3.14     Exercises

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1. Which of the following are not valid variables:

   • a) $blah

   • b) $f11

   • c) $_11f

   • d) $11f

   • e) None of the above

2. What will $foo be set to in this expression: $foo = "wombat" * 2?

3. What will $bar be set to in this expression: $bar = 5 * 5 + 5?

4. What does the =< operator do?

5. How does OR different from || ?

6. The superglobal array variables are accessible...

   • a) Only outside functions

   • b) Only inside functions

   • c) Anywhere except in classes

   • d) Anywhere, as long as they are defined GLOBAL

   • e) None of the above