When installing phpMyAdmin, one of the PHP extension require is mcrypt. Here is how to manually build it.
First you need libmcrypt header to build it. So, we download the libmcrypt from here. Extract the file to a folder
./configure --disable-posix-threads --enable-static make sudo make install
After that, download PHP source code.
cd ~/Downloads/php-5.3.0/ext/mcrypt phpize ./configure make cd modules sudo cp mcrypt.so /usr/lib/php/extensions/no-debug-non-zts-20090626/