Help on php not working with <input type>

youngsei

Hi, I've just started using php for one week and I really need help on the following code! Basically, I am trying to do a simple login submit and if username/password verified, it will move to next html/php page. I have a few questions:

1) How does php know that $username is from the form input name=username?

2) The example I was using was from http://www.zend.com/codex.php?id=242&single=1
I changed to the code below. When I asked it to write to write.txt for both $username and $password, the content was username is password is. Did I miss something?

2) Eventually, I would like to change the fopen to be "fopen( "nextpage.html", "r" )". But, the replacement doesn't work. What did I do wrong? I read about fpassthru do I need that to make the page automatically go next?

Please help!!!

Thanks!!

Here's the code:

<?php
function loginForm() {
global $PHP_SELF;

$header = '<HTML><HEAD><TITLE>PHP Login</TITLE></HEAD><body>;
$footer = '</BODY></HTML>';

echo $header;

?>
<FORM method="post" name="loginform" action="<?php doLogin(); ?>">
<TABLE ALIGN="CENTER">
<TR>
<TD>
<B><FONT COLOR="#336633" SIZE="+2">Username:</FONT></B>
</TD>
<TD>
<INPUT type="text" name="username" id="username" size="20" maxlength="16">
</TD>
</TR>

 <TR>
   <TD></TD>
 </TR>

 <TR>
   <TD>
     <P ALIGN="CENTER">
     <B><FONT COLOR="#336633" SIZE="+2">Password: </FONT></B>
   </TD>
   <TD>
     <P ALIGN="CENTER">
     <INPUT type="password" name="password" id="password" size="20" maxlength="16"></P>
   </TD>
 </TR>

 <TR>
   <TD></TD>
 </TR>

 <TR>
   <TD>
     <P ALIGN="LEFT"></P>
   </TD>
   <TD>
     <P ALIGN="LEFT">
       <INPUT type=submit name="sent" id="sent" value="login">
       <INPUT type="reset" name="reset" value="clear">
     </P>
   </TD>
 </TR>

</TABLE>
</FORM>

<?php
echo $footer;
}

function doLogin() {
global $PHP_SELF, $sent, $username, $password;

$fp = fopen( "write.txt", "r+" );
fwrite( $fp, "username is $username\n" ); <--- in write.txt, both username and password
fwrite( $fp, "password is $password\n" ); <--- are blank.
fclose( $fp );
if( !$login_ok ) {
return 0;
}
}

// main

// Initializing Variables
$url = basename( $PHP_SELF );

if( !doLogin() ) {
loginForm();
}

if( (isset( $sent ) ) ) {
echo "Login successful ";
echo "for login name: <b>" .$username."</b><br>";
echo "<br><br><br><a href='nextpage.html'>Proceed</a>";
}
?>

Sayonara

$fp = fopen( "write.txt", "r+" );

Opening the file in write only mode.

That can't be helping.

youngsei

I used $fp = fopen( "write.txt", "r+" );
as a debugging purpose so I can see what are the values for $username and $password. Any suggestions as to how to debug it? I try "echo" but rather it parse out as url and gives me page not found error.

Sayonara

OIC.

Hmmm.

I think the way you're handling the form data is odd but I can't put my finger on why, sorry.

jnuneznyc

The whole page is wrong. What is it that you want to do? Do you just want to write the name and password to a txt file or do you want to check the file to see if user exists?

Also the <form>'s action should go to <?=basename($PHP_SELF);?> which is the page's file name.

In the section before the form you should check for the following values:

<?
if( isset($HTTP_POST_VARS['username']) ) && isset($HTTP_POST_VARS['password']) ){
    //Check the account here then redirect and exit();
}
?>
<!-- Login Form below this line -->

youngsei

Thank you very much for the help!

I set the form action to basename( $PHP_SELF ) and I have to use $_POST instead of $HTTP_POST_VARS to make it work. As soon as I made the changes, I was able to redirect to the nextpage!

Thank you very much again for your help!!