谷歌应用引擎(PHP):如何处理HTML表单

Can anyone help me with html forms in php on google app engine. I have two files, first file sends username and password to second file, and that second file should display appropriate message.

This is first.html

<html>
<body>

    <form action="hello.php" method="POST">
        <b>Username: </b> <input type="text" name="username"> <br>
        <b>Password: </b> <input type="text" name="password"> <br>
        <input type="submit">
    </form>

</body>
</html>

This is hello.php (second file):

<?php

$username = $_POST['username'];
$password = $_POST['password'];

if($password == 'user' and $password =='pass')
echo 'Success';
else
echo 'Fail';

?>

When I press Submit button in first.html my two textboxes just goes blank and my link changes, but I don't see any message.If I run hello.php manually then it shows message.

Try adding this to app.yaml, before your main URI handler

- url: /hello.php*
  script: hello.php

This is weird. $password cant hold both values ta the same time

if($password == 'user' and $password =='pass')

should probably be

 if($username == 'user' && $password =='pass')

change the content of Hello.php file with this

<?php

$username = $_POST['username'];
$password = $_POST['password'];

if($username == 'user' && $password =='pass')
{
   echo 'Success';
}
else
{
   echo 'Fail';
}