I get this message when trying to install silverstripe:

"Your version of PHP has defined some classes that conflict with SilverStripe's. The following classes are at fault: HTTPResponse"

I'd like to get a feel for the cms before using it on one of my sites but is there anything I can do about this error? The installation doesn't complete so can't be installed.

I put this in the .htaccess file. Don't know why just read it some place but that only gives a 500 Internal Server Error.

<Directory "/public_html">
Options FollowSymLinks SymLinksifOwnerMatch
AllowOverride All
Order allow,deny
Allow from all
</Directory>

p.s. I'm not about to pay for support if I can't even get it to install.

SilverStripe has a class called HTTPResponse, and there is a custom PHP extension that defines a class of the same name, which conflicts with that.

You can either ask your host to uninstall the custom HTTP PHP extension, or you could go through the code and replace all instances of "HTTPResponse" with something like "SSHTTPResponse". It's a bit clumsy, but that's the situation as of 2.3.2.

Thank you :) That makes sense and I'll try it cheers.

I have changed all the instances of "HTTPResponse" with "SSHTTPResponse" and it looks like it worked. However I now have a file permission problem and still :( can't get it installed. The warning message is below:

Warning: fopen(/tmp/silverstripe-cache-home-thesite-public_html/manifestClassParse-_home_thesite_public_html_cms_code_AssetAdmin.php) [function.fopen]: failed to open stream: Permission denied in /home/thesite/public_html/sapphire/core/ManifestBuilder.php on line 398

Hundreds more warnings below this one, all in the tmp/ forder...

What is the right permissions to use? Most are 755
Thanks if you can help

OMG after 20 attempts I am closer than ever!!! Now I face this:

[Warning] HttpRequest::__construct() expects at most 3 parameters, 5 given
GET /?flush=1
Line 112 in /home/thesite/public_html/sapphire/core/control/Director.php

This warning was after I manually created a folder called: "silverstripe-cache" according to this 4 month old ticket:
http://open.silverstripe.com/ticket/3566

You can't say I didn't try :( Your script will forever be know to me as "The one whom won't install" lol. Really it looks very nice and I envy the people that somehow make it work but for me, I bid you farewell. What's 3 days off my life anyway :D

Fair enough. You might want to poke your head back in when 2.4.0 comes out; we're aware of the issues that gave you so much grief and hopefully we will have resolved those issues by then.

Your demo looked excellent and I was looking forward to using SilverStripe for a current project, but after wasting several hours today solving one problem after another I am moving on to something else.

I was trying to install on a Windows 2000 Server that already had Apache 2.2.14, PHP 5.2.11, and MySQL 5.0.51a installed and running a wide variety of other PHP packages live on-line. The first problem was that I had to add "RewriteBase /" to the .htaccess file in the root before I was able to start the installation process. However, that was merely the beginning of a long series of issues.

Eventually I had the "Your version of PHP has defined some classes that conflict with SilverStripe's. The following classes are at fault: HTTPResponse" message others have complained of. It wasn't practical to uninstall the conflicting PHP class, because it is being used by a number of other live websites, so I renamed all instances of "HTTPResponse" to "SSHTTPResponse" as others have had to do, changed the file name. Then after more troubleshooting to discover undocumented file and folder permission issues I received "HttpRequest::__construct() expects at most 3 parameters, 5 given."

The server I was using is configured in a very typical fashion for web serving applications. You obviously either should test to be sure SilverStripe will install and run correctly with a typical installation of Apache and PHP under Windows Server or state clearly that it won't to avoid wasting other people's time. I realize that you recommend use of the Microsoft installation program, but it only works with IIS and there is far more use of Apache than IIS in Windows Server Internet web serving applications.

FYI The naming conflict issues are being discussed on the core dev mailing list - http://groups.google.com/group/silverstripe-dev/browse_thread/thread/78a486de2e73bf92. The prefix SS_* is going to be rolled out to classes like HTTPResponse to prevent these sort of conflicts.