Course Content

Introduction to PHP

1. First Acquaintance

Features of the PHP Language First Application Comments in PHP Basic Math Operations Math Expressions

2. Variables and Data Types

Data Types Variables Strings Boolean Comparison Operations

3. Conditional Statements

If Statement Else Statement Else If Statement Switch-Case Statement

4. Arrays

Creating Arrays Indexes Associative Arrays Adding and Removing Elements in Arrays

5. Loops

Loops Сoncept While-Loops Do-While For-Loops Increment and Decrement

Strings

Strings are used to represent textual information and can be defined within single ' ' or double " " quotes.

main


              1234
            
<?php
$name = "John";
$message = 'Hello, World!';
?>

Strings can contain any characters, including letters, digits, and special symbols.

String Concatenation

Concatenation in PHP is used to join strings together into one string. The concatenation operator . (dot) is used for this purpose:

main


              1234567
            
<?php
$firstName = "John";
$lastName = "Doe";

$fullName = $firstName . " " . $lastName;  // `$fullName` will be `"John Doe"`
echo $fullName;
?>

The code above defines two variables, $firstName and $lastName, with values "John" and "Doe" respectively. It concatenates them into $fullName using the dot operator and then outputs the full name "John Doe" using echo.

Using Single and Double Quotes

You can use both '(single) and "(double quotes) to define strings. They have some differences in how they handle variables and special characters.

Double quotes allow variables to be directly used within the string and support escaping special characters:

main


              123456
            
<?php
$name = "John";
$message = "Hello, $name!";

echo $message;
?>

Single quotes treat everything inside them as literal text, ignoring variables and special characters:

main


              123456
            
<?php
$name = "John";
$message = 'Hello, $name!';

echo $message;
?>

Task

Swipe to show code editor

Assign any name to the variable $name.
Concatenate the strings using the . operator so that running the code outputs the greeting "Hello, SomeName!".

Switch to desktop for real-world practiceContinue from where you are using one of the options below

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Thanks for your feedback!

Section 2. Chapter 3

Strings

Strings are used to represent textual information and can be defined within single ' ' or double " " quotes.

main


              1234
            
<?php
$name = "John";
$message = 'Hello, World!';
?>

Strings can contain any characters, including letters, digits, and special symbols.

String Concatenation

Concatenation in PHP is used to join strings together into one string. The concatenation operator . (dot) is used for this purpose:

main


              1234567
            
<?php
$firstName = "John";
$lastName = "Doe";

$fullName = $firstName . " " . $lastName;  // `$fullName` will be `"John Doe"`
echo $fullName;
?>

Using Single and Double Quotes

You can use both '(single) and "(double quotes) to define strings. They have some differences in how they handle variables and special characters.

Double quotes allow variables to be directly used within the string and support escaping special characters:

main


              123456
            
<?php
$name = "John";
$message = "Hello, $name!";

echo $message;
?>

Single quotes treat everything inside them as literal text, ignoring variables and special characters:

main


              123456
            
<?php
$name = "John";
$message = 'Hello, $name!';

echo $message;
?>

Task

Swipe to show code editor

Assign any name to the variable $name.
Concatenate the strings using the . operator so that running the code outputs the greeting "Hello, SomeName!".

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 2. Chapter 3

Switch to desktop for real-world practiceContinue from where you are using one of the options below