Hello, This tutorial is the next of “[A simple Data Layer for OOP PHP Applications](https://www.daniweb.com/programming/web-development/tutorials/500118/a-simple-data-layer-for-oop-php-applications)” so having read it and made your own tests is needed to understanding what we are doing. So far we have a Db object (child of PDO that standardize and simplifies its use) , a Db factory object (because our web app may need more than one DB object) and Data Workers (for working with data from DB) (there are in the tutorial mentioned above) . We are going to do it in such way that can be implemented without the use of any framework …

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A simple Data Layer for OOP PHP Applications Hello, first of all to understand this tutorial would be best if you have some knowledges about OOP ( https://www.daniweb.com/programming/web-development/tutorials/437592/introduction-to-phps-object-orientation by priteas ) and DB usage (MySQL in this case) with PHP https://www.daniweb.com/programming/web-development/threads/499320/common-issues-with-mysql-and-php by diafol ). What we will try to achieve is a consistent usage of the DB (we will use MySQL but you can use what ever DB you like). We will not map query results in objects / lists of objects in this tutorial (there will be another one that will contain that) , but just retrieve the results …

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The End.