ExtJS Window form return

editFiletype : function(btn, e) {
         
        var r = {
            'id' : MODx.request.id,
            'd' : this.menu.record.i,
            'key' : this.menu.record.key,
            'name' : this.menu.record.name,
            'service' : 'MODX'
        };
        if (!this.windows.EditFiletype) {
            this.windows.EditFiletype = MODx.load({
                xtype : 'advicles-window-filetypeedit',
                record : r,
                listeners : {
                    'success' : {
                        fn : function(r) {
                            this.refresh();
                        },
                        scope : this
                    }
                }
            });
        }
        this.windows.EditFiletype.setValues(r);
        this.windows.EditFiletype.show(e.target);
    },

Advicles.window.EditFiletype = function(config) {
    config = config || {};
    this.ident = config.ident || 'advimp' + Ext.id();
    Ext.applyIf(config, {
        title : "Редактировать тип файлов",
        id : this.ident,
        url : "/assets/components/advicles/filetypelist.php",
        action : 'edit',
        fields : [{
            xtype : 'hidden',
            name : 'id',
            value : MODx.request.id
        }, {
            xtype : 'hidden',
            name : 'd',
            value : MODx.request.d
        }, {
            xtype : 'textfield',
            fieldLabel : "Key",
            name : 'key',
            id : 'modx-filetype-key',
            value : MODx.request.key
        }, {
            xtype : 'textfield',
            fieldLabel : "Name",
            name : 'name',
            id : 'modx-filetype-name',
            value : MODx.request.name
        }]
    });
    Advicles.window.EditFiletype.superclass.constructor.call(this, config);
};
Ext.extend(Advicles.window.EditFiletype, MODx.Window, {
    activeOptions : 'advicles-options-MODX',
    changeService : function(cb, s) {
        var nv = cb.getValue();
        var op = Ext.getCmp(this.activeOptions);
 
        var nop = 'advicles-options-' + nv;
        var p = Ext.getCmp(nop);
        if (p) {
            op.hide();
            p.show();
            this.activeOptions = nop;
        }
        return true;
    }
});
Ext.reg('advicles-window-filetypeedit', Advicles.window.EditFiletype);

TypeError: g is undefined
var g = this.getRoot(a), e = g.length, d = e, k = true;

$arr = array();
$arr['success'] = true;
header('Content-type: text/json; charset=utf-8');
echo(json_encode($arr));

function outputArray(array $array,$count = false) {
   if ($count === false) { $count = count($array); }
   return '{"total":"'.$count.'","results":'.$this->modx->toJSON($array).'}';
}

$arr = array();
$arr['success'] = true;
// header('Content-type: text/json; charset=utf-8');
// echo(json_encode($arr));

return outputArray($arr);

$arr['data'] = $value;