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Bug #20714 Error when accessing value of the textbox
Submitted: 2002-11-29 03:21 UTC Modified: 2002-11-29 03:31 UTC
From: manu_kalia at hotmail dot com Assigned:
Status: Not a bug Package: *General Issues
PHP Version: 4.2.3 OS: Windows 98
Private report: No CVE-ID: None
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From: manu_kalia at hotmail dot com
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 [2002-11-29 03:21 UTC] manu_kalia at hotmail dot com 
Hi,
i have written a small .php file which has two input boxes and an submit button. On the click of the submit button i am calling the same php page again. The form action attribute has been set accordingly and method has been set to "POST". when i open the page for the first time i get an error saying

"Undefined index: txtUserName in C:\Inetpub\wwwroot\dataauth.php on line 16"

But after the page is submitted the error does not come and i can see the value which i had entered as specified by the echo command.

The code is as follows:

<html>
<body>
<form action="DataAuth.php" method="POST">
<table cellspacing=1 cellpadding=1>
<tr>
	<td>User Name</td><td><input type="text" name="txtUserName"></td>
</tr>
<tr>
	<td>Password</td><td><input type="text" name="txtPassword"></td>
</tr>
<tr><td>&nbsp;</td></tr>
<tr>
	<td><input type="submit"></td>
</tr>
</table>
<?php echo $_POST["txtUserName"]; ?>
<?php echo $_POST["txtPassword"]; ?>

<?php 

$auth = false; // Assume user is not authenticated 
if (isset($PHP_AUTH_USER ) && isset($PHP_AUTH_PW)) 
{ 
	$dbc = new COM("ADODB.Connection");
	$dbc->Provider = "Microsoft.JET.OLEDB.4.0";
	$dbc->Open("C:\Afrea Final\Data\RegAfrea.mdb");
	$rs = $dbc->Execute("select Title,surname,Firstname from Registration where surname='$PHP_AUTH_USER' AND firstname='$PHP_AUTH_PW'");
	if ($rs->Recordcount==0)
	{
		$auth = false;
	}
	else
	{
		$auth = true; 	
	}
	$rs->Close();

} 

if ( ! $auth ) { 

    header( 'WWW-Authenticate: Basic realm="Private"' ); 
    header( 'HTTP/1.0 401 Unauthorized' ); 
    echo 'Authorization Required.'; 
    exit; 

} else { 

    echo '<P>You are authorized!</P>'; 
} 

?> 
</form>
</body>
</html>


Can i know the reason why and how can i prevent this error from coming when the page is displayed for the first time.

Thanks
Manu

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 [2002-11-29 03:31 UTC] derick@php.net 
Sorry, but your problem does not imply a bug in PHP itself.  For a
list of more appropriate places to ask for help using PHP, please
visit http://www.php.net/support.php as this bug system is not the
appropriate forum for asking support questions. 

Thank you for your interest in PHP.
 
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