php - check if $_POST is array?

Question

I know this may be a silly question, but I come across a snippet of php code that check if the $_POST is_array() before execute other functions.

Answer 1

• $_POST is a superglobal and is always defined (always exists) and is always an array
• this is true, even if it doesn't contain any elements
• it is possible though, if not advisable and I've never seen it, to overwrite or unset it
• you don't need isset() and is_array() for the $_POST array but you will quite often need them for elements in the $_POST array