Pow F Validation: Validate form inputs according to several rules

Power Form Validation


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Is class which helps us to validate form
inputs just in few lines of code. When 
form inputs successfully pass procedure 
of validation they can be printed, inserted 
in database etc.
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With helps of this class we can  
control if is field empty or if is 
component selected, controls with help 
of Regular Expressions if is e-mail address 
entered on right way,  controls if values of t
wo components have same value, if is entered value 
in text box in form of letters, if is entered value 
in text box in form of numbers, if entered value is 
longer that given value, if entered value is shorter 
that given value, if entered value is equal with given 
value, how many components are not selected or in how many 
of them value is not entered..    
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Documentation:
http://pad.pmf.kg.ac.yu/am/index.php?action=preg_kursa&co_id=7
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Zeljko Radulovic:
http://pad.pmf.kg.ac.yu/articles/index.php?action=author