Learn Strings | Variables and Data Types

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

main.php


              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.php


              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.php


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

echo $message;
?>

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

main.php


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

echo $message;
?>

Task

Swipe to start coding

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

Solution

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Thanks for your feedback!

Section 2. Chapter 3

single

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

main.php


              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.php


              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.php


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

echo $message;
?>

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

main.php


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

echo $message;
?>

Task

Swipe to start coding

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

Solution

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Everything was clear?

Thanks for your feedback!

Section 2. Chapter 3

single

Strings

String Concatenation

Using Single and Double Quotes

Solution

Awesome!

Strings

String Concatenation

Using Single and Double Quotes

Solution

Awesome!