Manually reoder a php array

I have a page where users select check boxes of data and then sent to a confirmation page.
On the confirmation page the data is presented to them and as each item is displayed there are UP and DOWN arrows to reorder their selections.




What is the best way to accomplish this with php?

here is what i have so far, but it doesnt work please help!

I attached code below

I should mention that the data is caputured on the confirmation page using $_GET

/*
$selectedBets looks like this:
array(3) {
  [0]=>
  string(5) "XXX_5"
  [1]=>
  string(5) "XXX_7"
  [2]=>
  string(5) "XXX_6"
}


************************
$itemToMove is sent through a querystring looking like

currentArrayIndex_UP|DOWN

for example: if i wanted to move index 0 to index 1 
 $itemToMove = 0_DOWN

if i wanted to move index 2 to index 1 
 $itemToMove = 2_UP


*/
function array_Reorder($selectedBets, $itemToMove){
    
    $tempArr = explode("_",$itemToMove);
    $oldKey = $tempArr[0];
    $action = strtoupper($tempArr[1]);
    $newKey = null;
    
    
    $tmpNewArr = array();
    echo "<br>action:$action<Br>";
    echo "old key:$oldKey<Br>";
    

    $tmpNewKey = $oldKey;             
    if($action == "UP"){
         $tmpNewKey = $tmpNewKey - 1;
        $tmpNewArr[$tmpNewKey] = $selectedBets[$oldKey];
        
    }else if ($action == "DOWN"){
         $tmpNewKey = $tmpNewKey + 1;  
         $tmpNewArr[$tmpNewKey] = $selectedBets[$oldKey];
    }else{
          return $selectedBets;
    }
    
    echo "new key:$tmpNewKey<Br><br>"; 
    
    
    
    foreach($selectedBets as $key => $bets){
         
        echo "$key == $tmpNewKey<br>";
        $xKey = $key;
        if($key == $tmpNewKey){
          //skip this entry..we added it above manually
              if($action == "UP"){
                    //echo $key+1 . "up<br>";
                    $xKey = $xKey + 1;
                    $tmpNewArr[$xKey] = $bets; 
                    echo ($xKey). "--" . $bets . "<br>";
                    
              }else if ($action == "DOWN"){
                    $xKey = $xKey -1;
                     $tmpNewArr[$xKey] = $bets; 
                     echo ($xKey) . "--" . $bets . "<br>";
              }
         }else{
             //$tmpNewArr[$key] = $bets;
             
             
             
         }
         if($key == (count($selectedBets)-1)){break;}
    }
    
        //ksort($tmpNewArr);
        echo "<pre>"; var_dump($tmpNewArr);echo "</pre>";
        return $tmpNewArr;
    
}

Select allOpen in new window