Exploding and Imploding Exercise 1

Create the $famous_fake_physicists string that lists the physicists and
contains the "and" at the end.
Reading Files

Add a file menu option to the main menu in your TODO list app. In this
file menu create a (O)pen file option. The user should be able to enter
the path to a file to have it loaded.

Create a function that reads the file, and adds each line to the
current TODO list. Loading data/todo_list.txt should properly load the
list from above. Be sure to fclose() the file when you are done reading
it.
Searching in Arrays Exercise 2

Create a function that returns TRUE or FALSE if an array value is
found. Search for Tina and Bob in $names. Make sure it works as
expected.
Searching in Arrays Exercise 3

Create a function to compare 2 arrays that returns the number of values
in common between the arrays. Use the 2 example arrays and make sure
your solution uses array_search().