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Quiz: Basic PHP questions

Core PHP ideas and use in web development.

Which version of PHP is most stable?

PHP 5.6

PHP 7.4

PHP 8.0

PHP 8.3

How to define a string variable in PHP?

String $var = "text";

$var = "text";

str $var = "text";

string $var = "text";

Which function converts string to uppercase?

toUpperCase()

strtoUpper()

upperCase()

strtoupper()

What does strlen() function return?

Number of lines

Number of bytes

Number of characters in string

Number of words

What types of arrays exist in PHP?

Only associative

Indexed and Associative

Mixed

Only indexed

How to properly connect to MySQL?

mysqli or PDO

mysql (deprecated)

Via SQL

Via HTTP

What is SQL Injection?

SQL error

Injection of malicious code via SQL queries

Low version of SQL

SQL organization

What is isset() function used for?

Set a variable

Delete variable

Restore variable

Check if variable is set

What is $_GET superglobal in PHP?

Data from GET method

Data from file

Data from POST method

Data from URL

What is a session in PHP?

HTTP connection

Permanent storage

Response to request

Temporary user data storage

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

No difference

isset() checks existence, empty() checks value

They are the same

empty() checks existence

How to iterate through array in PHP?

while

map

foreach

for

What is a function in PHP?

Reusable block of code

Constant

Variable

Class

How to declare a function in PHP?

def name() {}

func name() {}

function name() {}

function: name() {}

What is OOP in PHP?

Output-Optimized Program

Open-Operated Program

Operation-Organized Package

Object-Oriented Programming

What is a class in PHP?

Constant

Function

Variable

Template for objects

What is inheritance in OOP?

Duplication

Unexpected transfer

Getting properties from parent class

Introduction

What are access modifiers?

Variable type

Part of SQL command

Types of functions

Control access to properties

How to write else if in PHP?

else if

elif

elseif

else-if

What is a constructor in a class?

__new()

__init()

__construct()

__create()

What is namespace in PHP?

Function constructor

Space for avoiding naming conflicts

Local scope

Data type

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