Bref is a serverless framework allowing you to use AWS Lambda with PHP sites, including Symfony apps.
In the serverless.yml file, include the following to allow the headers from the API Gateway to be picked up (eg. so Symfony knows you’re using https rather than http … and makes your absolute URLs with https accordingly);
provider:
environment:
TRUSTED_PROXIES: 127.0.0.1,127.0.0.2
Ref; https://symfony.com/doc/current/deployment/proxies.html
As part of this, some optimisations need to be made to the php.ini file, to get Symfony running a little faster;
; maximum memory that OPcache can use to store compiled PHP files
opcache.memory_consumption=256
; maximum number of files that can be stored in the cache
opcache.max_accelerated_files=20000
; don't check timestamps for php files in cache (comment out if php files are getting edited on the server)
; needs a clear-cache script prepared
opcache.validate_timestamps=0
; maximum memory allocated to store the results
realpath_cache_size=4096K
; save the results for 10 minutes (600 seconds)
realpath_cache_ttl=600