[RESOLVED] Radio Button Values Passed to Script

[artnow]

Hi there

I have a form that gives users "Yes" and "No" radio buttons to answer a number of different questions. If the user choses "Yes" for one question, I want the form processing script to do something. If they answer "No" then there's nothing for the processing script to do. Each question has a different set of radio buttons and each set is named differently.

For example:

              // Question One
              <input type="radio" name="qone" value="qone">Yes 
              <input type="radio" name="qone">No

          // Question Two
          <input type="radio" name="qtwo" value="qtwo">Yes 
          <input type="radio" name="qtwo">No

In the processing script I begin with checking whether the "Yes" or the "No" option was chosen:

if (!empty($_POST[qone]))
{
do stuff ....
}

if (!empty($_POST[qtwo]))
{
do stuff ....
}

The problem is that the processing script seems to consider the users choice as "Yes" regardless of which radio button was chosen and I don't know why.

[steamPunk]

maybe it considers that as you don't define a "no" value then the "yes" value is valid for both states - this is just a guess

try assigning a value of 1 for Yes and 0 for No and then testing for the value of the incoming POST variables $_POST[qone]

in fact, having just re-read your post, you're testing if the POST vars are empty, which they're probably not in either state

[Bonesnap]

Use isset() instead of empty(), and check the actual value of the radio button (you'll have to give them all values).

[artnow]

I don't have access to the script at the moment so I can't actually test this until tomorrow but this is what I have put together in the meantime. I have given the "Yes" and "No" buttons value of 1 and 0 respectively ...

              <input type="radio" name="qone" value="1">Yes 
              <input type="radio" name="qone" value="0">No 

          <input type="radio" name="qtwo" value="1">Yes 
          <input type="radio" name="qtwo" value="0">No

And in the processing script I am checking to see if the value is 1 and if it is, run the rest of the script, otherwise do nothing.

if ( ($_POST['qone'] ) == '1'
{ 
do stuff .... 
} 

if ( ($_POST['qtwo'] ) == '1' 
{ 
do stuff .... 
} 

I couldn't wrap my head around isset() in relation to one of my previous problems but I will give it a go tomorrow when I can work on the actual script. Is one way better than the other?

[steamPunk]

isset() is very useful as an initial condition because it just tests if the var exists (and is not NULL) - so you can use it to do stuff only if the var is received

then once you know you've received the var you can test its value - or whatever

if(isset($_POST['qone'])){
   $sql = "UPDATE `table` SET `field`=".$_POST['qone']." WHERE ... etc";
}

or

if(isset($_POST['qone'])){
   if($_POST['qone']=='1'){
      // do this    

   }else{
     // do something else
   }
}