Ajax调用不会更新我的行

I want to update my database with the ids of characters, but when I drop them into the slot, it doesn't update the rows I want it to update. My question is can you point me in the right direction of how I can code this properly or fix my errors?

function updateTeam(){

var team = '', slot = [];
if($('input[name=s0]').val()!=""){
    slot.push($('input[name=s0]').val());
}
if($('input[name=s1]').val()!=""){
    slot.push($('input[name=s1]').val());
}
if($('input[name=s2]').val()!=""){
    slot.push($('input[name=s2]').val());
}
$.each(slot, function(i,e){
    if(i == 0) team = e;
    else team = team + ',' + e;
});
$.ajax({

       url : _path + "/core/ajax.php",
       type : 'POST',
       data : { f: 'setTeam', i: team},
       dataType : 'json',
       success :  function(data) {
        if(data.error){
            errorMessage('Error: ' + data.error, data.error, data.error);
        }
    }
});
}

Php

function clean($content) {
    $content = mysql_real_escape_string(htmlspecialchars($content));
    return $content;
}
//Update the user team.
if (isset($_POST['f']) && $_POST['f'] == 'updateTeam')  {

if (isset($_POST['s0'])) {
        $cid1 = $secure->clean($_POST['s0']);
    } else {
        $cid1 = '1';
    }

if (isset($_POST['s1'])) {
        $cid2 = $secure->clean($_POST['s1']);
    } else {
        $cid2 = '2';
    }

if (isset($_POST['s2'])) {
        $cid1 = $secure->clean($_POST['s2']);
    } else {
        $cid1 = '3';
    }

$updateTeam = $db->query("UPDATE accounts SET cid1 = '$cid1', cid2 = '$cid2', cid3 = '$cid3' WHERE id = '$id'");
}

When i inspect the element with Google Chrome it says i:1,5,2. Show how would I update my rows so that the 1 in "i"= $cid1, the 5=$cid2, and the 2= cid3, is my php code wrong? Html:

 <div id="droppable_slots" class="current_team">
                    <div class="slot 1">1</div>
                    <input type="hidden" name="s0" value="10">
                    <div class="slot 2">2</div>
                    <input type="hidden" name="s1" value="7">
                    <div class="slot 3">3</div>
                    <input type="hidden" name="s2" value="3">
                </div>

Since you are sending a csv with a the key of i, you need to get your values from $_POST['i'] by exploding on the ,. So your code could be updated to something like-

//Update the user team.
if (isset($_POST['f']) && $_POST['f'] == 'updateTeam')  {

//Explode the i post
if (isset($_POST['i'])) { 
        $vals = explode("," , $_POST['i'] );
    }

if (isset($vals[0])) {
        $cid1 = $secure->clean($vals[0]);
    } else {
        $cid1 = '1';
    }

if (isset($vals[1])) {
        $cid2 = $secure->clean($vals[1]);
    } else {
        $cid2 = '2';
    }

if (isset($vals[2])) {
        $cid1 = $secure->clean($vals[2]);
    } else {
        $cid1 = '3';
    }

$updateTeam = $db->query("UPDATE accounts SET cid1 = '$cid1', cid2 = '$cid2', cid3 = '$cid3' WHERE id = '$id'");
}