Generating one voucher code is easy, but what if you need to generate thousands (or millions) and you need to be sure that each voucher code is unique? In this post, I will explain how you can solve this problem (in PHP).
PHP
Laravel Deadlocks: Queue Jobs That Already Ran End Up in failed_jobs
Below MySQL 8.0.1, or on a server Laravel misreads, workers reserve jobs with a plain FOR UPDATE and can deadlock on the DELETE. One tinker line shows which lock yours use. Read more