Mobile_Detect is a lightweight PHP class for detecting mobile devices (including tablets). It uses the User-Agent string combined with specific HTTP headers to detect the mobile environment.
Avant Browser (http://www.avantbrowser.com):
Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; Avant Browser; rv:11.0) like GeckoMozilla/5.0 (Windows NT 6.1; WOW64; Avant TriCore) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36Mozilla/5.0 (Windows NT 5.1; rv:27.0; Avant TriCore) Gecko/20100101 Firefox/27.0
Avant Browser (http://www.avantbrowser.com):
Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; Avant Browser; rv:11.0) like Gecko
Mozilla/5.0 (Windows NT 6.1; WOW64; Avant TriCore) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36
Mozilla/5.0 (Windows NT 5.1; rv:27.0; Avant TriCore) Gecko/20100101 Firefox/27.0