Cannot Define Multiple Default Branches In a Switch

As of PHP 7.0.0, defining multiple default cases emits a fatal error. Prior to that, only the last default case would be executed:

switch (true) {
    default:
        echo 'not executed';
        break;
    default:
        echo 'executed';
}

See execution result.

Solution

Since only the last default case ever had an effect, any previous default cases can be safely removed:

switch (true) {
    default:
        echo 'executed';
}

Errors or Warnings

• Switch statements may only contain one default clause

See Also

• RFC: Make defining multiple default cases in a switch a syntax error