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Introduction to PHP
course content

Kursusindhold

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 ConceptWhile-LoopsDo-WhileFor-LoopsIncrement and Decrement

book
Associative Arrays

Associative arrays in PHP are arrays that provide a mapping between keys and values. They are used to store data in the form of key-value pairs, where each key is unique and associated with a specific value.

Creation Syntax

Associative arrays are created using the key operator => to establish the relationship between the key and the value. For example:

php

main

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$user = [
    "name" => "John",
    "age" => 30,
    "city" => "New York"
];

As a result, this code creates an associative array $user with three keys: "name", "age", and "city", and their corresponding values: "John", 30, and "New York". You can access these values using their respective keys:

php

main

copy

              
123456789

            
<?php
$user = array(
    "name" => "John",
    "age" => 30,
    "city" => "New York"
);

echo $user["name"]; // Output "John"
?>
Opgave

Swipe to start coding

Fill in the blanks in the code to create an associative array $person with three key-value pairs (e.g., 'name' => 'John', 'age' => 25, 'profession' => 'Engineer'). Then, access the value by the key 'name' and print it to the screen.

Løsning

Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 4. Kapitel 3
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book
Associative Arrays

Associative arrays in PHP are arrays that provide a mapping between keys and values. They are used to store data in the form of key-value pairs, where each key is unique and associated with a specific value.

Creation Syntax

Associative arrays are created using the key operator => to establish the relationship between the key and the value. For example:

php

main

copy

              
12345

            
$user = [
    "name" => "John",
    "age" => 30,
    "city" => "New York"
];

As a result, this code creates an associative array $user with three keys: "name", "age", and "city", and their corresponding values: "John", 30, and "New York". You can access these values using their respective keys:

php

main

copy

              
123456789

            
<?php
$user = array(
    "name" => "John",
    "age" => 30,
    "city" => "New York"
);

echo $user["name"]; // Output "John"
?>
Opgave

Swipe to start coding

Fill in the blanks in the code to create an associative array $person with three key-value pairs (e.g., 'name' => 'John', 'age' => 25, 'profession' => 'Engineer'). Then, access the value by the key 'name' and print it to the screen.

Løsning

Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 4. Kapitel 3
Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
Vi beklager, at noget gik galt. Hvad skete der?
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