PHP Quiz

Answer 10 questions and see how you score!

Enter Your Name

1. Which function determines if garbage collection is enabled?

gc_enabled()

gc_status()

gc_active()

gc_check()

2. Which function converts an array to a string?

implode()

explode()

join_array()

array_string()

3. Which function returns memory usage of the script?

memory_get_usage()

get_memory()

memory_usage()

usage_memory()

4. What will count(null) return?

Error

NULL

5. What does strict_types=1 enforce?

Type declarations are strictly enforced

Variables must be typed

Functions cannot return null

Errors are suppressed

6. Which function encodes data to JSON?

json_encode()

json_decode()

encode_json()

to_json()

7. What is the output of: echo empty([]);

True

False

NULL

Error

8. Which function retrieves all declared classes?

get_declared_classes()

get_classes()

declared_classes()

list_classes()

9. How do you start a session in PHP?

session_start()

start_session()

begin_session()

session()

10. Which function checks if a variable is empty?

empty()

isset()

check()

var_empty()