Check Browser Code

$u_agent = $_SERVER['HTTP_USER_AGENT']; 
 if(preg_match('/MSIE/i',$u_agent)) { 
  //ie
 }else if(preg_match('/Chrome/i',$u_agent)){
  //chrome
 }else if(preg_match('/webkit/i',$u_agent)){
  //safari
 }else if(preg_match('/Firefox/i',$u_agent)){
  //firefox
 }