- Encapsulation is to ascertain that each part of an
application is seperate and doesn't interfere with any others.
- When defining a property in a class, you must specify
whether it's public, private, or protected.
- Public properties are available to all parts of a PHP
script, both inside and outside the class definition, and their
values can be changed in the same way as any variable.
- Protected and private properties are invisible from
external scripts, so they cannot be changed arbitrarily.
private function display()
echo " This is private Function";
class Test extends Encapsulation
echo "This is sub class";
Fatal error: Call to private method Encapsulation::display()