CODEWITHSUNDEEP
phparraysmultidimensional-array
bxN5
bxN5

Reputation: 1430

Usort sort multidimensional array by duplicate values

I have an array 

[0] => ['name' => John, city => NY, street => WallStreet ..some anouther fields]
[1] => ['name' => Bill, city => FI, street => smstr..  some anouther fields]
[2] => ['name' => John, city => NY, street => WallStreet  ..some anouther fields]
[3] => ['name' => Bill, city => FI, street => smstr ..some anouther fields]
[4] => ['name' => 4, city => 4, street => 4 ..some anouther fields]

I need to sort it to get all duplicate name city and street fields to be on the top of array or just in sequence

what I want

[] => ['name' => John, city => NY, street => WallStreet..some anouther fields]
[] => ['name' => John, city => NY, street => WallStreet ..some anouther fields]
[] => ['name' => Bill, city => FI, street => smstr  ..some anouther fields]
[] => ['name' => Bill, city => FI, street => smstr ..some anouther fields]
[] => ['name' => 4, city => 4, street => 4 ..some anouther fields]

I'm trying use usort

 usort($sorted, function($a, $b) {
            if ($a['name'] == $b['name'] &&
              $a['city'] == $b['city'] &&
              $a['street'] == $b['street']
            ){
                return 1;
            }
            else {
                return -1;
            }
        });

but it's does not work on php 5.3 , can anybody propose the solution?

p/s I'm working with php 5.3 :(

Upvotes: 1

Views: 234

Answers (1)

AbraCadaver
AbraCadaver

Reputation: 78994

You can map to an array imploding the values, sort that descending and sort the original by that array:

array_multisort(array_map(function($v) {
                              return implode('-', $v);
                          }, $array), 
                SORT_DESC, $array);

To break it out and understand the pieces:

// Build an array of the values in each sub array
// John-NY-WallStreet
$sorter = array_map(function($v) { return implode('-', $v); }, $array);
print_r($sorter);
// Sort that descending sorting the original array the same
array_multisort($sorter, SORT_DESC, $array);

This will work for all of the elements in the arrays. If for whatever reason you only want name, city and street, then replace the return with:

return $v['name'].'-'.$v['city'].'-'.$v['street'];

Upvotes: 3

Related Questions