Troubleshooting PHP errors - veleek/kudu GitHub Wiki

If your PHP site is failing with some http 500 errors, try enabling logging. To do this:

• Use Kudu Console and go into D:\home\site\wwwroot
• In your .user.ini file, add the following line (you can type touch .user.ini to create the file if it doesn't exist, and don't forget the starting dot on the .user.ini file!):

log_errors = On

• Restart your site
• Make a few failing requests to get some logging going.
• Now, from Kudu Console, go to D:\home\LogFiles and open up (or download) php_errors.log.

At the end, you'll find the most recent entries, which may give clues as to what's going on.