PHP - sort hash array by key length

user_436944 0
Viewed 9654

I've found a few answers to sorting by value, but not key.

What I'd like to do is a reverse sort, so with:

    $nametocode['reallylongname']='12';
    $nametocode['shortname']='10';
    $nametocode['mediumname']='11';

I'd like them to be in this order

  1. reallylongname
  2. mediumname
  3. shortname

mediumname shortname

Many thanks

key sorting arrays php
11 Answers

In PHP7+ you can use uksort() with spaceship operator and anonymous function like this:

uksort($array, function($a, $b) {
    return strlen($b) <=> strlen($a);
});
user_17674120

To absolutely use uksort you can do like this:

$nametocode['reallylongname']='12';
$nametocode['name']='17';
$nametocode['shortname']='10';
$nametocode['mediumname']='11';

uksort($nametocode, function($a, $b) {
   return strlen($a) - strlen($b);
});

array_reverse($nametocode, true);

Output:

Array
(
   [reallylongname] => 12
   [mediumname] => 11
   [shortname] => 10
   [name] => 17
)

I have tested this code.

user_52087880
Related