$_REQUEST is not an indexed array, but associative. This means that values
can only be retrieved by keys.
The page is requested with a parameter foo with the value bar, as in:
If you want to print 'bar', you should do it like this:
But, you can get the values of the an associative array as an indexed array
through the array_values function:
$values = array_values($_REQUEST);
Afterwhich you can retrieve the values by their index:
print $value; // 1 is the second index as 0 is always the first index
Please have a close look at the online manual starting at
http://www.php.net/manual/en/index.php to prevent asking basic questions
like this in the future.