Installing mcrypt on OSX 10.8.2 - PHP 5.3.15 with homebrew

Question

I've successfully installed mcrypt via homebrew but I'm struggling to find the path to mcrypt.so to include it as an extension in php.ini.

mcrypt was installed at /usr/local/Cellar/mcrypt/2.5.8. Tree:

-- AUTHORS
|-- ChangeLog
|-- INSTALL_RECEIPT.json
|-- NEWS
|-- README
|-- TODO
|-- bin
|   `-- libmcrypt-config
|-- include
|   |-- mcrypt.h
|   `-- mutils
|       `-- mcrypt.h
|-- lib
|   |-- libmcrypt.4.4.8.dylib
|   |-- libmcrypt.4.dylib -> libmcrypt.4.4.8.dylib
|   `-- libmcrypt.dylib -> libmcrypt.4.4.8.dylib
`-- share
    |-- aclocal
    |   `-- libmcrypt.m4
    `-- man
        `-- man3
            `-- mcrypt.3

I tried to include mcrypt.h in php.ini:

extension="/usr/local/Cellar/mcrypt/2.5.8/include/mcrypt.h"

and then restarted apache. but it didn't work.

when I run php in the terminal I get:

PHP Warning:  PHP Startup: Unable to load dynamic library
'/usr/local/Cellar/mcrypt/2.5.8/include/mcrypt.h' - dlopen(/usr/local/Cellar/mcrypt/2.5.8/include/mcrypt.h, 9): 
image not found in Unknown on line 0

Answer 1

First check if brew is up-to-date:
brew doctor

Second install mcrypt based on php version:
brew install php53-mcrypt

NB: Step three below is not required on recent versions of brew:

Third open php.ini file and add reference:
sudo vi /private/etc/php.ini
extension="/usr/local/Cellar/php53-mcrypt/5.3.25/mcrypt.so"

Finally, restart apache:
sudo apachectl restart

Answer 2

After wondering for hours through different advices, this one worked for me (Installed via MacPorts):

Courtesy of Chris Brewer:

Download and install MacPorts from http://macports.org.

The following steps are performed in the Terminal:

Force MacPorts to update (will only work if Apple's Xcode installed):

sudo port -v selfupdate

Now, install memcached:

sudo port install php5-mcrypt

Copy the newly created shared object for mcrypt into Mac OS X’s default PHP5 extension directory:

sudo cp /opt/local/lib/php/extensions/no-debug-non-zts-20090626/mcrypt.so /usr/lib/php/extensions/no-debug-non-zts-20090626/

Next, you need to edit php.ini to add the extensions. Find the phrase Dynamic Extensions, and add:

extension=mcrypt.so

And finally, restart Apache:

sudo apachectl restart