MySQL 4.1.22 - 5 changes

Anyone know what changed on the jump to MySQL 5 from MySQL 4.1.22 Standard? And does anyone know a site where you can find a tutorial for MySQL 4.1.22 Standard? I looked on mysql.com, but they had it in Javascript, I need one written so its in PHP, not Javascript.

To do what within the database?

Anything, just like some major new things you can do with MySQL 5 that you can't with MySQL 4.1.22.

I think probably very little. I know the names of some commands have changed. Maybe mySql has a changelog?

EDIT:

And thy lord google shalt provideth:
http://dev.mysql.com/doc/refman/5.0/en/news-5-0-x.html

Edwin Out.

Haha, thy lord google, I like your phrasing.

Thank you