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Introduction to PHP

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

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

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