On Mon, 2007-10-22 at 18:07 +0100, Stut wrote:
> Adam Williams wrote:
> > I have an html page with checkboxes:
> >
> > <form action=mailform2.php method=POST>
> > <input type=checkbox name=option[] value="Modern Mississippi">Modern
> > Mississippi<br>
> > <input type=checkbox name=option[] value="Civil Rights">Civil Rights<br>
> > <input type=checkbox name=option[] value="Military
> > History">MilitaryHistory<br>
> > <input type=submit name=submit value=Submit>
> >
> > and mailform2.php containing:
> >
> > echo "you selected: <br>";
> > /* line 81 */ foreach ($_POST[option] as $a)
> > {
> > echo "$a";
> > }
> >
> > but I'm getting the error:
> >
> > you selected:
> >
> > *Warning*: Invalid argument supplied for foreach() in
> > */var/www/sites/mdah-test/museum/mmhsurvey/mailform2.php* on line *81*
> >
> > I googled some checkbox/foreach pages on google, but I don't see where
> > I'm going wrong. I'm running php 5.2.5 on Apache 2.2.4 on Fedora
> > Linux. Any help?
>
> Turn notices on. You will then get lots of notices about the use of an
> undefined constant "option".
>
> You should be using $_POST['option'] instead - notice the quotes.
>
> Your HTML should really have double quotes around the attributes but
> that's beyond the scope of this list.
He's still going to get an invalid argument warning though since PHP
will automatically convert the unquoted key to a string and then look up
the value. The problem is that the value doesn't exist or is not an
array as expected.
Cheers,
Rob.
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