Multiple checkboxes w/different values in form

Anon

Hello,

I'm developing with PHP3. Let's say I have an HTML form with 10 checkboxes all name "checkbox", each with a different value. Let's say I check them all and submit the form. The querystring would look something like this:

?checkbox=value1&checkbox=value2&checkbox=value2... and so on. On the other side, I'd expect to have an array called $checkbox with each of the values in it as in:

$checkbox[0] = "value1"
$checkbox[1] = "value2"
$checkbox[2] = "value3"
.......
$checkbox[n] = "valuen"

I was disappointed to find that this doesn't happen. Instead, the form variable is a scalar and the last value in the querystring is taken. If the method is GET, no problem. I can parse the querystring myself. But what if the method is POST? How can I do that? Has anyone discovered a workaround to this limitation. Thanks in advance for any help. To reply, remove the string "REMOVETHIS" from the email address.

-Matt

Anon

why are you naming all your checkboxes with the same name? if the checkboxes are hard coded then you can name them differently yourself. if they are being generated using values from a database then you can use the primary key of that table to uniquely identify your checkbox.

i have found to put the checkboxes in an array you have to declare them in an array on your page ie you have to code it into the HTML:
"name=checkbox[1]"

hth

ziad

Anon

This is not such an unusual practice. It is quite a common technique with Active Server Pages, for example. It allows me to know by testing only one variable whether any of the checkboxes were ticked. But, that's a good idea about coding the name of the checkbox as an array element. I can do that. Thanks.

----cut----------------
Author: ziad (195.138.227.100)
Date: 2000-06-29 11:31:11

i have found to put the checkboxes in an array you have to declare them in an array on your page ie you have to code it into the HTML:
"name=checkbox[1]"

hth

ziad

Anon

If someone doesn't mind, could you quickly expand upon the above reponses. In particular, I have a database with a table consisting of group names. The table can be updated and row/names can be added or deleted by an administrator. I would like to dynamically produce a page whereby the php script would automatically list all of the group names in the database as individual checkboxes. Thus, when a user belongs to multiple groups they can check each group that applies to them. I would then like to parse their reponses from a form PUT action and then determine which poxes they checked and add those groups to their user file approriately. Could someone maybe help by giving some general code on how one would accomplish this. Thanks in advance. Adam.

Anon

==========================================
i have found to put the checkboxes in an array you have to declare them in an array on your page ie you have to code it into the HTML:

"name=checkbox[1]"

This makes me wonder, what if the user does'nt choose ALL the options or checkboxs?
Say you have 5 elements,

checkbox[1]
checkbox[2]
checkbox[3]
checkbox[4]
checkbox[5]

If the user chose only 1 and 4, what would this do to your array? I'm new to php, so this is a little confusing.

ronnie

Anon

don't know. this still does'nt work for me.
I programmed HTML form as an array, but nope. It works with multiple select, but not with checkboxes. pretty strange...

Anon

I know it's been forever since this thread has been used, but I just stumbled across it in search of the same capability (a variable number of checkboxes) and wanted to post my results in detail since this pointed me in the right direction.

In my test html form, I made these checkbox fields (with the tags using ( and ) just in case this board strips html tags):

(form action='checkbox.php' method='post')
(input type='checkbox' name='field[1]' value='on') Field 1(br)
(input type='checkbox' name='field[2]' value='on') Field 2(br)
(input type='checkbox' name='field[3]' value='on') Field 3(br)
(input type='checkbox' name='field[4]' value='on') Field 4(br)
(input type='checkbox' name='field[5]' value='on') Field 5(br)
(input type='checkbox' name='field[6]' value='on') Field 6(br)
(input type='submit' value='Submit')
(/form)

My php file (checkbox.php) contained this:

echo "(html)(head)(/head)(body)";
$count=1;
while ($count < 7) {
echo "$count = $field$count";
$count++;
}
echo "(/body)
(/html)";

Worked like a charm! Thanks again for the info in this thread - I thought it would be much harder than it actually was.

Cheers,
John