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blank screen after php auth script

Guys,

For some reason I cant see the issue here, can anyone see with a fresh pair of eyes why i am getting a blank load screen.

<?php
include_once 'connect.php';
session_start();

if (isset($_POST['submit']))
{
  $email=$_POST['email'];
  $password=$_POST['password'];
  $email=strip_tags($email);
  $password=strip_tags($password);
  $password=md5($password);

  $query = "SELECT * from users where email='$email' and password='$password'";
  $result = mysql_query($query) or die ("could not access users database");
  $result2 = mysql_fetch_array($result);
  if ($result2)
   {
     $_SESSION['id']=$id;

     echo "Logged In <br>";
     echo "<a href='members.php'>Continue</a>";
     exit;
  }
  else
  {
  echo "Wrong Email or Password. <a = href='login.php'>Try Again</a>";
  }
}
?>
0
nullag
Asked:
nullag
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1 Solution
 
Ray PaseurCommented:
Here is an article that addresses PHP client authentication.  It's a good place to start.
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/A_2391.html

 Your script may contain a parse error.  Add these two instructions as the first two after <?php and run it again.
ini_set('display_errors', TRUE);
error_reporting(E_ALL);

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nullagAuthor Commented:
I added both lines of code, it still loads black

I will have a look at the link as well.
0
 
Ray PaseurCommented:
I ran the script standalone and got some messages.  Of course it could not do anything because I do not have your data base, and I did not post any data to the script.  But at least we ruled out PHP parse errors. Try it on my server here.
http://www.laprbass.com/RAY_temp_nullag.php

Maybe if you can post the <form> script that sends its POST data to this script we can find a problem.  Just a thought, ~Ray
<?php // RAY_temp_nullag.php
ini_set('display_errors', TRUE);
error_reporting(E_ALL);

include_once 'connect.php';
session_start();

if (isset($_POST['submit']))
{
  $email=$_POST['email'];
  $password=$_POST['password'];
  $email=strip_tags($email);
  $password=strip_tags($password);
  $password=md5($password);

  $query = "SELECT * from users where email='$email' and password='$password'";
  $result = mysql_query($query) or die ("could not access users database");
  $result2 = mysql_fetch_array($result);
  if ($result2)
   {
     $_SESSION['id']=$id;

     echo "Logged In <br>";
     echo "<a href='members.php'>Continue</a>";
     exit;
  }
  else
  {
  echo "Wrong Email or Password. <a = href='login.php'>Try Again</a>";
  }
}

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0
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nullagAuthor Commented:
This is the POST (Login) page

<form method="POST" action="auth.php">
Email: <input type="text" name="email" size="55">
Password: <input type="password" name="password" size="32" mask="x">
<br>
<input type="submit" value="login" name"submit">

Open in new window

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designatedinitializerCommented:
It's very simple
Change line 8 to:

if (isset($_POST['password']))

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The reason? Input type=submit is not a field and thus it doesn't get sent in the POST request...
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Ray PaseurCommented:
Here is line 5 of the HTML form script
<input type="submit" value="login" name"submit">

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and here is what you probably wanted to have instead.  Note the addition of the equal sign on the name attribute
<input type="submit" value="login" name="submit" />

Open in new window

Once you make that change, please try it again and post back if you still have any troubles.  These things are hard to catch because the browsers will try to render something even if you have given them invalid HTML.  But you can always feed your script to the W3 validator and it will often catch these kinds of errors and tell you about them.
http://validator.w3.org/

Best regards, ~Ray
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nullagAuthor Commented:
Thanks that worked.
0
 
Ray PaseurCommented:
You're kidding, right?  Can you please post a demonstration of how this solved the problem?

Thanks, ~Ray
0
 
designatedinitializerCommented:
Haha!
I was utterly wrong in the reasoning after the fact: my recipe works because it relies on the other input field.

Ray nailed it though, because he found your typo.
Please review this and award him the points.
0
 
nullagAuthor Commented:
My typo
0
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