'isset()' and '!empty()'

Question

What's the difference between 'isset()' and '!empty()' in PHP?

Answer 1

ISSET checks the variable to see if it has been set. In other words, it checks to see if the variableis any value except NULL or not assigned a value.
ISSET returnsTRUEif the variable exists and has a value other than NULL. That means variables assigned a "", 0, "0", or FALSE are set, and therefore are TRUE for ISSET.

EMPTY checks to see if a variable is empty. Empty is interpreted as: "" (an empty string), 0 (integer), 0.0 (float)`, "0" (string), NULL, FALSE, array() (an empty array), and "$var;" (a variable declared, but without a value in a class.

- Stackoverflow

Answer 2

Good