CODEWITHSUNDEEP
phparrayssortingnatural-sortksort
Alex
Alex

Reputation: 68406

Naturally sort an array by alphanumeric key

How can I sort a array like this by its keys, from the smaller resolution to the larger one:

$sizes = array(
   '120x120' => 'large',
   '60x60' => 'small',
   '200x200' => 'very large',
   '90x90' => 'medium',
...

?

should be:

Upvotes: 7

Views: 7322

Answers (5)

code_burgar
code_burgar

Reputation: 12323

Try with ksort().

Sorts an array by key, maintaining key to data correlations. This is useful mainly for associative arrays.

Edit: to make the answer complete, please do use the SORT_NUMERIC flag.

Upvotes: 3

John Parker
John Parker

Reputation: 54425

If you take a look at PHP's Sorting Arrays manual page, you can see there are a few options for sorting the array based on its keys, of which ksort (using the SORT_NUMERIC modifier) is most likely the one you're after.

Upvotes: 0

Alex Pliutau
Alex Pliutau

Reputation: 21957

$sizes = array(
   '120x120' => 'large',
   '60x60' => 'small',
   '200x200' => 'very large',
   '90x90' => 'medium');
uksort($sizes, 'userSorting');
print_r($sizes);
function userSorting($a, $b) {
    $a = explode('x', $a);
    $b = explode('x', $b);
    return $a[0] > $b[0];
}

Upvotes: 3

Haim Evgi
Haim Evgi

Reputation: 125456

you need natural sort by keys, can use uksort 

uksort($array, 'strnatcasecmp');

Upvotes: 11

Pascal MARTIN
Pascal MARTIN

Reputation: 400932

ksort() in numeric mode should work just fine :

$sizes = array(
   '120x120' => 'large',
   '60x60' => 'small',
   '200x200' => 'very large',
   '90x90' => 'medium',
);

ksort($sizes, SORT_NUMERIC);
var_dump($sizes);

will get you :

array
  '60x60' => string 'small' (length=5)
  '90x90' => string 'medium' (length=6)
  '120x120' => string 'large' (length=5)
  '200x200' => string 'very large' (length=10)

This will work because the size is a numeric -- and is found before the `'x'` *(not sure what will be done with the `'x'` and what follows -- but, anyway, that part of the keys is useless, as it's purely redondant information)*

Upvotes: 11

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