Added some more info

PHP.md

@@ -1 +1,18 @@
 #Setting up PHP
+
+## Use Flags
+
+In order for PHP to be most useful, it should have as many of the modules installed as will be used. I recommend installing it using the FPM sapi, which manages php session spawning. 
+
+Here are some recommended flags:
+`mysql utf8 threads -readline libssh2 -cgi fpm xcache suhosin postgres mysqlnd reflection session simplexml sockets spl pdo mbstring sqlite3 mysqli soap`
+
+## PHP_TARGETS
+
+The `PHP_TARGETS` setting in `/etc/make.conf` lets you select which versions of PHP to compile. If possible, I recommend always using the latest stable version. 
+
+As of the time this is written, php 5.3 is the latest version, so I would add this line to `/etc/make.conf`
+
+`PHP_TARGETS="php5-3"`
+
+As of this writing, PHP compiles with clang reliably. 

Setup.md

@@ -1 +1,14 @@
 # General Setup
+
+## Install LLVM/Clang
+
+Clang is a faster compiler than the default GCC. It produces binary as fast, or faster than GCC. To set up clang, 
+
+run `emerge llvm clang`
+
+and add these to lines to the top of your `/etc/make.conf` file
+
+	CC=/usr/bin/clang
+	CXX=/usr/bin/clang++
+	
+If a package fails to compile with clang, you can comment out those lines, and recompile the package with GCC.