Array key and value extraction in PHP - Mini Project: Build & Apply

Array key and value extraction

📖 Scenario: You have a list of products with their prices stored in an array. You want to separate the product names and their prices into two different arrays for easier use later.

🎯 Goal: Build a PHP script that extracts the keys (product names) and values (prices) from an associative array into two separate arrays.

📋 What You'll Learn

Create an associative array called $products with exact entries: 'Apple' => 150, 'Banana' => 50, 'Cherry' => 200

Create a variable called $productNames to hold the keys from $products

Create a variable called $productPrices to hold the values from $products

Print the $productNames array

Print the $productPrices array

💡 Why This Matters

🌍 Real World

Extracting keys and values from arrays is common when working with data like product lists, user information, or settings.

💼 Career

Many jobs require handling associative arrays or dictionaries to organize and process data efficiently.

1

Create the products array

Create an associative array called $products with these exact entries: 'Apple' => 150, 'Banana' => 50, 'Cherry' => 200.

PHP

# Your code here

Need a hint?

Use square brackets [] to create the array and separate each key-value pair with a comma.

2

Extract the product names

Create a variable called $productNames and set it to the keys of the $products array using the array_keys() function.

PHP

 150, 'Banana' => 50, 'Cherry' => 200];
# Your code here

Need a hint?

Use the array_keys() function to get all keys from an array.

3

Extract the product prices

Create a variable called $productPrices and set it to the values of the $products array using the array_values() function.

PHP

 150, 'Banana' => 50, 'Cherry' => 200];
$productNames = array_keys($products);
# Your code here

Need a hint?

Use the array_values() function to get all values from an array.

4

Print the product names and prices

Print the $productNames array and then print the $productPrices array using print_r().

PHP

 150, 'Banana' => 50, 'Cherry' => 200];
$productNames = array_keys($products);
$productPrices = array_values($products);
# Your code here

Need a hint?

Use print_r() to display arrays in a readable format.