$ brew uninstall $(ls -1 /usr/local/Cellar/|grep php)
$ brew install php70 --with-pear php70-amqp php70-event php70-igbinary php70-intl php70-mcrypt php70-mongodb php70-pcntl php70-pdo-pgsql php70-redis php70-ssh2 php70-xdebug php70-yaml php70-ssh2 php70-lua
$ brew install --HEAD homebrew/php/php70-memcached

• –enable-maintainer-zt - ZTS (Zend Thread Safety)
• php70-memcached - Ставить только из HEAD
• homebrew/php/php70-pthreads - Ломает подключение расширений к PHP, удаление пакета brew uninstall php70-pthreads не помогвет
  

Warning: PHP Startup: Unable to load dynamic library '/usr/local/opt/php70-ssh2/ssh2.so' - dlopen(/usr/local/opt/php70-ssh2/ssh2.so, 9): Symbol not found: _executor_globals
  Referenced from: /usr/local/opt/php70-ssh2/ssh2.so
  Expected in: flat namespace
 in /usr/local/opt/php70-ssh2/ssh2.so in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/opt/php70-yaml/yaml.so' - dlopen(/usr/local/opt/php70-yaml/yaml.so, 9): Symbol not found: _basic_globals
  Referenced from: /usr/local/opt/php70-yaml/yaml.so
  Expected in: flat namespace
 in /usr/local/opt/php70-yaml/yaml.so in Unknown on line 0

Помогает только полное удаление

$ brew uninstall $(ls -1 /usr/local/Cellar/|grep php)

и установка пакетов заново

$ brew install --build-from-source php70 --with-pear php70-amqp php70-event php70-igbinary php70-intl php70-mcrypt php70-mongodb php70-pcntl php70-pdo-pgsql php70-redis php70-ssh2 php70-xdebug php70-yaml php70-ssh2 php70-lua php70-pthreads