Strong knowledge of PHP web frameworks , Understanding the fully synchronous behavior of PHP , Understanding of MVC design patterns, Basic understanding of front-end technologies, such as JavaScript, HTML5, and CSS3 Knowledge of object oriented PHP programming Understanding accessibility and security compliance ,Strong knowledge of the common PHP or web server exploits and their solutions Understanding fundamental design principles behind a scalable application User authentication and authorization between multiple systems, servers, and environments Integration of multiple data sources and databases into one system Familiarity with limitations of PHP as a platform and its workarounds