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Working with PHP started as early as 2006 with the LAMP stack, since then PHP has come a long way and my knowledge of it did so too, to date I've worked with more than 12 PHP frameworks and CMSs on various projects that varied in size, some of those frameworks are sadly not alive today.
Worked on and created projects using Laravel, Symfony 1 through 4, CakePHP, CodeIgniter, FFF (Fat Free Framework), Yii and Zend also coded components and extensions for CMSs like WordPress, Joomla, Magento and Drupal.
JavaScript was used mainly for MEAN stack where JavaScript is used for both backend and frontend, for backend NodeJs frameworks were used to develop RESTful APIs while frontend used to combine UI views and services to fetch data from the APIs and POST RPCs to the backend according to underlying business logic.
Frameworks like Express for backend, AngularJs, later Angular versions starting at 2 using TypeScipt and KnockOut for frontend with libraries like Bootstrap and JQuery for UI.
Multiple database systems were used corresponding to stack and use-case including SQL, NoSQL and in-momory key-value pair storages.
MySql mainly for relational data, while MongoDB for unstructured data like logs and stacktraces and both Redis and Memcached for inmemory caching and queuing systems.