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php, forms, and variables

 
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peok
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Joined: 16 Jun 2003
Posts: 6
PostPosted: Sat Jul 10, 2004 5:37 am    Post subject: php, forms, and variables Reply with quote
I'm still just a few days into learning php, and I've been going though this tutorial:

Tutorial, Page 6

Anyway, it's supposed to take some input from an html form, and slap it into a page with php. Well obviously I'm running abyss, and I get php error messages, basically saying the variables I'm trying to echo/print are not defined. I switched the method to "get" so that the info was in the url, but that didn't work.

I found this link http://os17fan.cjb.net/web/php_tutorial.html in these forums, and changed "register_globals" to on in the php.ini file, but that didn't do it. Um, what does the "register_globals" do anyway, the .ini file was a bit cryptic for me. Anyway, so any ideas on why it's not picking up the variables or whatever?

thanks
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niteowl
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Joined: 30 Jun 2004
Posts: 3
PostPosted: Sat Jul 10, 2004 3:39 pm    Post subject: this may help Reply with quote
See if the following works,

In the bad_words.php file replace the variable name, $variablename, by $_POST['variablename'] if you are using the POST method for submitting the form. Otherwise, use $_GET['variablename'], if you are using the GET method.

For example, replace $yourname in the php file by $_POST['yourname'].

This has to do with the later php version has diabled the Global registration by deault.
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niteowl
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peok
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Joined: 16 Jun 2003
Posts: 6
PostPosted: Sat Jul 10, 2004 4:09 pm    Post subject: Reply with quote
Ok, tried it but I just got a slightly modified error message.

First setup was:

Code:
<html>
<head>
<title>My Form</title>
</head>
<body>

<form action="bad_words.php" method="post">

My name is:
<br><input type="text" name="YourName">
<p>My Favorite Dirty Word is:
<br><input type="text" name="FavoriteWord">
<p>

<input type="submit" name="submit" value="Enter My Data!">
</form>

</body>
</html>


and

Code:
<html>
<head>
<title>Perv!</title>
</head>
<body>
<p>
Hi
<?php echo $YourName ?>
<p>
You like the word <b> <?php print $FavoriteWord; ?> !?! </b>

<p> You oughta be ashamed of yourself!

</body>
</html>


which returned

Code:
Hi
Notice: Undefined variable: YourName in D:\website\favwords\bad_words.php on line 8


You like the word
Notice: Undefined variable: FavoriteWord in D:\website\favwords\bad_words.php on line 10
!?!

You oughta be ashamed of yourself!


if i change bad_words.php to

Code:
<html>
<head>
<title>Perv!</title>
</head>
<body>
<p>
Hi
<?php echo $_POST[YourName]; ?>
<p>
You like the word <b> <?php print $_POST[FavoriteWord]; ?> !?! </b>

<p> You oughta be ashamed of yourself!

</body>
</html>


then I get

Code:
Hi
Notice: Use of undefined constant YourName - assumed 'YourName' in D:\website\favwords\bad_words.php on line 8
myname

You like the word
Notice: Use of undefined constant FavoriteWord - assumed 'FavoriteWord' in D:\website\favwords\bad_words.php on line 10
ooga !?!

You oughta be ashamed of yourself!


Any ideas? In php.ini I have

Code:
; Whether or not to register the EGPCS variables as global variables.  You may
; want to turn this off if you don't want to clutter your scripts' global scope
; with user data.  This makes most sense when coupled with track_vars - in which
; case you can access all of the GPC variables through the $HTTP_*_VARS[],
; variables.
;
; You should do your best to write your scripts so that they do not require
; register_globals to be on;  Using form variables as globals can easily lead
; to possible security problems, if the code is not very well thought of.
register_globals = On


(used to be "Off")

Thanks a lot for your response niteowl

Last edited by peok on Tue Jul 13, 2004 10:04 pm; edited 1 time in total
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niteowl
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Joined: 30 Jun 2004
Posts: 3
PostPosted: Sat Jul 10, 2004 5:18 pm    Post subject: Reply with quote
hey,

Looks like you have missed out the quotation marks before and after the variable names - for example, it should be $_POST['yourname'] rather than $_POST[yourname] and it should be $_POST['favoriteoword'] rather than $_POST[favoriteword].

Hope that fixes the problem.
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niteowl
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peok
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Joined: 16 Jun 2003
Posts: 6
PostPosted: Sat Jul 10, 2004 5:29 pm    Post subject: Reply with quote
It Worked! Yay! Thanks so much niteowl

um, so the is the reason the tutorial didn't work because its a bit depreciated and i need the $_GET[] or $_POST[]?

Thanks so much, once again. I'm ready to get working now I think.
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niteowl
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Joined: 30 Jun 2004
Posts: 3
PostPosted: Sat Jul 10, 2004 7:39 pm    Post subject: Reply with quote
hey peok,

No problem. After all this is what the forum is partially for.

The code in the tutorial would work if register_globals is on, which was the default in the earlier version of php. the $_POST[] method would work, however, regardless of whether register_globals is enable or not - at least that was my understanding.

Happy coding.....
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niteowl
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aprelium
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Joined: 22 Mar 2002
Posts: 6800
PostPosted: Sun Jul 11, 2004 7:30 pm    Post subject: Reply with quote
peok wrote:
um, so the is the reason the tutorial didn't work because its a bit depreciated and i need the $_GET[] or $_POST[]?

If variables can come from a GET or a POST and if you don't want to bother yourself with such a detail, use $_REQUEST[] instead. It will give you the variable value whether it comes from a GET or a POST request.
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00squeaky
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Joined: 11 May 2004
Posts: 60
PostPosted: Mon Jul 12, 2004 10:40 pm    Post subject: Reply with quote
ick.

just download the php manual off of the php site.

okay, say you have an input in your form like this:
<input name="uname" value="">

when you execute the script, make sure it is $HTTP_POST_VARS['uname'];. also, make sure your php script is on a separate page.

also, there really were not any errors, it was jst telling you an assumption ;)
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