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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 8.3

PHP 8.0

PHP 5.6

How to define a string variable in PHP?

String $var = "text";

str $var = "text";

$var = "text";

string $var = "text";

Which function converts string to uppercase?

strtoupper()

upperCase()

strtoUpper()

toUpperCase()

What does strlen() function return?

Number of words

Number of characters in string

Number of bytes

Number of lines

What types of arrays exist in PHP?

Mixed

Only associative

Indexed and Associative

Only indexed

How to properly connect to MySQL?

Via HTTP

Via SQL

mysqli or PDO

mysql (deprecated)

What is SQL Injection?

SQL error

Injection of malicious code via SQL queries

SQL organization

Low version of SQL

What is isset() function used for?

Delete variable

Check if variable is set

Set a variable

Restore variable

What is $_GET superglobal in PHP?

Data from GET method

Data from URL

Data from POST method

Data from file

What is a session in PHP?

HTTP connection

Temporary user data storage

Response to request

Permanent 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?

for

foreach

map

while

What is a function in PHP?

Variable

Reusable block of code

Class

Constant

How to declare a function in PHP?

func name() {}

function: name() {}

function name() {}

def name() {}

What is OOP in PHP?

Output-Optimized Program

Object-Oriented Programming

Operation-Organized Package

Open-Operated Program

What is a class in PHP?

Template for objects

Constant

Function

Variable

What is inheritance in OOP?

Unexpected transfer

Duplication

Introduction

Getting properties from parent class

What are access modifiers?

Part of SQL command

Variable type

Types of functions

Control access to properties

How to write else if in PHP?

else-if

elseif

else if

elif

What is a constructor in a class?

__init()

__create()

__new()

__construct()

What is namespace in PHP?

Function constructor

Data type

Local scope

Space for avoiding naming conflicts

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