Question: . Question No. 1 (Marks 3) What is a function? How do we use it in PHP? Give an example of a function which returns

. Question No. 1 (Marks 3) What is a function? How do we use it in PHP? Give an example of a function which returns a value and a function which does not return a value. Question No. 2 (Marks 2) How do we use global variables in PHP? Give examples. Question No. 3 (Marks 2) Can we use variable number of arguments for a function in PHP? How? Give example. Question No. 4 (Marks 3) What is a variable function? How can we use it PHP? Give examples

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