PHP Server-Side Programming: Interactive Learning Quizzes

Question 1

What is the purpose of the `echo` statement in PHP?

Accepted Answer

To print data to the user

Answer

To assign a value to a variable

Answer

To compare two values

Answer

To loop through an array

Question 2

Which control structure is used to execute a block of code only if a certain condition is met?

Accepted Answer

if-else

Answer

for

Answer

while

Answer

switch

Question 3

What is the syntax for declaring a function in PHP?

Accepted Answer

`function functionName(parameters): returnType { ... }`

Answer

`func functionName(parameters): returnType { ... }`

Answer

`declare function functionName(parameters): returnType { ... }`

Answer

`create function functionName(parameters): returnType { ... }`

Question 4

What is the purpose of the `foreach` loop in PHP?

Accepted Answer

To loop through an array and execute code on each element

Answer

To loop through a string and execute code on each character

Answer

To loop through a set of numbers and execute code on each number

Answer

To loop through a file and execute code on each line

Question 5

Which of the following is a valid PHP string interpolation syntax?

Accepted Answer

`echo "Hello, {$name}";`

Answer

`echo "Hello, {name}";`

Answer

`echo "Hello, $name";`

Answer

`echo "Hello, $name";`

Question 6

What is the difference between `include` and `require` statements in PHP?

Accepted Answer

`require` generates an error if the file is not found, while `include` does not

Answer

`include` generates an error if the file is not found, while `require` does not

Answer

`include` and `require` both generate errors if the file is not found

Answer

`include` and `require` are interchangeable

Question 7

Which of the following is NOT a basic data type in PHP?

Accepted Answer

Array

Answer

Integer

Answer

Float

Answer

Boolean

Question 8

Which syntax is used to declare and assign a value to a variable in PHP?

Accepted Answer

$variable = value

Answer

var $variable = value

Answer

var variable = value

Answer

$variable value

Question 9

Which PHP control structure is used to execute a set of statements repeatedly while a specific condition remains true?

Accepted Answer

while

Answer

if

Answer

do-while

Answer

for

Question 10

Identify the primary purpose of the $_SERVER variable in PHP.

Accepted Answer

Stores all of the above information

Answer

Stores user browser information

Answer

Stores server environment details

Answer

Stores request-related data

Question 11

Which is the preferred practice for naming PHP variables?

Accepted Answer

Descriptive and self-explanatory names

Answer

Short and ambiguous names

Answer

Capitalized names

Answer

Lowercase names

Question 12

Determine the output of the PHP code: echo round(3.14159, 2);

Accepted Answer

3.14

Answer

3

Answer

3.1

Answer

3.141590

Question 13

Which PHP function is used to convert a string to uppercase characters?

Accepted Answer

strtoupper()

Answer

toUpper()

Answer

uppercase()

Answer

toUpperCase()

Question 14

Which of the following is not a commonly used PHP framework?

Accepted Answer

Express.js

Answer

Laravel

Answer

Symfony

Answer

Zend Framework

Question 15

In PHP, which data type represents text data?

Accepted Answer

String

Answer

Integer

Answer

Float

Answer

Boolean

Question 16

The purpose of the $_GET variable in PHP is to:

Accepted Answer

Access data from forms submitted using the GET method

Answer

Access data from forms submitted using the POST method

Answer

Store session information

Answer

Generate random numbers

Question 17

The header() function in PHP is used to:

Accepted Answer

Send HTTP headers to the client

Answer

Access request headers

Answer

Redirect the user to another page

Answer

Parse HTTP request data

Question 18

Which PHP variable contains information about the current user session?

Accepted Answer

$_SESSION

Answer

$_SERVER

Answer

$_GET

Answer

$_POST

Question 19

The difference between 'require' and 'include' statements in PHP is that:

Accepted Answer

'require' generates an error if the included file is missing, while 'include' does not

Answer

'include' generates an error if the included file is missing, while 'require' does not

Answer

There is no difference between 'require' and 'include'

Answer

'require' loads the included file only once, while 'include' loads it every time

Question 20

The primary purpose of the 'mysqli' extension in PHP is to:

Accepted Answer

Connect to and interact with MySQL databases

Answer

Parse JSON data

Answer

Generate random numbers

Answer

Handle XML data

Question 21

In PHP, what is the main purpose of the 'switch-case' statement?

Accepted Answer

To execute specific code based on the value of a variable.

Answer

To loop through an array.

Answer

To create a reusable function.

Question 22

Outline the necessary steps for handling and processing form data from an HTML form using PHP.

Accepted Answer

Employ the $_POST superglobal to access form data submitted via the POST method.

Answer

Secure the user's identity through authentication before accessing the form data.

Answer

Utilize the $_GET superglobal to retrieve form data.

Answer

Manually parse the form data using regular expressions.

Question 23

What is a primary use case for an array in a PHP script?

Accepted Answer

Storing and organizing a collection of data, accessible via numeric or associative indices.

Answer

Defining a set of constants that can be referenced throughout the script.

Answer

Establishing a database connection and executing SQL queries.

Question 24

In PHP, what's the main difference between a variable and a constant?

Accepted Answer

Variables can change, but constants stay the same.

Answer

Constants use 'constant', while variables use 'variable'.

Answer

Constants don't care about capitalization, but variables do.

Answer

Variables are always for everyone, while constants are just for one place.

Question 25

In PHP, how do you define a variable?

Accepted Answer

$variable_name;

Answer

var $variable_name;

Answer

variable_name $;

Answer

($variable_name);

Question 26

In PHP, what is the data type for a string?

Accepted Answer

String

Answer

Integer

Answer

Boolean

Answer

Array

Question 27

In PHP, which control structure checks if a condition is true and executes a block of code if so?

