This HOWTO is based on SL5, RHEL5, CentOS 5. (rrdtool-1.2.23-1.el5.rf.x86_64, rrdtool-1.2.23-1.el5.rf.i386) STEP 1 : Go to http://oss.oetiker.ch/rrdtool/pub/contrib/ to get the PHP rrdtool source : php_rrdtool.tar.gz STEP 2 : Extract the php_rrdtool.tar.gz file into php extensions directory(/usr/include/php/ext/). Please use the following commands : # tar zxvf php_rrdtool.tar.gz # mv rrdtool /usr/include/php/ext/ … Continue reading HOWTO build the PHP rrdtool extension?