王新阳

网站安装SSL证书后，未https访问根据端口判断，并自动转至https

if($_SERVER['SERVER_PORT']=='80'){
    header("Location: https://www.abc.com".$_SERVER['REQUEST_URI']);
    exit;
}

增加对域名的判断

switch(strtolower($_SERVER['SERVER_NAME'])){
    case 'abc.com':
        if($_SERVER['SERVER_PORT']=='80'){
            header("Location: https://www.abc.com".$_SERVER['REQUEST_URI']);
            exit;
        }
        break;
}

对是否为https方式访问的判断，不能单纯靠 $_SERVER['SERVER_PORT']=='80
建议方法：

function is_https() {
	if(isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT']==='443'){
		return true;
	}elseif( !empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off'){
		return true;
	}elseif( !empty($_SERVER['HTTP_FROM_HTTPS']) && strtolower($_SERVER['HTTP_FROM_HTTPS']) !== 'off'){ //西部数码
		return true;
	}else{
		return false;
	}
}

使用.htaccess重定向

RewriteEngine On
RewriteCond %{HTTP:From-Https} !^on$ [NC]
RewriteCond %{HTTP_HOST} ^(www.)?abc.com$ [NC]
RewriteRule ^(.*)$ https://www.abc.com/$1 [R=301,L]