PHP, Memcached インストール (Install Memcached PHP HomeBrew) ref: https://qiita.com/yasuken/items/7caae97114ae7d5487d6

file0.txt

$ brew install pkg-config

file1.txt

$ pecl install memcached

(中略)

Example:

Installing '/usr/local/Cellar/php@7.1/7.1.18/pecl/20160303/memcached.so'

file2.txt

$ php -i | grep php.ini

Example:

Configuration File (php.ini) Path => /usr/local/etc/php/7.1
Loaded Configuration File => /usr/local/etc/php/7.1/php.ini

file3.txt

$ vim vim /usr/local/etc/php/7.1/php.ini

Add write:

extension='/usr/local/Cellar/php@7.1/7.1.18/pecl/2016033/memcached.so'

file4.txt

$ php -m | grep memcached

memcached