Form question

I want to have a value, starting at zero, so if radio button value="B" id="one" is checked then the value goes up one, how can this be done?

Please could you give some more info! Do you want the value to be saved on the server? Do you want it in a textfile or DB, or a session?

A text file, let's call it saveto.txt here (another part of the script will control that).

Try something along the lines of:

<?php

$file = "saveto.txt";

$fp = fopen($file, 'r');

while(!feof($fp)){
$str_val = fgets($fp, 32); // not expecting the file do contain more than 32 bytes (32 digit number)
}

fclose($fp);

settype($str_val, 'int');

if($_POST['one'] == 'B'){

$str_val++;
$fw = fopen($file, 'w');
fputs($fw, $str_val);
fclose($fw);


}

?>

What is that w, r and int for?

r and w are file handling modes, see http://www.php.net/fopen. int tells the script to make sure the result is an integer, so we can preform mathmatical operations on it (see http://www.php.net/settype)

What does it put in the document?