Problem with initially checked checkboxes

senorfrog

When I create a form with a checkbox initially checked,

when a user unchecks the checkbox and then presses the submit button on the form, PHP still returns POST["foo"] = "on".

How can I get PHP to return "off" (or not post at all) when a checkbox that is initially checked becomes unchecked?

Please show mercy and help me...I've been killing myself over this. Do I need to use javascript?

😕

drew010

im testing your problem with this:

<form method="POST">
<input type="checkbox" name="foo" checked><br />
<input type="checkbox" name="foo2"><br />
<input type="submit" name="sub">
</form>

<br /><br />

<?php

if($_POST) {
	echo "foo = " . $_POST['foo'] . "<br />\n";
        echo "foo2 = " . $_POST['foo2'];
}

?>

and foo is not on if i uncheck it. it works as expected. try that and see if it works right or not.

TruckStuff

Do you have a series of checkboxes all named "foo"? If so, then the value retruned will always be the value of the last checkbox, i.e. if the last foo is on and all the others are off, $_POST['foo'] will still be on. What you probably want is something like this:

<input type=checkbox name="foo[]" value="...">

senorfrog

Thanks for the help guys. Turns out I was using a big database of emails and some were duplicates, which meant I was getting duplicate name attributes which was messing up my results. But your example showed me that I was trying to do the right thing...thanks for that.