PHP Quiz

Answer 10 questions and see how you score!

Enter Your Name

1. Which function formats a number with grouped thousands?

number_format()

format_number()

num_format()

number_group()

2. What does empty("0") return?

True

False

Error

NULL

3. Which function is used to free memory allocated to variables?

unset()

free()

destroy()

release()

4. Which function converts a string to binary-safe format?

pack()

bin2hex()

hex2bin()

serialize()

5. Which function retrieves information about the current script?

$_SERVER

getenv()

phpinfo()

script_info()

6. Which PHP function registers a function to be executed on script shutdown?

register_shutdown_function()

shutdown()

on_exit()

exit_function()

7. Which keyword is used to inherit a class in PHP?

extends

implements

inherits

uses

8. Which function removes a variable?

unset()

delete()

remove()

clear()

9. What will echo (bool)"0"; output?

False

True

Error

10. Which operator is used for spaceship comparison?

<=>

==>