Description:
------------
Run example #1 on PHP 5.2.5 produces parse error.

Reproduce code:
---------------
<?php
class MyClass
{
    const constant = 'constant value';

    function showConstant() {
        echo  self::constant . "\n";
    }
}

echo MyClass::constant . "\n";

$classname = "MyClass";
echo $classname::constant . "\n";

$class = new MyClass();
$class->showConstant();

echo $class::constant."\n";
?>

Expected result:
----------------
outputs 'constant value'

Actual result:
--------------
Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM, expecting ',' or ';' in /www/mydomain.com/httpdocs/class-constant-test.php on line 14