php获得当前页面url

获取当前页面Url之前要判断是否为https

function is_https() {
    if ( !empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off') {
        return true;
    } elseif ( isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https' ) {
        return true;
    } elseif ( !empty($_SERVER['HTTP_FRONT_END_HTTPS']) && strtolower($_SERVER['HTTP_FRONT_END_HTTPS']) !== 'off') {
        return true;
    }
    return false;
}

$url = "";
if(is_https()){
    $url.="https://";
}else{
    $url.="http://";
}
$url.=$_SERVER['HTTP_HOST'];
if($_SERVER["SERVER_PORT"]!=80){
    $url.=$url.":".$_SERVER["SERVER_PORT"];
}
$url.=$_SERVER["REQUEST_URI"];