Frontend technologies like HTML, CSS, JavaScript
PHP web frameworks like Laravel, CodeIgniter, etc.
Web servers and database languages
Graphic design software
Content management system
Object-oriented PHP programming
Code versioning tools like CVS, SVN, Git, etc.
Familiarity with SQL/MySQL databases
MVC design patterns
Integration of databases and data sources into a unified system
Open-source projects like Drupal, Joomla, etc.
Integration with third-party APIs like Facebook, Google, etc.
Using XML, HTTP requests, JSON parsing, package installers like pecl, etc.
Data structure and algorithms
Email and messaging apps
Knowledge of AJAX, jQuery, MySQL
Writing T-SQL queries, stored procedures, triggers, functions, etc.
Scaling and tuning database applications, modeling, performance optimization, etc.