How to Use userAgent to detect mobile device

Question

Can anyone help me with this.

I would like to detect device such as Iphone, BB, andriod and browser to apply their specific css to make it liquefied or adjust to th

Answer 1

use this code on your website under 
 tag.

---

Here is the code for the mobile device detection.

 function isMobile() {

// Check the server headers to see if they're mobile friendly
if(isset($_SERVER["HTTP_X_WAP_PROFILE"])) {
    return true;
}

// If the http_accept header supports wap then it's a mobile too
if(preg_match("/wap\.|\.wap/i",$_SERVER["HTTP_ACCEPT"])) {
    return true;
}

// Still no luck? Let's have a look at the user agent on the browser. If it contains
// any of the following, it's probably a mobile device. Kappow!
if(isset($_SERVER["HTTP_USER_AGENT"])){
    $user_agents = array("midp", "j2me", "avantg", "docomo", "novarra", "palmos", "palmsource", "240x320", "opwv", "chtml", "pda", "windows\ ce", "mmp\/", "blackberry", "mib\/", "symbian", "wireless", "nokia", "hand", "mobi", "phone", "cdm", "up\.b", "audio", "SIE\-", "SEC\-", "samsung", "HTC", "mot\-", "mitsu", "sagem", "sony", "alcatel", "lg", "erics", "vx", "NEC", "philips", "mmm", "xx", "panasonic", "sharp", "wap", "sch", "rover", "pocket", "benq", "java", "pt", "pg", "vox", "amoi", "bird", "compal", "kg", "voda", "sany", "kdd", "dbt", "sendo", "sgh", "gradi", "jb", "\d\d\di", "moto");
    foreach($user_agents as $user_string){
        if(preg_match("/".$user_string."/i",$_SERVER["HTTP_USER_AGENT"])) {
            return true;
        }
    }
}

// Let's NOT return "mobile" if it's an iPhone, because the iPhone can render normal pages quite well.
if(preg_match("/iphone/i",$_SERVER["HTTP_USER_AGENT"])) {
    return false;
}

// None of the above? Then it's probably not a mobile device.
return false;
}
    if (isMobile()) {
   header("location:$mobile");
  // if the function returned true, it's a mobile.
  //echo "mobile"; // delete this line in your code, and uncomment the next line
 // header('Location: http://www.yoursite.mobi/'); // let's redirect the page to   the mobile site

   }

Hope this will help you.