undefined index

[news.bigpond.com]

getting errors

Notice: Undefined index: name in F:\uni\Software
engineering\ass ignment4\guestb ook.php on line 6

the variable $name is declared as $name = _POST["name"];

What could be causing this?

I've recently installed php 5 on IIS with mysql 4. All running on windows XP

downloaded code straight from my uni's tute site.

went to run it and it sort of runs but I get these errors at the top of the
page.

Thanks

Karl.

[nice.guy.nige]

Re: undefined index

While the city slept, news.bigpond.co m (khmueller@bigp ond.com) feverishly
typed...
[color=blue]
> getting errors
>
> Notice: Undefined index: name in F:\uni\Software
> engineering\ass ignment4\guestb ook.php on line 6
>
> the variable $name is declared as $name = _POST["name"];[/color]

Is this a typo in your post? Or does it appear *exactly* the same in your
code? It should be $name = $_POST["name"];

Cheers,
Nige

--
Nigel Moss

http://www.nigenet.org.uk

Mail address not valid. nigel@DOG.nigen et.org.uk, take the DOG. out!
In the land of the blind, the one-eyed man is very, very busy!

[kingofkolt]

Re: undefined index

"news.bigpond.c om" <khmueller@bigp ond.com> wrote in message
news:%nb1d.2904 5$D7.28671@news-server.bigpond. net.au...[color=blue]
> getting errors
>
> Notice: Undefined index: name in F:\uni\Software
> engineering\ass ignment4\guestb ook.php on line 6
>
> the variable $name is declared as $name = _POST["name"];
>
> What could be causing this?
>
> I've recently installed php 5 on IIS with mysql 4. All running on windows[/color]
XP[color=blue]
>
> downloaded code straight from my uni's tute site.
>
> went to run it and it sort of runs but I get these errors at the top of[/color]
the[color=blue]
> page.
>
> Thanks
>
> Karl.
>
>[/color]

In $_POST['name'], 'name' is the undefined index if no 'name' has been
POSTed. For example, if you have a form whose action is itself, and in the
form php file you refer to $_POST['name'], 'name' is undefined until the
form is submitted.

- JP

[Ian.H]

Re: undefined index

On Mon, 13 Sep 2004 17:48:54 GMT, "kingofkolt "
<jessepNOSPAM@c omcast.net> wrote:
[color=blue]
>"news.bigpond. com" <khmueller@bigp ond.com> wrote in message
>news:%nb1d.290 45$D7.28671@new s-server.bigpond. net.au...[color=green]
>> getting errors
>>
>> Notice: Undefined index: name in F:\uni\Software
>> engineering\ass ignment4\guestb ook.php on line 6
>>
>> the variable $name is declared as $name = _POST["name"];
>>
>> What could be causing this?
>>
>> I've recently installed php 5 on IIS with mysql 4. All running on windows[/color]
>XP[color=green]
>>
>> downloaded code straight from my uni's tute site.
>>
>> went to run it and it sort of runs but I get these errors at the top of[/color]
>the[color=green]
>> page.
>>
>> Thanks
>>
>> Karl.
>>
>>[/color]
>
>In $_POST['name'], 'name' is the undefined index if no 'name' has been
>POSTed. For example, if you have a form whose action is itself, and in the
>form php file you refer to $_POST['name'], 'name' is undefined until the
>form is submitted.
>
>- JP
>[/color]


PHP5 requires some extra checks AFAIU. You'll now need to use code such
as:


if (isset($_POST['name'])) {
/* do something with $_POST['name']... */
} else {
/* $_POST['name'] is undefined */
}


HTH =)



Regards,

Ian

--
Ian.H
digiServ Network
London, UK

http://digiserv.net/

[Daniel Tryba]

Re: undefined index

Ian.H <ian@windozedig iserv.net> wrote:[color=blue]
> if (isset($_POST['name'])) {
> /* do something with $_POST['name']... */
> } else {
> /* $_POST['name'] is undefined */
> }[/color]

array_key_exist s would be better in general...

From http://nl2.php.net/array_key_exists
"Example 2. array_key_exist s() vs isset()

isset() does not return TRUE for array keys that correspond to a NULL
value, while array_key_exist s() does.
<?php
$search_array = array('first' => null, 'second' => 4);

// returns false
isset($search_a rray['first'])

// returns true
array_key_exist s('first', $search_array);
?>"

The chance of null values in POST/GET is quite minimal though :)

--

Daniel Tryba

[Ian.H]

Re: undefined index

On Mon, 13 Sep 2004 20:42:21 +0000 (UTC), Daniel Tryba
<news_comp.lang .php@canopus.nl > wrote:
[color=blue]
>Ian.H <ian@windozedig iserv.net> wrote:[color=green]
>> if (isset($_POST['name'])) {
>> /* do something with $_POST['name']... */
>> } else {
>> /* $_POST['name'] is undefined */
>> }[/color]
>
>array_key_exis ts would be better in general...
>
>From http://nl2.php.net/array_key_exists
>"Example 2. array_key_exist s() vs isset()
>
>isset() does not return TRUE for array keys that correspond to a NULL
>value, while array_key_exist s() does.
><?php
>$search_arra y = array('first' => null, 'second' => 4);
>
>// returns false
>isset($search_ array['first'])
>
>// returns true
>array_key_exis ts('first', $search_array);
>?>"
>
>The chance of null values in POST/GET is quite minimal though :)[/color]


Ahh good point.. while true, you never know and if you can cater for
it........... =)



Regards,

Ian

--
Ian.H
digiServ Network
London, UK

http://digiserv.net/