Question

I’m trying to create a little enum and I’m just stuck: Why doesn’t this work?

class.LayoutParts.php:

<?php
    class LayoutParts {
        const MAIN = 1;
        const FOOTER = 2;
    }
?>

class.SupportedLayouts.php:

<?php
    class SupportedLayouts {
        const MAIN        = LayoutParts::MAIN;
        const MAIN_FOOTER = LayoutParts::MAIN.LayoutParts::FOOTER;
    }
?>

It results the following message:

Parse error: syntax error, unexpected '.', expecting ',' or ';' in /*****/class.SupportedLayouts.php on line 4

Thanks for your help!

Regards, Flo

Answer 1

. is an operator, making LayoutParts::MAIN.LayoutParts::FOOTER; a statement, which isn’t allowed in a const or property declaration.

See here

The value must be a constant expression, not (for example) a variable, a property, a result of a mathematical operation, or a function call.