Core PHP: The Switch Statement (5.12)

Switch

Consider the following example, which displays the appropriate message for each day.

$today = 'Tue';

switch ($today) {
  case "Mon":
    echo "Today is Monday.";
    break;
  case "Tue":
    echo "Today is Tuesday.";
    break;
  case "Wed":
    echo "Today is Wednesday.";
    break;
  case "Thu":
    echo "Today is Thursday.";
    break;
  case "Fri":
     echo "Today is Friday.";
     break;
  case "Sat":
     echo "Today is Saturday.";
     break;
  case "Sun":
     echo "Today is Sunday.";
     break;
  default:
     echo "Invalid day.";
}
//Outputs "Today is Tuesday."

The break keyword that follows each case is used to keep the code from automatically running into the next case. If you forget the break; statement, PHP will automatically continue through the next case statements, even when the case doesn't match.