How many main types of filtering are present in PHP?

 [:alpha:] can also be specified as ________ 

  The datatype best suited to store currency values is __________
 

Why do we use PHP-GTK?

Which one of the following functions is used to determine whether a class exists?

 Which directive determines how the session information will be stored? 

 Which one of the following preg PHP functions is used to take a string, and put it in an array? 

 Which one of the following is the right way to clone an object? 

 Which of the following statements causes PHP to disregard repeated error messages that occur within the same file and on the same line? 

 Which one of the following is the right description for the method getMessage() ?