Jan Lehnardt wrote:
> [...]
> * Constants.
>
> The Zend Engine 2.0 introduces per-class constants.
>
> Example:
>
> <?php
> class Foo {
> const constant = 'constant';
> }
>
> echo 'Foo::constant = ' . Foo::constant . "\n";
> ?>
>
> Old code that has no user-defined classes or functions
> named 'const' will run without modifications.
>
> [...]
thanks, but i think constants are not the same as readonly variables!!
a constant - as the name sais - are values that should never be changed. but
in my example
<?php
$doc = new DomDocument();
$root = new DomElement("root");
$root->tagName = "test"; // this, of course, doesn't work...
print($root->tagName);
$root = $doc->appendChild($root);
?>
the constructor (/another class-) function of DomElement has to set the
object variable $root->tagName to "root", of course. this is why tagName
isn't defined as constant...
further you CAN read $root->tagName, but not set it - so it is a real
READONLY variable, define in C-Code of Zend Engine...
anyway, thanks a lot...
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