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I'm creating a custom webform handler plugin based on the advice here, adding the class, in the correct directory, to an existing module.

I got the class name / some of the docblock info wrong initially - and need to change it. Having run drush cr, the listing on /admin/structure/webform/config/handlers seems to be stuck on the old entry.

I get "Cannot declare class ... because the name is already in use" errors when trying to add the handler to the form, for a class name that I'm no longer using, and which, having cleared the cache, definitely isn't in cache_discovery.webform_handler_plugins in the DB.

I've also swapped browsers.

What am I missing?

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    Have you tried restarting PHP or the server? This happens to me in local dev sometimes and rebooting the VM seems to work. – Kevin Jun 26 '18 at 19:36
  • @Kevin ah thanks - restarting the docker container (devwithlando/php:7.1-fpm) worked. – William Turrell Jun 26 '18 at 22:55
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Sometimes, especially with a local dev environment, after you have tried every other route the only other avenue is to restart the PHP service and/or reboot the server/VM. This should clear system caches and often times will resolve this issue.

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