The memory_limit is only applicable if ___ is enabled when you configure PHP. Fill in the blank.

What is the default value of max_execution_time directive? This directive specifies how many seconds a script can execute before being terminated.

Which one of the following statements should be used to disable the use of two classes administrator and janitor?

Which of the following statements is used to add an attachment to the mail?

Which one of the following statements should be used to disable just the fopen(), and file() functions?