Array access and modification in PHP - Mini Project: Build & Apply

Array access and modification

📖 Scenario: You are managing a small fruit store inventory. You have a list of fruits and their quantities. You want to update the quantities as fruits are sold or restocked.

🎯 Goal: Learn how to access and modify values in an array in PHP by updating fruit quantities.

📋 What You'll Learn

Create an associative array with fruit names as keys and quantities as values

Create a variable to hold the quantity to add or subtract

Modify the quantity of a specific fruit in the array

Print the updated array

💡 Why This Matters

🌍 Real World

Managing inventory in a store requires updating quantities as items are sold or restocked.

💼 Career

Knowing how to access and modify arrays is essential for backend development and data management.

1

Create the initial fruit inventory array

Create an associative array called fruits with these exact entries: 'apple' => 10, 'banana' => 5, 'orange' => 8.

PHP

# Create the 'fruits' array with the given entries
# Your code here

Need a hint?

Use square brackets [] to create an associative array with keys and values.

2

Create a variable for quantity change

Create a variable called change and set it to -3 to represent selling 3 fruits.

PHP

 10, 'banana' => 5, 'orange' => 8];
# Create the 'change' variable and set it to -3
# Your code here

Need a hint?

Use the = sign to assign the value -3 to the variable change.

3

Modify the quantity of bananas

Update the quantity of banana in the fruits array by adding the value of change to it.

PHP

 10, 'banana' => 5, 'orange' => 8];
$change = -3;
# Update the quantity of 'banana' by adding 'change'
# Your code here

Need a hint?

Use $fruits['banana'] += $change; to add change to the current banana quantity.

4

Print the updated fruits array

Use print_r to display the updated fruits array.

PHP

 10, 'banana' => 5, 'orange' => 8];
$change = -3;
$fruits['banana'] += $change;
# Print the 'fruits' array
# Your code here

Need a hint?

Use print_r($fruits); to print the array in a readable format.