Raphaël Gertz (Rapsys)
How to reliably detect transparency in PNG image with PHP
Reliable PHP function to detect PNG images with transparency supporting all the variants to process.
PNG
Cache a webservice responses by ignoring the Authorization header using Varnish.
Service web
Secure a webservice by granting access only to remote IP address included in a CIDR blocks set.
CIDR
Setup a single entry point for various web services including Apache and a few others available on exotic ports.