What is the difference between using return and exit commands in PHP functions?

When writing PHP functions, it is important to understand the difference between using the return and exit commands. The return command is used to return a value from a function and continue executing the rest of the script. On the other hand, the exit command is used to immediately terminate the script and return a specified exit code. It is recommended to use the return command within functions to ensure proper execution flow, while the exit command should be used only when it is necessary to stop the script completely.

// Using return command in a function
function add($a, $b) {
    $sum = $a + $b;
    return $sum;
}

$result = add(5, 3);
echo $result; // Output: 8