Variable declaration with dollar sign in PHP - Mini Project: Build & Apply

Variable declaration with dollar sign

📖 Scenario: Imagine you are creating a simple PHP script to store and display information about a fruit.

🎯 Goal: You will declare variables using the dollar sign, assign values, and then display the values.

📋 What You'll Learn

Declare variables with the dollar sign ($)

Assign string and integer values to variables

Use echo to display variable values

💡 Why This Matters

🌍 Real World

Variables with dollar signs are the basic way to store and use data in PHP scripts, such as in websites or apps.

💼 Career

Understanding variable declaration is essential for any PHP developer to write dynamic and interactive web pages.

1

Declare variables with dollar sign

Create a variable called $fruit and assign it the value "Apple". Also create a variable called $quantity and assign it the value 5.

PHP

<?php

# Declare the variables $fruit and $quantity with the given values

Need a hint?

Remember, in PHP, all variables start with a dollar sign ($).

2

Add a variable for price

Create a variable called $price and assign it the value 2.5.

PHP

<?php
$fruit = "Apple";
$quantity = 5;

# Declare the variable $price with the value 2.5

Need a hint?

Use the dollar sign ($) before the variable name and assign the value with =.

3

Calculate total cost

Create a variable called $total and assign it the value of $quantity multiplied by $price.

PHP

<?php
$fruit = "Apple";
$quantity = 5;
$price = 2.5;

# Calculate $total as $quantity times $price

Need a hint?

Use the * operator to multiply variables.

4

Display the total cost

Use echo to display the text: Total cost for 5 Apples is 12.5 using the variables $quantity, $fruit, and $total.

PHP

<?php
$fruit = "Apple";
$quantity = 5;
$price = 2.5;
$total = $quantity * $price;

# Display the total cost using echo and variables

Need a hint?

Use double quotes "" to include variables inside the string with echo.