I have my LAMP stack and other things set up on my mac with the wonderful Homebrew.
I recently did a
brew upgrade on my system and it seemed that everything went smooth. But when I later ran PHP from the command line I got this error:
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/Cellar/memcached-php/2.0.1/memcached.so' - dlopen(/usr/local/Cellar/memcached-php/2.0.1/memcached.so, 9): Library not loaded: /usr/local/lib/libmemcached.9.dylib Referenced from: /usr/local/Cellar/memcached-php/2.0.1/memcached.so Reason: image not found in Unknown on line 0
I poked around in my php.ini to see if the wrong file was being included or something like that, but it turned out that I had upgraded to a newer version of libmemcached than the one memcached was using. So I needed to downgrade libmemcached. Here is how to switch to any version available with Homebrew:
brew versions libmemcached
Find and note the version number you want. In my case I wasn't sure, so I just went with the second newest and that worked.
brew switch libmemcached 1.0.4
Change the version number and the formula above to whatever makes sense for what you are doing.
The example above is using a command that is an external command for Homebrew. It works super fast and is easy to use.