判断是移动端还是PC端

// 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';
}