

    foreach ($blogusers as $bloguser)
    {
        ...