as root
Now edit php.ini, use find / -iname php.ini to search it and add.
apt-get install libpango1.0-dev libxml2-dev wget http://oss.oetiker.ch/rrdtool/pub/rrdtool-1.4.7.tar.gz tar -zxvf rrdtool-1.4.7.tar.gz cd rrdtool-1.4.7 mkdir /tmp/rrdbuild export BUILD_DIR=/tmp/rrdbuild mkdir /opt/rrdtool-1.4.7 export INSTALL_DIR=/opt/rrdtool-1.4.7 ./configure -prefix=$INSTALL_DIR make make install mkdir -p /usr/local/src/php-5.3.10/ext cd /usr/local/src/php-5.3.10/ext wget http://oss.oetiker.ch/rrdtool/pub/contrib/php_rrdtool.tar.gz tar -zxvf php_rrdtool.tar.gz cd rrdtool ./configure -with-rrdtool=/opt/rrdtool-1.4.7 -with-php-config=/usr/bin/php-config make make install
extensions=rrdtool.so