下面的代码来自一个用PHP编写的登录脚本.它检查密码的数据库不使用MD5加密密码,但是当登录脚本检查数据库中的密码时,它正在检查原始密码而不加密.我熟悉md5()函数但是如何将其合并到以下内容中:

session_start();

$username = $_POST['username'];

$password = $_POST['password'];

if ($username && $password) {

$connect = mysql_connect("host", "user", "password") or die("Couldn't connect");

mysql_select_db("dbname") or die("Couldn't find the database");

$query = mysql_query("SELECT * FROM users WHERE username='$username'");

$numrows = mysql_num_rows($query);

if ($numrows != 0) {

while ($row = mysql_fetch_assoc($query)) {

$dbusername = $row['username'];

$dbpassword = $row['password'];

}

if ($username == $dbusername && $password == $dbpassword) {

echo "You're in! Click here to enter the member page.";

$_SESSION['username'] = $username;

}else{

echo "Incorrect password";

}

}else{

die("That username does not exist.");

}

}else{

die("Please enter a valid username and password.");

}

?>