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Introduction to PHP
course content

Course Content

Introduction to PHP

Introduction to PHP

1. First Acquaintance
Features of the PHP LanguageFirst ApplicationComments in PHPBasic Math OperationsMath Expressions
2. Variables and Data Types
Data Types VariablesStrings BooleanComparison Operations
3. Conditional Statements
If StatementElse StatementElse If StatementSwitch-Case Statement
4. Arrays
Creating ArraysIndexesAssociative ArraysAdding and Removing Elements in Arrays
5. Loops
Loops СonceptWhile-LoopsDo-WhileFor-LoopsIncrement and Decrement

book
Boolean

The boolean data type (bool) is used to represent logical values. A boolean variable can only have two possible values: true or false. Booleans are fundamental for decision-making and conditional operations within PHP programs.

php

main

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<?php
$isActive = true;
$isLogged = false;
?>

Outputting Boolean Values

You can output boolean values (true or false) using the echo function. When you use echo with true, PHP automatically outputs "1", as true converts to this string:

php

main

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<?php
$isLoggedIn = true;
echo $isLoggedIn; // Outputs "1"
?>

When you use echo with false, nothing is output, as false converts to an empty string:

php

main

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1234

            
<?php
$isLoggedIn = false;
echo $isLoggedIn; // Does not output anything
?>

This approach allows for convenient output of boolean values without manually converting them to strings.

Choose the Correct Statements about bool in PHP

Choose the Correct Statements about bool in PHP

Select a few correct answers

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Section 2. Chapter 4
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