What does the value attribute mean for checkboxes in HTML?

Question

Suppose this checkbox snippet:

<input type="checkbox" value="1">Is it worth?</input> 

Is there any reason to statically define the value attribute of checkboxes in HTML? What does it mean?

Answer 1

I hope I understand your question right.

The value attribute defines a value which is sent by a POST request (i.e. You have an HTML form submitted to a server). Now the server gets the name (if defined) and the value.

<form method="post" action="urlofserver">     <input type="checkbox" name="mycheckbox" value="1">Is it worth?</input> </form> 

The server would receive mycheckbox with the value of 1.

in PHP, this POST variable is stored in an array as $_POST['mycheckbox'] which contains 1.

Answer 2

I just wanted to make a comment on Adriano Silva's comment. In order to get what he describes to work you have to add "[]" at the end of the name attribute, so if we take his example the correct syntax should be:

<input type = "checkbox" name="BrandID[]" value="1">Ford</input> <input type = "checkbox" name="BrandID[]" value="2">GM</input> <input type="checkbox" name="BrandId[]" value="3">Volkswagen</input> 

Then you use something like: $test = $_POST['BrandID']; (Mind no need for [] after BrandID in the php code). Which will give you an array of values, the values in the array are the checkboxes that are ticked's values.

Hope this helps! :)