MySQL not working with php; and crashing apache when enabled

I just recently setup a fresh install of PHP, Mysql and Apache on my Windows 2003 server. Php is working fine and my Navicat MySQL browser can connect to my tables. However no matter what I do. MySQL doesn't show in phpInfo() even though I have the extensions in my ext folder. I installed PHP via the windows binary installer开发者_Go百科. Any idea what I'm missing? I'm pretty new to PHP is this is the first time I've tried to setup my own server I'm sure I'm missing something simple. Thanks.

--- EDIT ---

So as suggested by Alan Geleynse I added the extension to my php.ini, now Apache crashes every time I try to enable php_mysql.dll any ideas on this one? I may just restart my php from scratch if this is any more trouble.

You probably need to enable the extension in your php.ini

Search through php.ini for extension and you should see a list, some of which will be commented out. If you remove the comment for MySQL, it should load the extension.

If you do not see it, you should be able to add this line to your php.ini. Make sure that the dll listed is the one you want and is located in your extension directory.

extension=mysql.dll

Seems the issue was not only a missing php_mysql.dll but I was also missing libmysql.dll The installer still borked the install of the extension files though. Oh well it happens thanks to everyone for the help.

Probably apache crashes because of missing dll. There is probably a directory 'ext' in your php installation dir. Check whether there is a 'php_mysql.dll' file in it. Also, check for directive 'extension_dir' in your php.ini, it must point to the location of extensions directory. For example, I have php installed in 'C:\php' and 'C:\php\ext' folder in it. My php.ini contains line:

extension_dir = "C:/php/ext"

I just fixed this problem on my computer by copying libMysql.dll from the MySql server directory to c:/windows/system32/, just a few minutes ago.