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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 8.3

PHP 5.6

How to define a string variable in PHP?

string $var = "text";

String $var = "text";

str $var = "text";

$var = "text";

Which function converts string to uppercase?

strtoUpper()

strtoupper()

upperCase()

toUpperCase()

What does strlen() function return?

Number of bytes

Number of characters in string

Number of words

Number of lines

What types of arrays exist in PHP?

Only indexed

Indexed and Associative

Mixed

Only associative

How to properly connect to MySQL?

mysql (deprecated)

Via HTTP

mysqli or PDO

Via SQL

What is SQL Injection?

SQL organization

Injection of malicious code via SQL queries

SQL error

Low version of SQL

What is isset() function used for?

Restore variable

Set a variable

Check if variable is set

Delete variable

What is $_GET superglobal in PHP?

Data from URL

Data from POST method

Data from GET method

Data from file

What is a session in PHP?

Response to request

HTTP connection

Permanent storage

Temporary user data storage

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

isset() checks existence, empty() checks value

They are the same

No difference

empty() checks existence

How to iterate through array in PHP?

map

while

for

foreach

What is a function in PHP?

Constant

Variable

Reusable block of code

Class

How to declare a function in PHP?

def name() {}

function: name() {}

func name() {}

function name() {}

What is OOP in PHP?

Operation-Organized Package

Open-Operated Program

Object-Oriented Programming

Output-Optimized Program

What is a class in PHP?

Function

Template for objects

Variable

Constant

What is inheritance in OOP?

Unexpected transfer

Introduction

Duplication

Getting properties from parent class

What are access modifiers?

Control access to properties

Types of functions

Part of SQL command

Variable type

How to write else if in PHP?

elseif

elif

else-if

else if

What is a constructor in a class?

__construct()

__create()

__init()

__new()

What is namespace in PHP?

Space for avoiding naming conflicts

Function constructor

Data type

Local scope

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