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Quiz: Basic PHP questions

Core PHP ideas and use in web development.

Which version of PHP is most stable?

PHP 7.4

PHP 8.0

PHP 5.6

PHP 8.3

How to define a string variable in PHP?

str $var = "text";

string $var = "text";

$var = "text";

String $var = "text";

Which function converts string to uppercase?

strtoupper()

toUpperCase()

upperCase()

strtoUpper()

What does strlen() function return?

Number of characters in string

Number of lines

Number of bytes

Number of words

What types of arrays exist in PHP?

Only associative

Mixed

Only indexed

Indexed and Associative

How to properly connect to MySQL?

Via SQL

Via HTTP

mysql (deprecated)

mysqli or PDO

What is SQL Injection?

SQL error

SQL organization

Low version of SQL

Injection of malicious code via SQL queries

What is isset() function used for?

Check if variable is set

Set a variable

Restore variable

Delete variable

What is $_GET superglobal in PHP?

Data from POST method

Data from file

Data from GET method

Data from URL

What is a session in PHP?

Permanent storage

HTTP connection

Response to request

Temporary user data storage

What is the difference between isset() and empty()?

isset() checks existence, empty() checks value

empty() checks existence

They are the same

No difference

How to iterate through array in PHP?

for

foreach

while

map

What is a function in PHP?

Class

Reusable block of code

Variable

Constant

How to declare a function in PHP?

def name() {}

func name() {}

function name() {}

function: name() {}

What is OOP in PHP?

Output-Optimized Program

Object-Oriented Programming

Open-Operated Program

Operation-Organized Package

What is a class in PHP?

Function

Template for objects

Constant

Variable

What is inheritance in OOP?

Introduction

Getting properties from parent class

Duplication

Unexpected transfer

What are access modifiers?

Variable type

Types of functions

Control access to properties

Part of SQL command

How to write else if in PHP?

else-if

elif

elseif

else if

What is a constructor in a class?

__construct()

__new()

__create()

__init()

What is namespace in PHP?

Space for avoiding naming conflicts

Local scope

Data type

Function constructor

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