Script where Page goes Blank!

execute

This is a very simple feedback scripts and for some odd reason, it just goes blank, no error message, nothing. I have tried for days to find the error but no luck.. Please help... thanks in advance:

<?php
session_start();
$username = $_SESSION['username'];
$email = $_SESSION['email'];
$z = $_REQUEST['z'];

if ($z = 1){
 $username = $_POST['username'];
 $email = $_POST['email'];
 $comments = $_POST['comments'];

 stripslashes($username);

 if ((!$username) || (!$email) || (!$comments)) {
  $error = "Sorry but please fill in all the required fields.";
  exit();
 }
 $_SERVER['REMOTE_ADDR'] = $REMOTE_ADDR;
 $ip = $REMOTE_ADDR;
 $to = "ME@ME.com";
 $date = date("l, F j, Y");
 $time = time();
 $subject = "Feedback ^^";
 $msg = "Feedback from $username.
 @ $email!!!
 His comments are: 
 $comments \n\n

 At: $ip   |  $date | $time";
 $mailheaders = "From: Feedback<ME@ME.com>";
 mail($to, $subject, $msg, $mailheaders);
 $error = "Successfully submitted your feedback form! We will reply to your input as soon as possible. Thank you!";
}
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="stylesheet" href="style.css" type="text/css">
</head>

<body>
<fieldset><legend align="center">Feedback</legend><br>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
  <table width="98%" border="0" cellspacing="0" cellpadding="0">
    <tr> 
      <td colspan="2"><div align="center"><?php echo $error; ?></div></td>
    </tr>
    <tr> 
      <td width="48%"><div align="right">Name:</div></td>
      <td width="52%"><?php echo "<input type=\"text\" name=\"username\" value=\"$username\">"; ?></td>
    </tr>
    <tr> 
      <td><div align="right">E-Mail:</div></td>
      <td width="52%"><?php echo "<input type=\"text\" name=\"email\" value=\"$email\">"; ?></td>
    </tr>
    <tr> 
      <td><div align="right">Comments/Suggestions/Questions/Praises:</div></td>
      <td width="52%"><?php echo "<textarea name=\"comments\">$comments</textarea>"; ?></td>
    </tr>
    <tr> 
      <td>&nbsp;</td>
      <td width="52%">&nbsp;</td>
    </tr>
    <tr> 
      <td height="16">&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr> 
      <td colspan="2"><div align="center"> 
	      <input type="hidden" name="z" value="1">
          <input type="submit" name="Submit" value="Submit Feedback">
          <input type="reset" name="Submit2" value="Clear Form">
        </div></td>
    </tr>
  </table>
</form>
</fieldset>
</body>
</html>

execute

woops forgot PHP tags, used code

madwormer2

Use [ php ] tags

Dunno wot ur prob is tho.

execute

What reasons, would the Parse engine, PHP engine, give a white blank page for? What would cause that?

cmancone

Ah. Shorter script. I made some changes and got this to run on my server:

<?php
session_start();
$username = $_SESSION['username'];
$email = $_SESSION['email'];

 $username = $_POST['username'];
 $email = $_POST['email'];
 $comments = $_POST['comments'];

 stripslashes($username);

 if ((!$username) || (!$email) || (!$comments)) {
  $error = "Sorry but please fill in all the required fields.";
 }
else
{

 $_SERVER['REMOTE_ADDR'] = $REMOTE_ADDR;
 $ip = $REMOTE_ADDR;
 $to = "ME@ME.com";
 $date = date("l, F j, Y");
 $time = time();
 $subject = "Feedback ^^";
 $msg = "Feedback from $username.
@ $email!!!
 His comments are:
 $comments \n\n

 At: $ip   |  $date | $time";
 $mailheaders = "From: Feedback<ME@ME.com>";
  mail($to, $subject, $msg, $mailheaders);
 $error = "Successfully submitted your feedback form! We will reply to your input as soon as possible. Thank you!";

}
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="stylesheet" href="style.css" type="text/css">
</head>

<body>
<fieldset><legend align="center">Feedback</legend><br>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
  <table width="98%" border="0" cellspacing="0" cellpadding="0">
    <tr>
      <td colspan="2"><div align="center"><?php echo $error; ?></div></td>
    </tr>
    <tr>
      <td width="48%"><div align="right">Name:</div></td>
      <td width="52%"><?php echo "<input type=\"text\" name=\"username\" value=\"$username\">"; ?></td>
    </tr>
    <tr>
      <td><div align="right">E-Mail:</div></td>
      <td width="52%"><?php echo "<input type=\"text\" name=\"email\" value=\"$email\">"; ?></td>
    </tr>
    <tr>
      <td><div align="right">Comments/Suggestions/Questions/Praises:</div></td>
      <td width="52%"><?php echo "<textarea name=\"comments\">$comments</textarea>"; ?></td>
    </tr>
    <tr>
      <td>&nbsp;</td>
      <td width="52%">&nbsp;</td>
    </tr>
    <tr>
      <td height="16">&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td colspan="2"><div align="center">
          <input type="submit" name="Submit" value="Submit Feedback">
          <input type="reset" name="Submit2" value="Clear Form">
        </div></td>
    </tr>
  </table>
</form>
</fieldset>
</body>

First off, the whole "$z" variable is completely uneccessary. That was what was causing your problem. You said "if ($z = 1)", which is always true because that is an assignment, not a comparison. So, it was executing that error section of your script, which includes and exit, which was exiting without outputting anything (hence the blank page). If you just changed it to if ( $z == 1 ), it would work as you meant it to work. However, the whole $z bit is competely unecessary, so I took it out of the above code. Instead, all you have to do is use an else statement. Then the mail() function will only be called when you want it too. Besides, with the exit you weren't printing out anything. Now it actually prints out your error.

I would recommend you search your other script for exit; as well. Chances are you have an exit getting called somewhere that is causing your problem. In fact, search through the whole script for every exit, and put a line above it: print "exit number" and put a new number each time. Chances are your script will print out exactly one line, corresponding to the place that it exited.

execute

Thank you so much... Youre a genius 😉
I thought exit was different from die
I thought that you could type exit and it will skip the code and jump to html
but i guess to fix it you need to use include the same file so i can show the form together with the error message

execute

But im very confused about the = and == when testing it in an if statement heres why:

<?php
#when i am testing whether someone has logged in for example:

$query = mysql_query("SELECT * FROM members WHERE username='$username' AND password='$password'") or die("Error Query");
$row_nums = mysql_num_rows($query);

if ($row_nums == 0){
$sorry = "Sorry You cannot log in";
include("login.php");
exit();
}
?>

if i do... $row_nums == 0.... it always gives the error message. It will always say Sorry, you cannot log in, even though there is a row with the queried info. Howevr if i change it to:
$row_nums = 0....
Then the script works fine.
Why is that ? I assumed that Numbers ... in order to test them you need =...
and when testing Strings, u use ==...
if this is not true, then why does this happen? (above)

Weedpacket

= and == are different things and do different things.

If you write

if($row_nums=0)
{
  ...
}

Then you're setting $row_nums to 0. And because that's equivalent to false, the test fails and the $sorry, include, exit() bit is skipped. You'd always get logged in even if there wasn't a suitable row in the table. I'd hardly call that "working fine"!

If all you're doing there is counting members, a smarter query would be

$query = "Select count(*) from members where username='$username' and password='$password'";
$result = mysql_query($query);
$count=mysql_result($result,0);
if($count==0) // Yes, _DOUBLE =_
{
  $sorry....
  exit;
}