How to zoom to object on WMS layer with OpenLayers?

Question

I have a map with WMS layer. And want to zoom to selected object. Now i use GetCapabilities from Geoserver and zoom to bbox of whole layer.
So how to do what i want?

Or can u tell me how to get feature bbox from Capabilities? Or how to get FeatureInfo without clicking on map?

UPDATE

                       info_id=myVecLayer.getFeaturesByAttribute("id",'5')
                       alert(info_id[0].geometry.getBounds());
                       app.mapPanel.map.zoomToExtent(info_id[0].geometry.getBounds());
                       //myVecLayer is WFS layer

Its do something strange. If feature shows in map window it will be zoomd to it. But if not shows get a error TypeError: info_id[0] is undefined. What is wrong?

UPDATE 2

Ok now this is Request method

                        info_id=OpenLayers.Request.GET({
                                    url:'http://localhost:8080/geoserver/wfs?service=wfs&version=1.1.0&request=GetFeature&typeName=cite:filedata_temp&featureID=filedata_temp.4',
                                    success: function(e){
                                    alert(e.responseText);
                                    }
                                });

its ok. But how to get bbox from there?

UPDATE 3

Now i use a GeoExt.FeatureStore to zoom to feature.
But i have a problem i try zoom_store.layer.getFeaturesByAttribute("id",'5'); and all work. But if i use variable zoom_store.layer.getFeaturesByAttribute("id",some_variable); i get error TypeError: info_id[0] is undefined. Why its heppening?

Answer 1

In order to get the bbox you can use the same CQL filter in a WFS GetFeature request, and enable "feature bounding" in the WFS options to make it generate the bbox. This will unfortunately also give you the full feature contents, if you just want the BBOX there is a WPS process that returns just the BBOX instead.

Answer 2

So after all i use this.
1. Create GeoExt.FeatureStore.

                    zoom_store = new GeoExt.data.FeatureStore({
                                layer: myVecLayer,
                                fields: [
                                    {name: 'id', type: 'int'},
                                    {name: 'mydata', type: 'String'}
                                ],
                                 proxy: new GeoExt.data.ProtocolProxy({
                                    protocol: new OpenLayers.Protocol.WFS({
                                        version: "1.0.0",
                                        srsName:"EPSG:900913",
                                        url: "http://localhost:8080/geoserver/wfs",
                                        featureType: "filedata_temp",
                                        featureNS: "http://www.opengeospatial.net/cite",
                                        //filter:Ffilter
                                    })
                                }),
                                autoLoad: true
                            });

2 Create atother one layer.

vectorLayer = new OpenLayers.Layer.Vector("Editable features");
                                app.mapPanel.map.addLayer(vectorLayer);
                                vectorLayer.visibility=false;

3 Add features to this layer.

vectorLayer.addFeatures(some_features);

4 Zoom to this layer.

app.mapPanel.map.zoomToExtent(vectorLayer.getDataExtent());
                            vectorLayer.removeAllFeatures();

I will glad if u give me something more usefull.