PHP_POST_VARS and init of Radio buttons

tomgone

Hiya all,

Quick question: I have a form with numerous radion buttons, all in a standard format, and I want to check first of all if they have all been filled in. Problem though is that a radio group that has not been checked wont have a value passed in HTTP_POST_VALS? I can get around it by "initalising" each radio group by a hidden element, but that seems a bit of a quick-fix?!?

i.e. what I do now is

So if the first line is not included, and the user does not pick yes/no, HTTP_POST_VARS does not include this radio group?

Cheers
TG

mrskhris

n this case you have to check is this variable was set at all.
isset($HTTP_POST_VARS[radio_group_button_name]) It returns boolean value.

tomgone

There is still a problem with that though, as I can not loop through the variables as I need to know the names. What I would ideally like to do, is just loop through HTTP_POST_VARS and then check each one if they have a value.

First solution was to check each and one, but as I use the same test on each (over 30 radio group on each form, and many forms) it does seem like such a waste, when a very simple loop could do exactly the same thing?

mrskhris

If I understand you right, this piece of code could help:

$variable_names=array_keys($HTTP_POST_VARS);
for($i=0;$i<count($variable_names);$i++){

Do you checking here

}

tomgone

I am using something similar to that now. The original problem (which still remains sort of) was though that any radio button group that is not selected will not be included in $HTTP_POST_VARS. To get around this I have now "initialised" each radio button group by adding a hidden element with the same name and a default value of "". If a radio button is selected, the default is over written, if not it remains "". Then I can use code like yours to check for "" and then take appropriate action.