AJAX post returning 500 Internal Server Error on Live Server

[amskape]

I created a script where a user can select from a variety of
shipping options for an order from within a jQuery dialog box. The
shipping rates are delivered via UPS & FedEx. Oddly enough, the
script works fine on my development machine, but on the live server,
Firebug returns a "500 Internal Server Error"

Here is what my jQuery looks like:

jQuery("#select-shipping").click(function(){
// Open the dialog, start with the "loading page"
 
 
$("#shipping-select").load('func/shipping_load.php').dialog({
            bgiframe: true,
            autoOpen: true,
            position: 'center',
            title: 'Select Shipping Method',
            width: 400,
            height: 400,
            modal: true,
            buttons: {
                'Apply Shipping': function() {
                    var bValid = true;
 
                    if (bValid) {
                        var fship    =    
 
$('input[name=shipping]:checked').val();
                        var arr = 
 
fship.split('-');
                        var shipPrice     =    
 
arr[1];
                        var shipMeth     =    
 
arr[0];
 
                        var subOrder     =    
 
$("#d_total").val();
                        if 
 
($('#customer-discount').val() != 'false') {
                            var minDis = 
 
subOrder * ("."+$("#customer-discount").val());
                            var nTotal = 
 
subOrder - minDis;
 
                            var orderTotal 
 
= nTotal + parseFloat(shipPrice) + parseFloat($("#tax").val());  /* 
 
Order Total minus customer discount */
 
 
 
$("#order_discount_amount").val("-"+minDis.toFixed(2));
                        }
                        else {
                            var orderTotal 
 
= parseFloat(subOrder) + parseFloat(shipPrice) + 
 
parseFloat($("#tax").val());    /* Order Total, No Discount */
                        }
 
 
$("#order_total").val(orderTotal.toFixed(2)),
 
 
$("#shipcost").val(parseFloat(shipPrice)),
 
 
$("#shipping_method").html(shipMeth);
 
 
 
$(this).dialog("destroy");
                    }
                },
                'Close Window': function() {
                    $(this).dialog("destroy");
 
                }
            },
            close: function() {
                $(this).dialog("destroy");
            }
        });
 
        // This portion actually runs the PHP code to get the 
 
rate results from UPS & FedEx
        $.ajax({
               type: "POST",
               url: "func/shipping_selection.php",
            data: "shipid=" + $("#customer-ship-id").val() 
 
+ "&cartid=" + $("#cart_id").val(),
            success: function(html){
                $('#sLoader').fadeOut("fast");
                $("#sLookup").html(html);
            }
         });
 
    });
 

The dialog opens a loader page (with gif) and that portion works fine.
Once the AJAX post is complete (shipping_selec tion.php), it is
supposed to update the "sLookup" div with the HTML from the
shipping_select ion.php page. Like I said, it works perfectly on my
testing server, but fails on the live server. Both are running PHP

5.2xxxx.

Also, notice in the attached images that the 'shipping_selec tion.php'
is actually working...rate results are returned from both UPS and
FedEx, however something is failing on the AJAX success function.

[dgreenhouse]

If you're getting a 5xx error, then, something's going wrong in the script. Bracket (comment out) code segments and selectively enable various sections until you locate the error. Create a test page that just displays the returned results in a div.

[perhapscwk]

all post variable with some special character in script need to replaced by xxx

url = url.replace(/#/g, '%23').replace(/"/g, '%27').replace(/!/g, '%21').replace(/\(/g, '%28').replace(/\)/g, '%29').replace(/\*/g, '%2A').replace(/\+/g, '%2B').replace(/~/g, '%7E');