Header("WWW-Authenticate: Basic realm="USER LOGIN"");
Header("HTTP/1.0 401 Unauthorized");

$_SERVER['PHP_AUTH_USER']
$_SERVER['PHP_AUTH_PW']

<"WWW-authenticate: basic realm="XXX"");
Header("HTTP/1.0 401 Unauthorized");
$title="Login Instructions";
"mailto:support@xxx.com">support@xxx.com</a>.
</blockquote>
<"localhost","nobody","") or die("Unable to connect to SQL server");
mysql_select_db("xxx") or die("Unable to select database");
$user_id=strtolower($PHP_AUTH_USER);
$password=$PHP_AUTH_PW;
$query = mysql_query("select * from users where user_id='$user_id' and password='$password'");
if(!mysql_num_rows($query)) {
Header("WWW-authenticate: basic realm="XXX"");
Header("HTTP/1.0 401 Unauthorized");
$title="Login Instructions";
"mailto:support@xxx.com">support@xxx.com</a>.
</blockquote>
<"name");
$email=mysql_result($query,0,"email");
mysql_free_result($query);
}
"htmlcode">

<"SELECT * FROM healthed_workshop_admin WHERE
user = '$PHP_AUTH_USER' AND
pass = '$PHP_AUTH_PW'";
//put the SQL command and SQL instructions into variable
$result = mysql_query($sql) or die('Unable to connect.');
//get number or rows in command; if more than 0, row is found
$num_matches = mysql_num_rows($result);
if ($num_matches !=0)
{
//matching row found authenticates user
$auth = true;
}
}
if (!$auth)
{
header('WWW-Authenticate: Basic realm="Health Ed Presentation Admin"');
header('HTTP/1.0 401 Unauthorized');
echo 'You must enter a valid username & password.';
exit;
}
else
{
echo 'Success!';
}
"_blank" href="https://www.jb51.net/Special/495.htm">PHP网络编程技巧总结》、《PHP基本语法入门教程》、《php操作office文档技巧总结(包括word,excel,access,ppt)》、《php日期与时间用法总结》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。