Questions about PHP arrays

PHP array problem
$abc are recycled from the database.
$pieces = Explode ("|", $ABC);
Print_r ($pieces);
Printing results are
Array ([0] = [1] = = Tianjin [2] = = Beijing)
Array ([0] = [1] = = Beijing [2] = Shanghai [3] = Hebei)
Array ([0] = [1] = = Tianjin [2] = Hebei [3] = = Beijing)
I would like to know Tianjin, Hebei, Beijing, Shanghai, the number of occurrences.
Can't seem to use this array_intersect ()

------Solution--------------------
Merge the arrays first with array_count_values

PHP Code

  
  
------Solution--------------------
$array _count = Array ()//cannot be placed in your loop, initialized 1 times
foreach ($pieces as $v) {
   if (!empty ($v)) {
       if (Empty ($array _count[$v])) {
           $array _count[$v] = 1;
       }else{
           $array _count[$v] + = 1;
       }
   }
}

