Please select
./lecture1/composition.php
./lecture1/factory.php
./lecture1/inheritance.php
./lecture1/interface.php
./lecture1/late_static_binding.php
./lecture1/traits.php
./lecture2/abstract_classes.php
./lecture2/aggregation_delegation.php
./lecture2/closures.php
./lecture2/dependency_injection.php
./lecture2/magic_methods.php
./lecture2/namespace_autoloading.php
./lecture2/polymorphism.php
./lecture2/singleton.php
please select example