What are some best practices for efficiently identifying even and odd numbers in PHP?

When identifying even and odd numbers in PHP, a common approach is to use the modulo operator (%) to check if a number is divisible by 2. If the remainder is 0, the number is even; otherwise, it is odd. By using this simple logic, we can efficiently determine whether a number is even or odd in PHP.

// Function to check if a number is even or odd
function checkEvenOdd($number) {
    if($number % 2 == 0) {
        echo $number . " is even.";
    } else {
        echo $number . " is odd.";
    }
}

// Test the function with a number
checkEvenOdd(5); // Output: 5 is odd.
checkEvenOdd(10); // Output: 10 is even.