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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
First Application

Let's begin with a classic programming example — "Hello World". This program serves as the first step for many in programming, demonstrating the basic principles of the language.

php

main

copy

              
123

            
<?php 
echo "Hello, World!";
?>

Code Syntax

Let's break down the syntax of this program in detail:

  1. <?php and ?>: These indicate the start and end of PHP code. All PHP instructions must be placed between these tags. This defines that the text within these tags will be interpreted as PHP code;

  2. echo: This is a PHP language construct used to output data. In our case, we use echo to display the string "Hello, World!";

  3. "Hello, World!": This is the text we are echoing with echo. In PHP, strings can be specified in either single or double quotes. It's important that the closing quote matches the opening one;

  4. The semicolon (;) is used to terminate statements. This is necessary so that the PHP interpreter knows where one command ends and the next begins. Without the semicolon, PHP wouldn't be able to correctly parse the code, leading to syntax errors.

Task
test

Swipe to show code editor

Your challenge is to output "Hello, Codefinity!" in the console.

Once you've completed this task, click the button below the code to check your solution.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 1. Chapter 2
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book
First Application

Let's begin with a classic programming example — "Hello World". This program serves as the first step for many in programming, demonstrating the basic principles of the language.

php

main

copy

              
123

            
<?php 
echo "Hello, World!";
?>

Code Syntax

Let's break down the syntax of this program in detail:

  1. <?php and ?>: These indicate the start and end of PHP code. All PHP instructions must be placed between these tags. This defines that the text within these tags will be interpreted as PHP code;

  2. echo: This is a PHP language construct used to output data. In our case, we use echo to display the string "Hello, World!";

  3. "Hello, World!": This is the text we are echoing with echo. In PHP, strings can be specified in either single or double quotes. It's important that the closing quote matches the opening one;

  4. The semicolon (;) is used to terminate statements. This is necessary so that the PHP interpreter knows where one command ends and the next begins. Without the semicolon, PHP wouldn't be able to correctly parse the code, leading to syntax errors.

Task
test

Swipe to show code editor

Your challenge is to output "Hello, Codefinity!" in the console.

Once you've completed this task, click the button below the code to check your solution.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 1. Chapter 2
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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