PHP to determine the mobile phone, PC-side, WeChat sample code sharing

Bloggers here for everyone to share the PHP judgment of two instances, one is the PHP judgment is the mobile phone or PC side, and the second is PHP to determine whether the browser, for your reference, the specific content as follows
1, to determine whether the mobile phone side

function IsMobile () {///If there is http_x_wap_profile, it must be a 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 return Stristr ($_ser ver[' Http_via '], "WAP")?  True:false; }//Brain residue method, determine the mobile phone to send the client logo, compatibility needs to be improved. Where ' Micromessenger ' is the computer if (isset ($_server[' http_user_agent ')) {$clientkeywords = array (' Nokia ', ' Sony ', ' Ericsson ', ' m OT ', ' Samsung ', ' HTC ', ' SGH ', ' lg ', ' sharp ', ' sie-', ' Philips ', ' Panasonic ', ' Alcatel ', ' Lenovo ', ' iphone ', ' ipod ', ' BlackBerry ', ' Meizu ', ' Android ', ' NetFront ', ' Symbian ', ' UCWeb ', ' windowsce ', ' palm ', ' operamini ', ' Operamobi ', '      Openwave ', ' nexusone ', ' cldc ', ' MIDP ', ' wap ', ' mobile ', ' Micromessenger '); 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 ($_server[' http_accept ')) {//If only WML is supported and HTML is not supported that must be a mobile device//If WML and HTML are supported but WML is before HTML the mobile device if ((Strpos ($_server[' http_accept '), ' VND.WAP.WML ')!== false) && (Strpos ($_ server[' http_accept '], ' text/html ') = = = False | | (Strpos ($_server[' http_accept '), ' vnd.wap.wml ') < Strpos ($_server[' http_accept '], ' text/html '))))    {return true; }} return false;}

2. Determine if it is a built-in browser

function Isweixin () {  if (Strpos ($_server[' http_user_agent ', ' Micromessenger ')!== false) {    return true;  } else {    return false;}  }