php通过http头让页面需要密码登录验证

[table=98%] [tr][td] php通过http头让页面需要密码登录验证
写法一、

<span class="Apple-style-span"style="font-family: Arial; font-size: 12px; line-height: 18px; ">[table=560]  [tr] [td] <div id="blog_text" class="cnt"style="word-wrap: break-word; word-break: normal; visibility: visible !important; zoom: 1 !important; filter: none; overflow-x: hidden; overflow-y: hidden; position: static; "> if(!isset($_SERVER['PHP_AUTH_USER']))
 {
 Header("WWW-Authenticate: Basic realm='pa'");
 Header("HTTP/1.0 401 Unauthorized");
 echo "请登录";
 exit;
 }
 else
 {
 if ( !($_SERVER['PHP_AUTH_USER'] =="hahahaha" && $_SERVER['PHP_AUTH_PW']=="123456ptqwerty123") )
 {
 header("location:".HOME."/index.php");
 }
 }
 
 写法二：
 
 
<font class="Apple-style-span" color="#333333" face="Arial"><span class="Apple-style-span"style="line-height: normal;">