These tutorials are written by DoD, a talented scripter who's the owner and administrator of Settlers Nation, and a co-administrator of Webmaster's Resources. As he said in the first tutorial, he doesn't mind being insulted, so don't hesitate e-mailing him and I'll pick up your remains after Dragon of Death is done with you . . . ok I might be exaggerating a bit :)

PHP Tutorial 1 - An Introduction
PHP Tutorial 2 - Echo(), Include() and Variables