php array_combine函数不能正常工作？

Question

This is my code

        $pro_qty = '';
        $se_pro = '';

        $pro_id_nn = $this->getDataAll("SELECT session_pro_id,session_pro_qty FROM `jp_session` WHERE session_pro_id IN (".$pro_id.") AND order_status='3'");

        foreach($pro_id_nn as $pro)
        {
            $pro_qty[] = $pro['session_pro_qty'];
            $se_pro[] = $pro['session_pro_id'];

        }
        $proqty = array_combine($pro_qty,$se_pro);
        echo '<br>';
        print_r($se_pro);
        echo '<br>';
        print_r($pro_qty);
        echo '<br>';
        print_r($proqty);

OUTOUT

first array

$se_pro = Array ( [0] => 5 [1] => 1 [2] => 1 ) ;

second array

$pro_qty = Array ( [0] => 24 [1] => 24 [2] => 22 ) ;

Finally combine two array result is

$proqty = Array ( [5] => 24 [1] => 22 );

but my expecting result is

$proqty = Array ( [5] => 24 [1] => 24 [1] => 22 );

how can i get my expecting result . thanks in advance.

Answer 1

simple solution

foreach($pro_id_nn as $pro)
    {
        $pro_qty[$pro['session_pro_id']][] = $pro['session_pro_qty'];
        }