Upgrade PHP on OSX 10.10 (yosemite)

Summary

First, you need to upgrade your to the latest version of XCode and reinstall XCode client tools: xcode-select --install

Even then, you may run into problems upgrading PHP:

Problems Upgrading PHP

~ $ brew upgrade
==> Upgrading 2 outdated packages, with result:
gdal 1.11.1_2, php55 5.5.19
==> Upgrading gdal
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/gdal-1.11.1_2.yosemite.bottle.tar.gz
######################################################################## 100.0%
==> Pouring gdal-1.11.1_2.yosemite.bottle.tar.gz
🍺  /usr/local/Cellar/gdal/1.11.1_2: 229 files, 34M
==> Upgrading php55
==> Downloading https://www.php.net/get/php-5.5.19.tar.bz2/from/this/mirror
######################################################################## 100.0%
Error: Permission denied - /usr/local/Cellar/php55/5.5.19
~ $ brew doctor
Your system is ready to brew.

Problems Upgrading PHP

Run the following commands and you should be set...

$ sudo chmod -R g+w /Library/Caches/Homebrew
$ brew rm zlib
$ brew update && brew upgrade
$ brew install git
$ brew install openssl
$ brew install php56 --homebrew-apxs --with-apache --with-homebrew-curl --with-homebrew-openssl --with-phpdbg --with-tidy --without-snmp

References

http://lexsheehan.blogspot.com/2013/12/while-testing-new-async-infrastructure.html http://superuser.com/questions/550305/homebrew-install-problems-permission-denied-library-caches-homebrew-formula http://stackoverflow.com/questions/25149032/brew-install-php55-intl-fails-cant-install-composer

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