My first commit,all the codes are from the textbook.

Changes to be committed:
	new file:   ClassProperty.php
	new file:   Fibonacci.php
	new file:   array_splice.php
	new file:   car_simulator.php
	new file:   clever_string.php
	new file:   common.css
	new file:   dir_list.php
	new file:   dir_list_oop.php
	new file:   directory_tree.php
	new file:   fibonacci_R.php
	new file:   get_fruit.php#
	new file:   get_set.php
	new file:   greetings.php
	new file:   hello.php
	new file:   hello_pretty.php
	new file:   hit_counter.php
	new file:   index.html
	new file:   inheritance.php
	new file:   interface.php
	new file:   justification.php
	new file:   letterdock.php
	new file:   login.php
	new file:   multidimensional.php
	new file:   number_squaring.php
	new file:   photo_upload.php
	new file:   process_registration.php
	new file:   process_registration_multi.php
	new file:   registration.html
	new file:   registration.php
	new file:   registration_multi.html
	new file:   registration_multistep.php
	new file:   remember_me.php
	new file:   shopping_cart.php
	new file:   testphp.php
	new file:   text_editor.php
	new file:   web_form.html