Checkbox if uncheck result another value...

ouch_

I need help on php code that assigns value to the checkbox if uncheck. I'm not sure how to code it can anyone help pls?

<input name="rules"  type="checkbox" id="rules" value="1">

bradgrafelman

Sorry.. I don't understand what you're asking...?

ouch_

Basically, when i submit a form and i checked the checkbox the value would be 1. But
if i do not check the checkbox there wont be a value assign. I wanna use php to assign a value if the checkbox was uncheck.

bradgrafelman

Oh, I see. Well, that would probably depend on how your PHP code is set up to use the data from the form, but here's a basic example:

if(!isset($_POST['rules'])) {
     $rules = 0; // here is where you set the value if one wasn't given
} else {
     $rules = $_POST['rules'];
}

Then just use $rules in your script from then on.

ouch_

oh cool...thanks.

ouch_

btw, !isset means checkbox as false?

bradgrafelman

These two expressions are equivalent:

if(!isset($var)) {

// and

if(isset($var) == FALSE) {

The ! simply negates the expression. It is a logical operator, and you can read more about these on their man page: [man]operators.logical[/man].

[man]isset/man is a PHP function that tells you whether a variable is set. In this case, we wanted to see if the 'rules' index of the $_POST superglobal was set or not, as this will tell us whether it was checked or not due to the nature of how checkboxes work in forms.

ouch_

ok.. understand better now. thanks.