The difference between the isset () function and the empty () function in PHP

First, both of these functions are used to test the state of a variable:

• The Isset () function determines if a variable returns true if it is present, otherwise it returns false.
• The empty () function determines whether a variable is null if NULL returns True otherwise returns False if the value of the variable is 0 The function returned is also empty this is the difference between the two if you want true its value should be non-null and not 0;

The result of the page output is: If 0 is empty.