while loop does not work in function php , global fix of ather

The while loop works fine in this example.

        $query="SELECT * FROM `ex`"; 
        $result=mysqli_query($link, $query); 

        $Q_X='Q1';
                    $res=array(0,0,0,0,0);
                while($report=mysqli_fetch_array($result)){
                    print_r($report[$Q_X].'<br>');

                    if($report[$Q_X]=='X1'){
                        $res[0]=$res[0]+1;

                    }elseif($report[$Q_X]=='X2'){
                        $res[1]=$res[1]+1;

                    }elseif($report[$Q_X]=='X3'){
                        $res[2]=$res[2]+1;

                    }elseif($report[$Q_X]=='X4'){
                        $res[3]=$res[3]+1;

                    }elseif($report[$Q_X]=='X5'){
                        $res[4]=$res[4]+1;
                    }
                }
    list($Q1_1,$Q1_2,$Q1_3,$Q1_4,$Q1_5) = $res; 

    echo $Q1_1.',';
    echo $Q1_2.',';
    echo $Q1_3.',';
    echo $Q1_4.',';
    echo $Q1_5;

but when I try to put it in a function in doesn't work

        $query="SELECT * FROM `ex`"; //new
        $result=mysqli_query($link, $query); 

            function count_vote($Q_X) {
                $cont=0;

                global $result;  //new

                $res=array(0,0,0,0,0);
                while($report=mysqli_fetch_array($result)){

                    if($report[$Q_X]=='X1'){
                        $res[0]=$res[0]+1;

                    }elseif($report[$Q_X]=='X2'){
                        $res[1]=$res[1]+1;

                    }elseif($report[$Q_X]=='X3'){
                        $res[2]=$res[2]+1;

                    }elseif($report[$Q_X]=='X4'){
                        $res[3]=$res[3]+1;

                    }elseif($report[$Q_X]=='X5'){
                        $res[4]=$res[4]+1;
                    }
                }
                if(mysqli_num_rows($result)==$cont){
                return $res;
                }
            }


    count_vote("Q1");
    list($Q1_1,$Q1_2,$Q1_3,$Q1_4,$Q1_5) = $res; 

    echo $Q1_1.',';
    echo $Q1_2.',';
    echo $Q1_3.',';
    echo $Q1_4.',';
    echo $Q1_5;

I using an array to get multiple values returned

and if to prevent the function from exiting before the while loop ending

I am trying to make it into a function to use it multiple times on Q1,Q2,..

can someone help me find the problem

---

              Q1  .  Q2  .  Q3  .  Q4

---

  user1  |    X1  .  X3  .  X5  .  X4

  user2  |    X2  .  X2  .  X3  .  X2

  user3  |    X1  .  X1  .  X1  .  X1

I want to get this resort

 Q1---> X1 >2
   ---> X2 >1
   ---> X3 >0
   ---> X4 >0
   ---> X5 >0

 Q2---> X1 >1
   ---> X2 >1
   ---> X3 >1
   ---> X4 >0
   ---> X5 >0
 Q3,Q4....

while loop does not work in function php

---

  list($Q1_1, $Q1_2, $Q1_3, $Q1_4, $Q1_5) = count_vote($result ,"Q1");

  echo $Q1_1 . ',';
  echo $Q1_2 . ',';
  echo $Q1_3 . ',';
  echo $Q1_4 . ',';
  echo $Q1_5 . '<br>';


  list($Q2_1, $Q2_2, $Q2_3, $Q2_4, $Q2_5) = count_vote($result ,"Q2");

  echo $Q2_1 . ',';
  echo $Q2_2 . ',';
  echo $Q2_3 . ',';
  echo $Q2_4 . ',';
  echo $Q2_5 . '<br>';

does not work ,it gives

2,1,0,0,0

0,0,0,0,0

insed of

2,1,0,0,0

1,1,1,0,0