// 判断是移动端还是PC端  $http_user_agent = isset($_SERVER[‘HTTP_USER_AGENT‘]) ? strtolower($_SERVER[‘HTTP_USER_AGENT‘]): ‘‘;$http_accept = isset($_SERVER[‘HTTP_ACCEPT‘]) ? strtolower($_SERVER[‘HTTP_ACCEPT‘]): ‘‘;$pos_hua = strpos($http_user_agent, ‘mobi‘);$pos_a_wap = strpos($http_accept, ‘wap‘);$pos_a_wml = strpos($http_accept, ‘wml‘);  if($pos_hua !== FALSE) {    echo ‘Mobile‘;//exit;} elseif($pos_a_wap !== FALSE) {    echo ‘Mobile‘;//exit;} elseif($pos_a_wml !== FALSE) {    echo ‘Mobile‘;//exit;} else {    echo ‘PC‘;}