Install PHP 5.6 in OSX 10.10 using Homebrew
I like to replace the default php install in OSX with a more recent version. I'll show you the steps in order to easily do it.
Taps
dupes:
$ brew tap homebrew/dupes
versions:
$ brew tap homebrew/versions
homebrew-php:
$ brew tap homebrew/homebrew-php

Options
To see a list of available configuration options run:
$ brew options php56
Install
And install quite easily:
$ brew install php56
After your dependencies are isntalled it should finish off with php:

That wasn't hard at all.
Now, I only really use PHP CLI, so I need to update my .zshrc file (.bashrc if you use bash instead of zsh). I just add this to the end:
# Homebrew PHP CLI
export PATH="$(brew --prefix homebrew/php/php56)/bin:$PATH"
After reloading your terminal and typing which php you should see the new version:

There are more detailed instructions here if this isn't what you were looking for.