Question

i have an array that looks like:

array(5) {
  ["title"]=>
  string(22) "http://example.com/288"
  ["title2"]=>
  string(22) "http://example.com/290"
  ["title3"]=>
  string(22) "http://example.com/284"
  ["title4"]=>
  array(2) {
    [0]=>
    string(22) "http://example.com/275"
    [1]=>
    string(22) "http://example.com/274"
  }
  ["title5"]=>
  array(2) {
    [0]=>
    string(22) "http://example.com/292"
    [1]=>
    string(22) "http://example.com/291"
  }
}

i want to arsort the arrays which works just fine as long as my value isnt an array in itself. if i arsort($array); it gives this:

array(5) {
  ["title5"]=>
  array(2) {
    [0]=>
    string(22) "http://example.com/292"
    [1]=>
    string(22) "http://example.com/291"
  }
  ["title4"]=>
  array(2) {
    [0]=>
    string(22) "http://example.com/275"
    [1]=>
    string(22) "http://example.com/274"
  }
  ["title2"]=>
  string(22) "http://example.com/290"
  ["title"]=>
  string(22) "http://example.com/288"
  ["title3"]=>
  string(22) "http://example.com/284"
}

but i want it to be this:

array(5) {
  ["title5"]=>
  array(2) {
    [0]=>
    string(22) "http://example.com/292"
    [1]=>
    string(22) "http://example.com/291"
  }
  ["title2"]=>
  string(22) "http://example.com/290"
  ["title"]=>
  string(22) "http://example.com/288"
  ["title3"]=>
  string(22) "http://example.com/284"
  ["title4"]=>
  array(2) {
    [0]=>
    string(22) "http://example.com/275"
    [1]=>
    string(22) "http://example.com/274"
  }
}

so basically i want to sort array from high to low in the url preserving keys, but when i arsort it puts the values that are arrays at the top of the list regardless of the number in the url

Answer 1

EDIT switched to uasort as suggested by @xpapad

You should use uasort() and implement your own comparison function, perhaps:

uasort($arr, function($a, $b) {
  return strcmp(is_array($a) ? $a[0] : $a, is_array($b) ? $b[0] : $b);

});