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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 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

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123456789

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

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

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.

Solution

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SectionΒ 4. ChapterΒ 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"
?>
Task

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.

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!

SectionΒ 4. ChapterΒ 3
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