This is the only way I could get phpMyAdmin working (with MySQL) in Library/Webserver/Documents on my Mac G4 with OS X 10.4 (Tiger):
1. I downloaded CompleteMySQL from
http://www.serverlogistics.com/mysql.php and got the prefpane as a bonus;
2. I followed the instructions and was happy to find out that installing proved a piece of cake, including setting a root password;
3. I downloaded the recommended companion phpMyAdmin from
http://www.phpmyadmin.net/home_page/index.php and got the latest stable version: phpMyAdmin 2.6.2-pl1;
4. I put this file in /Library/Webserver/Documents, changed the name into just phpMyAdmin, followed the instructions and made two necessary changes in the config.inc.php file, i.e. setting the PmaAbsoluteUri and filling in the root password;
5. I made sure MySQL was running by checking the new MySQL prefpane under Other in System Preferences, then opened a browserand typed the address in the address bar:
http://localhost/phpMyAdmin and...
IT WORKED!