Posted by grossespinne on 06/22/07 22:18

Hi everybody!
I have been thinking over the following problem:
there are three classes: PageBase, which is the base class, PageA and
PageB which are the subclasses of PageBase.
In the index.php file I have a variable which I like to hold either an
instance of PageA or PageB depending on the query string that is
passed to index.php (e.g: if I get the query index.php?content=a, I
need an instance of PageA, but if I get the query: index.php?
content=b, an instance of PageB is needed)

Until now I found two solutions, but I am not satisfied with either of
them:
- use a switch structure
- or use eval:

$pageType = isset($_GET["page"]) ? $_GET["page"] : "PageBase";
$thePage = eval("return new $pageType();");

My question is whether a more object-oriented way exists to solve the
problem.

TIA

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