Accepted Answer

if

Answer

for

Answer

while

Answer

switch

Question 28

What is the function of the `echo` statement in PHP?

Accepted Answer

To display data on the screen

Answer

To define a variable

Answer

To terminate a script

Answer

To store user input

Question 29

What is the default value of a variable that has not been assigned a value in PHP?

Accepted Answer

null

Answer

0

Answer

false

Answer

undefined

Question 30

Which function in PHP allows you to establish a connection to a database?

Accepted Answer

mysqli_connect()

Answer

connect()

Answer

db_connect()

Answer

mysql_connect()

Question 31

What is the main purpose of a session in PHP?

Accepted Answer

To maintain user information across multiple pages

Answer

To protect user data

Answer

To generate random numbers

Answer

To manage file uploads

Question 32

What is the purpose of the `require_once` statement in PHP?

Accepted Answer

To include a file only if it has not been included before

Answer

To define a custom function

Answer

To create a new class

Answer

To handle errors

Question 33

Which code snippet accurately illustrates the distinction between global and local variables in PHP?

Accepted Answer

(global) $x = 5; function test() {global $x; $y = 10; echo $x + $y;}; test();

Answer

function test() {$x = 10; echo $x;} test(); echo $x;

Answer

$x = 5; function test() {$x = 10;}; test(); echo $x;

Question 34

What is the primary purpose of the include() function in PHP?

Accepted Answer

To include the contents of another PHP file into the current one

Answer

To load a library

Answer

To output data to the web browser

Answer

To create a new PHP file

Question 35

What will be the output of the following PHP code? echo strtoupper('hello world');

Accepted Answer

HELLO WORLD

Answer

hello world

Answer

Hello World

Answer

hELLO wORLD

Question 36

What is the main purpose of the $_SERVER superglobal in PHP?

Accepted Answer

To provide information about the web server and the current request

Answer

To store user input

Answer

To store session data

Question 37

What is the primary purpose of the header() function in PHP?

Accepted Answer

To send a header to the web browser

Answer

To redirect the user to another page

Answer

To start a session

Answer

To set a cookie

Question 38

Which of the following methods is used to establish a connection to a MySQL database using PHP?

Accepted Answer

mysqli_connect()

Answer

mysql_connect()

Answer

connect_mysql()

Answer

db_connect()

Question 39

What will be the output of the following PHP code? echo date('Y-m-d H:i:s');

Accepted Answer

Current date and time in the format YYYY-MM-DD HH:MM:SS

Answer

Current time in the format HH:MM:SS

Answer

Current date in the format YYYY-MM-DD

Question 40

Which of these is **NOT** a valid logical operator in PHP's conditional statements?

Accepted Answer

~ (Bitwise NOT)

Answer

&& (AND)

Answer

|| (OR)

Answer

! (NOT)

Question 41

In PHP, how do you declare a constant variable?

Accepted Answer

const $variable

Answer

$variable const

Answer

var const $variable

Answer

const var $variable

Question 42

Which control structure in PHP is used to execute a block of code repeatedly while a specified condition remains true?

Accepted Answer

while

Answer

switch

Answer

for

Answer

if

Question 43

What is the purpose of the `$_SERVER` variable in PHP?

Accepted Answer

To store information related to the web server.

Answer

To manage user input.

Answer

To handle file uploads.

Answer

To establish database connections.

Question 44

Which PHP method is used to send HTTP headers?

Accepted Answer

header()

Answer

write()

Answer

print()

Answer

echo()

Question 45

Which PHP function is commonly used to establish a database connection?

Accepted Answer

mysqli_connect()

Answer

db_connect()

Answer

mysql_connect()

Answer

connect()

Question 46

Which PHP variable scope permits access to a variable throughout the entire script?

Accepted Answer

$GLOBALS

Answer

$PRIVATE

Answer

$LOCAL

Answer

$CONSTANT

Question 47

Which PHP data type stores numbers with decimal points?

Accepted Answer

float

Answer

integer

Answer

string

Answer

boolean

Question 48

Which PHP control structure executes a block of code only when a specified condition is met?

Accepted Answer

if

Answer

while

Answer

switch

Answer

for

Question 49

What is the proper syntax for creating an associative array in PHP?

Accepted Answer

$array = ['key' => 'value', ...]

Answer

$array = (key => value, ...)

Answer

$array = {key: value, ...}

Answer

$array = [key => value, ...]

Question 50

Which PHP function establishes a connection to a MySQL database?

Accepted Answer

mysqli_connect()

Answer

db_connect()

Answer

pdo_connect()

Answer

mysql_connect()

Question 51

What is the primary purpose of the $_SERVER superglobal variable in PHP?

Accepted Answer

Providing information about the server and request environment.

Answer

Storing session data.

Answer

Handling file uploads.

Question 52

Which PHP function converts data into JSON format?

Accepted Answer

json_encode()

Answer

unserialize()

Answer

serialize()

Answer

json_decode()

Question 53

What is the purpose of the header() function in PHP?

Accepted Answer

Sending HTTP headers to the client.

Answer

Parsing incoming HTTP requests.

Answer

Setting cookie values.

Answer

Redirecting the user to a new page.

Question 54

Which PHP function retrieves the current date and time?

Accepted Answer

date()

Answer

now()

Answer

time()

Answer

datetime()

Question 55

What is the key distinction between the require() and require_once() functions in PHP?

Accepted Answer

require_once() includes a file only once, while require() includes it every time it is encountered in the script.

Answer

require_once() includes a file from the server-side, while require() includes it from the client-side.

Answer

require() includes a file only if it has not been included before, while require_once() includes it every time.