/**

function is_ssl() {if(isset($_SERVER['HTTPS']) && ('1' == $_SERVER['HTTPS'] ||    'on' == strtolower($_SERVER['HTTPS']))){        return true;    }elseif(isset($_SERVER['SERVER_PORT']) && ('443' == $_SERVER['SERVER_PORT'] )) {        //https使用端口443        return true;    }    return false;}

1.$_SERVER['SERVER_PORT']获取https端口

2.https端口443  http端口80