This has happened to me twice with the same host and I want to know the real cause.
I have multiple wordpress sites hosted on a shared server. One day when I attempt to visit any of the sites, the webpage simply downloads the index.php file. It happens on all wordpress sites but not on static sites hosted there.
I understand this is a php issue on the server, but what could be happening specifically? the only thing I could find when searching is something to do with memory limits. Is this common? Should I be worried about this host?