checkbox help

willsteele

I want to run a small code block based on whether a checkbox is 'checked' or not. I tried gathering the global using post and a submit for checked as both 'checked', '' and true/false, as well as 1 or 0. Is there another way to approach validating checkbox values? I thought about running some eval() tests on the value to see what the return is (string, bool or int) but didn't quite know how to test it.

cgraz

I'm not quite sure I understand what you're attempting, but lets say you have multiple checkboxes named:

var[]

You'll get an array returned $_POST['var'] containing all of the checked checkboxes; any checkboxes that were not checked will not be a part of the array with a null value.

So if you were holding the id corresponding to a database field as the value, you could do something such as:

$query = "DELETE FROM your_table WHERE id IN ('" . implode("','", $_POST['var']) . "')";

I'm not sure if this is helpful or not as I'm not exactly sure what you're attempting to do. If you can provide some specifics I or someone else may be able to assist further.

willsteele

All I'm after is creating a page with a section of checkbox options, that, when submitted, returns segments of code based on what checkboxes are enabled...or turned on as code would have it.

void_function

if (isset($_POST['checkbox1']) do_something();
if (isset($_POST['checkbox2']) do_something();
if (isset($_POST['checkbox3']) do_something();
if (isset($_POST['checkbox4']) do_something();
...

As cgraz already explained, Checkboxes that are not set are never sent to the server. If they are, the $_POST['checkbox'] contains the value of the checkbox as supplied in html.

If you have dynamic, Javascript creation of checkboxes, name them "checkboxgroup[]" or something (as lon as it brackets like an array). The array of CHECKED checkboxes will be sent in $_POST['checkboxgroup']:

$array_of_checked_ones= $_POST['checkboxgroup'];