$document = simplexml_load_file("/data/data/com.flavionet.android.camera.pro/shared_prefs/com.flavionet.android.camera.pro_preferences.xml");
$document['image_resolution'] = 7;
$document->asXML("/data/data/com.flavionet.android.camera.pro/shared_prefs/com.flavionet.android.camera.pro_preferences.xml");