Count duplicate values in multidimensional array

Question

I need to count the same values in multidimensional array and remove the duplicates.

My array:

$r = [
    [\'a\',\'b\'],
    [\'a\',\'b\'],
    [\'c\',\'         


        

Answer 1

<?php
$r = [
    ['a','b'],
    ['a','b'],
    ['c','d'],
    ['c','d'],
    ['c','d'],
    ['e','f'],
];
foreach($r as $arr)
{
  $o[implode(',', $arr)][] = 1;
}
$output = [];
array_walk($o, function($v, $k) use(&$output){
    $output[] = array_merge(explode(',', $k), [count($v)]);
});
var_dump($output);

and the output:

array(3) {
  [0]=>
  array(3) {
    [0]=>
    string(1) "a"
    [1]=>
    string(1) "b"
    [2]=>
    int(2)
  }
  [1]=>
  array(3) {
    [0]=>
    string(1) "c"
    [1]=>
    string(1) "d"
    [2]=>
    int(3)
  }
  [2]=>
  array(3) {
    [0]=>
    string(1) "e"
    [1]=>
    string(1) "f"
    [2]=>
    int(1)
  }
}

Answer 2

foreach ( $result1 as $key ):
    $o[implode(', ', $key)][] = null;
     foreach ($o as $key1) {
        $g[implode(', ', $key)] = count($key1);
    }
endforeach;
print_r($g);