How can errors and extra code be avoided when using switch statements in PHP?

To avoid errors and extra code when using switch statements in PHP, make sure to include a default case to handle any unexpected values. This will prevent the code from executing unintended actions or producing errors. Additionally, keep the switch statement concise by only including necessary cases to improve readability and maintainability.

// Example of a switch statement with a default case
$day = "Monday";

switch ($day) {
    case "Monday":
        echo "Today is Monday";
        break;
    case "Tuesday":
        echo "Today is Tuesday";
        break;
    default:
        echo "Invalid day";
        break;
}