fredrikekelund fredrikekelund - 1 month ago 11
PHP Question

PHP lists files that don't exist

I'm running Grav CMS on a Linode Ubuntu 16.04 server where PHP7 (php-fpm + nginx) returns cached results when listing directory contents. I first encountered the problem with

, but it isn't limited to that class - the same problem appears when I use
scandir
.

Basically what happens is that any time I sync new content to the server, whether I use rsync or FTP, PHP will return the old contents of a particular folder.I've tried calling
clearstatcache
, but it didn't help – even if I called it from the appropriate PHP file, just before I scanned the directory.

touch
'ing the files to update their mtime doesn't help either. Restarting the php-fpm service does work, however.

Is it possible that PHP caches the contents of the directory in some other way? Could it be the file system that is fooling PHP somehow?

Answer

It turns out the problem I was having wasn't due to the OS or PHP, but to the Grav CMS itself – specifically how it caches page objects. It doesn't invalidate cached pages if all that had changed was the associated media files. Turning off the global cache setting for Grav helped this issue, but I've also opened an issue on the Grav repo to see if this is inteded behaviour or not.

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