PHP to determine where visitors come from and share code

This article is mainly to share with you PHP to determine where the visitor from the code, about PHP to determine whether the visitor mobile phone or PC-side functions, hope to help everyone.

/* Mobile judgment */function IsMobile () {//If there is http_x_wap_profile must be the mobile device if (Isset ($_server[' http_x_wap_profile ')) {    return true; }//If the VIA information contains WAP it must be a mobile device, some service associations block the information if (Isset ($_server[' Http_via ')) {//Cannot find for flase, otherwise true re Turn stristr ($_server[' Http_via '), "WAP")?    True:false; }//Brain residue method, determine the mobile phone sent by the client flag, compatibility needs to be improved if (Isset ($_server[' http_user_agent ')) {$clientkeywords = array (' Nokia '            , ' Sony ', ' Ericsson ', ' mot ', ' Samsung ', ' HTC ', ' SGH ',            ' LG ', ' sharp ', ' sie-', ' Philips ', ' Panasonic ', ' Alcatel ', ' Lenovo ', ' iphone ', ' ipod ', ' blackberry ', ' Meizu ', ' Android            OID ', ' NetFront ', ' Symbian ', ' UCWeb ', ' windowsce ', ' palm ',   ' Operamini ', ' operamobi ', ' Openwave ',         ' Nexusone ', ' cldc ', ' MIDP ', ' wap ', ' mobile '; Look for the keyword if (Preg_match ("/(") of the phone's browser from Http_user_agent. Implode (' | ', $clientkeywords).        ")/I", Strtolower ($_server[' http_user_agent '))) {return true;        }}//protocol method, because it may not be accurate, put to the Last Judgment if (Isset ($_server[' http_accept ')) {//If only WML is supported and HTML is not supported it must be a mobile device. If WML and HTML are supported but WML is before HTML the mobile device if ((Strpos ($_server[' http_accept '), ' VND.WAP.WML ')!== false) && (STRP OS ($_server[' http_accept '), ' text/html ') = = = False | |        (Strpos ($_server[' http_accept '), ' vnd.wap.wml ') < Strpos ($_server[' http_accept '], ' text/html '))))        {return true; }} return false;}