Securing PHP

Hi all, You've all likely heard this before...."I was hacked..." , "Had register globals on..." etc etc. Well, this is true of me as well. Does anyone know of a site that would help a semi professional lock down php, i.e. Perhaps how to install phpsuexec, Jail users to only have the ability to read/write to thier own files and directories, php.ini directives that have simiar affect as mentioned above. Any help appreciated. -Grant