What common mistakes can lead to a switch case not working as expected in PHP?

One common mistake that can lead to a switch case not working as expected in PHP is forgetting to include a `break;` statement at the end of each case block. This can cause the switch statement to "fall through" to the next case and execute unintended code. To solve this issue, make sure to include a `break;` statement at the end of each case block to prevent this behavior.

$day = "Monday";

switch($day) {
    case "Monday":
        echo "Today is Monday";
        break;
    case "Tuesday":
        echo "Today is Tuesday";
        break;
    default:
        echo "Today is not Monday or Tuesday";
        break;
}