All values should be undefined:
$a =  
$b =  
$c =  
$d =  
$e =  
First of all assign a value:
Now we have some 'Umlaute':
Now lets look what we are getting from this:
(this is the value in $a) (this is the value in $a) 
 äöü
And now a and b together: (this is the value in $a)(this is the value in $a) 
 äöü
Here we have some HTML tags within the perl code, 
Embperl will not delete them when optRawInput is set !
<BR> 6 + 17 <font size="3"> * 3
Here we have something which looks like a HTML tag, but does not start with
a character, Embperl does not change them!
SELECT * FROM a ORDER BY b USING <; Hi There>
Embperl will not translate HMTL escapes to the right characters 
when optRawInput is set
2 < 6
Now they should have a value
$a = (this is the value in $a) 
$b = (this is the value in $a) 
 äöü 
$c = <BR> 6 + 17 <font size="3"> * 3 
$d = 2 < 6 
$e = 2 
Ok.
optRawInput is now: 1 
optRawInput is set now to: 1 
optRawInput is now: 1 
<BR> 6 + 17 <font size="3"> * 3
Now lets look what we are getting from this:
$a = (this is the value in $a) 
$b = (this is the value in $a) 
 äöü 
$c = <BR> 6 + 17 <font size="3"> * 3 
optRawInput is now: 1 
optRawInput is set now to: 0 
optRawInput is now: 0 
<BR> 6 + 17 <font size="3"> * 3
Now lets look what we are getting from this:
$a = (this is the value in $a) 
$b = (this is the value in $a) 
 äöü 
$c = <BR> 6 + 17 <font size="3"> * 3