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

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