What are best practices for handling true or false return values in PHP functions to ensure accurate results?

When handling true or false return values in PHP functions, it is important to ensure that the function returns the correct boolean value. To do this, always explicitly return true or false instead of relying on truthy or falsy values. This helps to avoid any ambiguity and ensures accurate results in your code.

function isEven($num) {
    if ($num % 2 == 0) {
        return true;
    } else {
        return false;
    }
}

// Example usage
$result = isEven(4);
var_dump($result); // Output: bool(true)