PHP abstraction

PHP abstraction

References

Reference NO 1

http://php.net/manual/en/language.oop5.abstract.php

Reference NO 2

http://stackoverflow.com/questions/1913098/what-is-the-difference-between-an-interface-and-abstract-class

Reference NO 3

http://stackoverflow.com/questions/7939199/abstract-private-functions

Reference NO 4

http://aleembawany.com/2010/04/03/understanding-abstract-classes-in-php/

Reference NO 5

http://www.primitivetype.com/articles/php_5_abstract_classes_and_methods.php

Reference NO 6

http://www.techflirt.com/tutorials/oop-in-php/abstract-classes-interface.html

Reference NO 7

http://www.sunilb.com/php/php5-tutorials-abstract-class-and-interface

Reference NO 8

http://pdepend.org/documentation/handbook/reports/abstraction-instability-chart.html