PHP MCQ-String Functions,Working with Files,Sessions and Cookies

1. What does the strlen() function return?

a) Number of words in a string
b) Length of the string (number of characters)
c) Index of a character
d) String in lowercase

2. What is the output of str_replace("world", "PHP", "Hello world")?

a) Hello world
b) Hello PHP
c) PHP world
d) Error

3. What does the explode() function do?

a) Combines strings
b) Converts string to array
c) Breaks string into characters
d) Deletes part of a string

4. Which function is used to convert all characters in a string to lowercase?

a) tolowercase()
b) to_lower()
c) strtolower()
d) lower()

5. What does the fopen() function do?

a) Close a file
b) Read a file line
c) Open a file
d) Create a new directory

6. Which mode opens a file for writing only and erases the content if it exists?

a) w
b) r
c) a
d) rw

7. What does fwrite() do in PHP?

a) Reads file content
b) Deletes file
c) Writes data to a file
d) Creates a file

8. What is the main purpose of PHP sessions?

a) Store data temporarily in the browser
b) Pass data between pages on server side
c) Create dynamic URLs
d) Store files on disk

9. Which function starts a session in PHP?

a) begin_session()
b) session_create()
c) session_start()
d) start_session()

10. How do you set a cookie in PHP?

a) store_cookie()
b) setcookie()
c) create_cookie()
d) cookie_save()

Wait for 20 seconds...