Why has PHP Module Penetration on Apache been falling for the past 5 years? -

PHP's entry on the Apache server is falling from the beginning of 2005, my question is why

PHP Very well, people are using Ruby or other languages ​​.....

< P> and professional hosts are migrating to phstcgi and suxac on PHP and this is not counted in the graph (which is probably about mod_php login, not PHP). This quasaras or project will not count the Xiros PHP runtime, nor the hip hop.