Decoding response error in extjs - extjs3

Question

I am doing the following stuff when a form is submitted. But I get this error:
Error decoding response: SyntaxError: syntax error
Here is my onSubmit success function:
onSubmit: function() {
var vals = this.form.getValues();
Ext.Ajax.request({
url: 'ticketSession.php',
jsonData: {
"function": "sessionTicket",
"parameters": {
"ticket": vals['ticket']
}
},
success: function( result, request ) {
var obj = Ext.decode( result.responseText );
if( obj.success ) {
//alert ('got here');
th.ticketWindow.hide();
Web.Dashboard.loadDefault();
}
},
Here is my ticketSession.php
<?php
function sessionTicket($ticket) {
if( $_REQUEST['ticket'] ) {
session_start();
$ticket = $_REQUEST['ticket'];
$_SESSION['ticket'] = $ticket;
echo("{'success':'true'}");
}
echo "{'failure':'true', 'Error':'No ticket Number found'}");
}
?>
I also modified my onsubmit function but didnt work:
Ext.Ajax.request({
url: 'ticketSession.php',
method: 'POST',
params: {
ticket: vals['ticket']
},
i am simply echoing this but I still get that error
echo("{'success':'true'}");

Answer 1

Maybe this can help you. It's a working example of an ajax-request which is nested in a handler.
var deleteFoldersUrl = '<?php echo $html->url('/trees/delete/') ?>';
function(){
var n = tree.getSelectionModel().getSelectedNode();
//FolderID
var params = {'folder_id':n['id']};
Ext.Ajax.request({
url:deleteFoldersUrl,
params:params,
success:function(response, request) {
if (response.responseText == '{success:false}'){
request.failure();
} else {
Ext.Msg.alert('Success);
}
},
failure:function() {
Ext.Msg.alert('Error');
}
});
}