[PHP + apache] apache_note() vs. apache_setenv() & apache_getenv() to transfer environmental variables from PHP into Apache?

[bbranded]

Hello, I've come across an article on placing PHP environmental variables into Apache logs. I'd prefer to code with apache_setenv() and apache_getenv(), but I'm curious if anyone has experience with this method over using apache_note()? Are there any security concerns with one over the other? Any input is appreciated. Thanks, Matt