Why does my OS X still run older php even though I updated it?
It seems as you did not add the new path to your $PATH.

Citing the FAQ of the website that you have posted:


  Why does php -v on the command line still show my old version?
  
  php-osx doesn't overwrite the php binaries installed by Apple, but installs everyting in /usr/local/php5. The new php binary is therefore in /usr/local/php5/bin/php.
  
  You can also adjust your PATH do include that directory, eg. write into your ~/.profile file the following
  
  export PATH=/usr/local/php5/bin:$PATH


So open you .profile or .bash_profile in a editor like nano or vim and add the last line export PATH=/usr/local/php5/bin:$PATH to the appropiate file.

Source your file with source ~/.bash_profile or source ~/.profile or close and reopen your terminal.