I am trying to change a theme, to say any one of these http://www.theme4.com/free-silverstripe-themes.html]=http://www.theme4.com/free-silverstripe-themes.html]http://www.theme4.com/free-silverstripe-themes.html ?

I tried this and broke the site!

1) Uploaded new theme folders to /themes/
2) Changed SSViewer::set_theme('paddygreen'); in /mysite/_config.php

<?php

global $project;
$project = 'mysite';

global $database;
$database = "";

require_once("conf/ConfigureFromEnv.php");

// This line set's the current theme. More themes can be
// downloaded from http://www.silverstripe.com/themes/
SSViewer::set_theme('paddygreen');

?>

Got error message: Fatal error: SS_ENVIRONMENT_TYPE must be defined in your _ss_environment.php. See http://doc.silverstripe.com/doku.php?id=environment-management for more infomration in /home/useraccount/public_html/cms/sapphire/conf/ConfigureFromEnv.php on line 51

3) Changed _ss_environment.php file in root to:

<?php
define('TEMP_FOLDER', '/home/useraccount/public_html/cms/tmp');

/* Database connection */
define('SS_DATABASE_SERVER', 'localhost');
define('SS_DATABASE_USERNAME', 'apcdev_silver');
define('SS_DATABASE_PASSWORD', 'mypassword');
?>

kept getting same error.

4) Removed _ss_environment.php from root and F5

root resolved to /install.php (which has of course been removed) and returned a "Problem loading page" error. Doh!

Is there an easy way to change templates?

You need to define a database name in your _config.php file. Also, with the environment file error, you didn't actually address the constant that was undefined.

Thanks. But do you mean that:

a) SS_DATABASE_SERVER means database NAME, or that
b) I should add an extra line of code such as:

define('SS_DATABASE_NAME', 'apcdata_silver'); 

To fix the environment error you needed to add "define('SS_ENVIRONMENT_TYPE', 'dev/test/live');" to your environment file. The reason you keep getting redirected to install.php is because you haven't set the database name in your _config.php file to anything.

global $database;
$database = ""; 

Needs to have a database name. Alternatively, you can define SS_DATABASE_CHOOSE_NAME to have SilverStripe automatically generate a database name from your project name and some other information.

Thanks Andrew

Did that, but unfortunately there are yet more errors:

* Director::set_environment_type(dev/test/live)
      Line 56 of ConfigureFromEnv.php
    * require_once(/home/useraccount/public_html/cms/sapphire/conf/ConfigureFromEnv.php)
      Line 9 of _config.php
    * require_once(/home/useraccount/public_html/cms/mysite/_config.php)
      Line 5771 of manifest-main
    * require_once(/home/useraccount/public_html/cms/tmp/manifest-main)
      Line 70 of ManifestBuilder.php
    * ManifestBuilder::include_manifest()
      Line 150 of Core.php
    * require_once(/home/useraccount/public_html/cms/sapphire/core/Core.php)
      Line 61 of main.php

Warning: Director::set_environment_type passed 'dev/test/live'. It should be passed dev, test, or live in /home/useraccount/public_html/cms/03/sapphire/core/control/Director.php on line 712

Seems a lot of trouble just to change a template. Are the modules like this as well?

It takes 1 of dev, test or live, not all 3 at the same time :D.

For example define('SS_ENVIRONMENT_TYPE', 'dev'); defined a development environment.

Thanks Willr. Spotted that a while after, and changed it to "live".

Still not having much fun though. New Error from the script says:

Website Error
There has been an error

The website server has not been able to respond to your request.

It's a shame as a few of my coders suggested SilverStripe as a CMS we could use. It's just so much trouble just to change a template.

Thanks all the same.

You should change it to dev in this case so you can see the actual error message instead of this generic one. Its probably something very simple :D