mkdir /opt/phpfcgi-5.4.12
mkdir /usr/local/src/php5-build
cd /usr/local/src/php5-build
wget http://de.php.net/get/php-5.4.12.tar.bz2/from/this/mirror -O php-5.4.12.tar.bz2
tar jxf php-5.4.12.tar.bz2

apt-get install build-essential
apt-get build-dep php5
apt-get install libfcgi-dev libfcgi0ldbl libjpeg62-dbg libmcrypt-dev libssl-dev libc-client2007e libc-client2007e-dev
ln -s /usr/lib/libc-client.a /usr/lib/x86_64-linux-gnu/libc-client.a

./configure \
–prefix=/opt/phpfcgi-5.4.12 \
–with-pdo-pgsql \
–with-zlib-dir \
–with-freetype-dir \
–enable-mbstring \
–with-libxml-dir=/usr \
–enable-soap \
–enable-calendar \
–with-curl \
–with-mcrypt \
–with-zlib \
–with-gd \
–with-pgsql \
–disable-rpath \
–enable-inline-optimization \
–with-bz2 \
–with-zlib \
–enable-sockets \
–enable-sysvsem \
–enable-sysvshm \
–enable-pcntl \
–enable-mbregex \
–with-mhash \
–enable-zip \
–with-pcre-regex \
–with-mysql \
–with-pdo-mysql \
–with-mysqli \
–with-jpeg-dir=/usr \
–with-png-dir=/usr \
–enable-gd-native-ttf \
–with-openssl \
–with-fpm-user=www-data \
–with-fpm-group=www-data \
–with-libdir=/lib/x86_64-linux-gnu \
–enable-ftp \
–with-imap \
–with-imap-ssl \
–with-kerberos \
–with-gettext \
–enable-cgi

make
make install

php.ini: cp -v /usr/local/src/php5-build/php-5.4.12/php.ini-production /opt/phpfcgi-5.4.12/lib/php.ini

cd /tmp
wget http://www.ispconfig.org/downloads/ISPConfig-3-stable.tar.gz
tar xvfz ISPConfig-3-stable.tar.gz
cd ispconfig3_install/install

/opt/php-5.3.22/bin/php -q install.php