Count Duplicates and Create Array with Grouped Items | PHP

Question

I have following array.

array(5) {
  [0]=>
  array(1) {
    ["Cars"]=>
    string(5) "Volvo"
  }
  [1]=>
  array(1) {
    ["Cars"]=>
    string(4) "Fiat"
  }
  [2]=>
  array(1) {
    ["Cars"]=>
    string(5) "Volvo"
  }
  [3]=>
  array(1) {
    ["Cars"]=>
    string(8) "Mercedes"
  }
  [4]=>
  array(1) {
    ["Cars"]=>
    string(5) "Volvo"
  }

I need to count all Duplicates and create a new array where i have the name of each group and the number how many duplicates there are. Could someone help me with a simple solution?

Please go read How to Ask. We can help, after you have shown us what you have tried already, and properly described what your issues with that were. We are not here to provide copy&paste-ready solutions for people who haven’t even lifted a finger yet though. — 04FS
– 04FS, Commented Mar 29, 2019 at 13:59
Ive got my sql-result where i loop through to create the array. My plan was to create a multiple array with the name and the total number (count) of that name. This did not worked how i planend it so i started over — Steven Stevensonson
– Steven Stevensonson, Commented Mar 29, 2019 at 14:00
Hint: take a look at array_column and array_count_values — Nick
– Nick, Commented Mar 29, 2019 at 14:00

Qirel · Accepted Answer · 2019-03-29 14:01:07Z

1

Find all values of Carswith array_column(), and count their values with array_count_values().

$array = array(
    ['Cars' => 'Volvo'],
    ['Cars' => 'Fiat'],
    ['Cars' => 'Volvo'],
    ['Cars' => 'Mercedes'],
    ['Cars' => 'Volvo'],
    );

print_r(array_count_values(array_column($array, "Cars")));

Outputs

Array (
    [Volvo] => 3
    [Fiat] => 1
    [Mercedes] => 1
)

Live demo at https://3v4l.org/1jhmh

edited Mar 29, 2019 at 14:01

answered Mar 29, 2019 at 13:55

Qirel

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