<?php
 echo $_SERVER['HTTP_USER_AGENT'];
?>

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)

function my_get_browser(){
 if(empty($_SERVER['HTTP_USER_AGENT'])){
  return 'robot！';
 }
 if( (false == strpos($_SERVER['HTTP_USER_AGENT'],'MSIE')) && (strpos($_SERVER['HTTP_USER_AGENT'], 'Trident')!==FALSE) ){
  return 'Internet Explorer 11.0';
 }
 if(false!==strpos($_SERVER['HTTP_USER_AGENT'],'MSIE 10.0')){
  return 'Internet Explorer 10.0';
 }
 if(false!==strpos($_SERVER['HTTP_USER_AGENT'],'MSIE 9.0')){
  return 'Internet Explorer 9.0';
 }
 if(false!==strpos($_SERVER['HTTP_USER_AGENT'],'MSIE 8.0')){
  return 'Internet Explorer 8.0';
 }
 if(false!==strpos($_SERVER['HTTP_USER_AGENT'],'MSIE 7.0')){
  return 'Internet Explorer 7.0';
 }
 if(false!==strpos($_SERVER['HTTP_USER_AGENT'],'MSIE 6.0')){
  return 'Internet Explorer 6.0';
 }
 if(false!==strpos($_SERVER['HTTP_USER_AGENT'],'Edge')){
  return 'Edge';
 }
 if(false!==strpos($_SERVER['HTTP_USER_AGENT'],'Firefox')){
  return 'Firefox';
 }
 if(false!==strpos($_SERVER['HTTP_USER_AGENT'],'Chrome')){
  return 'Chrome';
 }
 if(false!==strpos($_SERVER['HTTP_USER_AGENT'],'Safari')){
  return 'Safari';
 }
 if(false!==strpos($_SERVER['HTTP_USER_AGENT'],'Opera')){
  return 'Opera';
 }
 if(false!==strpos($_SERVER['HTTP_USER_AGENT'],'360SE')){
  return '360SE';
 }
  //微信浏览器
 if(false!==strpos($_SERVER['HTTP_USER_AGENT'],'MicroMessage')){
  return 'MicroMessage';
 }>
}