<?php
class Lala {
const a = "a";
const b = a . "b";
}
?>
Parse error: syntax error, unexpected '(', expecting ',' or ';' on line 4
What's the problem with it?
From the documentation:
The value must be a constant expression, not (for example) a variable, a property, a result of a mathematical operation, or a function call.
See http://www.php.net/manual/en/language.oop5.constants.php