mcrypt is built in for PHP 5.3.x on windows, you don't need to do anything with a dll anymore.
Estas funciones trabajan utilizando » mcrypt. Para usarla, descargue libmcrypt-x.x.tar.gz desde » http://mcrypt.sourceforge.net/ y siga las instrucciones de instalación incluídas.
A partir de PHP 5.0.0 necesitará libmcrypt Versión 2.5.6 o superior.
Usuarios de Windows encontrarán la biblioteca en los binarios de Windows de PHP 5.2. Los binarios de PHP 5.3 para Windows utilizan la versión estática de la biblioteca Mcrypt, no se necesita de ningún DLL adicional.
Si lo enlaza con libmcrypt 2.4.x o superiores, las siguientes bloques de algoritmos adicionales serán soportados: CAST, LOKI97, RIJNDAEL, SAFERPLUS, SERPENT y los siguientes cifradores de flujo: ENIGMA (crypt), PANAMA, RC4 y WAKE. Con libmcrypt 2.4.x o superiores, otro modo de cifrado está también disponible: nOFB.
mcrypt is built in for PHP 5.3.x on windows, you don't need to do anything with a dll anymore.
Both mcrypt and libmcrypt are available through the linked website. You simply have to click the "Browse all files" or similar link once on the "development site" and not just look for the default Sourceforge download button.
there are no instructions included with the sourceforge download.
After php 5.3 mcrypt is automatically included and enabled.
(i was looking to enable an extension)
If installing libmcrypt from RPM, you need both libmcrypt*.rpm and libmcrypt-devel*.rpm. I found RPMs for both were available for most platforms on this page:
http://rpmforge.net/user/packages/libmcrypt/
Also files.edin.dk does not seem to carry the win32 files anymore.
On linux:
sudo apt-get install php5-mcrypt
sudo php5enmod mcrypt
sudo service apache2 restart