In what scenarios would it be more appropriate to use isset() instead of empty() when checking the status of a variable in PHP?

When checking the status of a variable in PHP, it is more appropriate to use isset() when you want to determine if a variable is set and is not NULL. isset() will return true if the variable exists and has a non-null value, while empty() will return true if the variable is an empty string, zero, NULL, or not set at all.

// Using isset() to check if a variable is set and not NULL
if(isset($variable)) {
    // Variable is set and not NULL
    // Do something with the variable
} else {
    // Variable is either not set or NULL
    // Handle the case accordingly
}