1. Bergmann, S., Kniesel, G.: GAP: generic aspects for PHP. In: Proceedings of EWAS’06 (2006)
2. Bakken, S.S., Aublach, A., Schmid, E., et al.: PHP manual (The PHP Documentation Group). https://php.net/manual/en/index.php, Accessed 10 March 2014
3. Nakajima, S., Hokamura, K., Ubayashi, N.: Aspect-oriented development of PHP-based web applications, 34th annual IEEE computer software and applications conference workshops (2010)
4. Veglis, A., Leclercq, M., Quema, V.: PHP and SQL made simple distributed systems online, Volume 6 Issue 8, August 2005, Page 4
5. http://webcoderpro.com/blog/top-6-most-popular-php-frameworks-of-2013/
. Accessed 21 Jan 2014