Before including external.php I added print_r($_GET), because I thought that the GET-variables aren't handed over correctly. But this is not the case as you can see on my website (http://felixufer.de/?page_id=24). Another thing is, that it is always detected as an album, so probably there is something wrong with the isImage-Function.

Please have a look into it.
Thanks.

Hey felix, I looked at your problem on my last forum answering marathon but it stumped me too. What do you mean by 'php error' pavian? Coding error in sg/wp or bug in php? Howto would go down a treat!

How to include Singapore into WordPress

Install Singapore
At first you have to follow the normal installation routine. For questions how to do that have a look into docs directory.

Upload the external template of Singapore
Get the external template of Singapore.
Upload it to the templates directory.

Install Wordpress PHP Exec Plugin
Download the latest version  of the plugin: phpexec.txt.
Rename the plugin to phpexec.php and put it into your wp-content/plugins directory.
Activate the plugin from WordPress administration menu (wp-admin/plugins.php).


Create new site inside Wordpress
Now you create a "photos" page inside WordPress with the following content:

<phpcode>
<?php include("path-to-sg-directory/external.php"); ?>
</phpcode>

Don't forget to replace 'path-to-sg-directory' with the correct relative path to your Singapore directory. Don't use the absolute path, this won't work.
After creating keep a note of the page ID. You can find the ID in the WordPress administration menu (wp-admin/edit-pages.php).

Change singapore.ini
Set default_template in line 28 to external:

default_template = "external"

Change index_file_url in line 208:

index_file_url = "http://www.yoursite.com/blog/?page_id=20&"

Set the right URI to your WordPress directory and the right ID as you have noted it. The path has to be absolute.

That's it!

Workaround: Make it valid!
I noticed that the "photos" pages in WordPress aren't valid HTML. That's because of PHP Exec Plugin which puts the entered PHP code automatically into a <p>-tag. To avoid this open phpexec.php and change line 62 as follows:

$phpexec_output .= '</p><!-- begin php --><p>' . ob_get_clean() . '<!-- end php --><p>';

You need three <p>-tags and it has nothing to do with WordPress, it's just because of that PHP Exec Plugin.

You want to run a wiki? Great idea! I guess this would stop asking the same questions again and again, would make it easier to support people with problems.
If you have trouble with installing the wiki or if you need help feel free to write me an e-mail.