String interpolation in double quotes in PHP - Mini Project: Build & Apply

String interpolation in double quotes

📖 Scenario: You are creating a simple PHP script to greet users by their names. You want to learn how to insert variables inside double-quoted strings so the greeting message shows the user's name directly.

🎯 Goal: Build a PHP script that stores a user's name in a variable and then prints a greeting message using string interpolation inside double quotes.

📋 What You'll Learn

Create a variable called $name with the exact value "Alice".

Create a variable called $greeting that uses double quotes and string interpolation to include the $name variable in the message: Hello, Alice! Welcome.

Print the $greeting variable to display the message.

💡 Why This Matters

🌍 Real World

String interpolation is useful when you want to create messages or text that include changing information, like user names or dates.

💼 Career

Many web developers use PHP to build dynamic websites where personalized messages are common, so knowing string interpolation is essential.

1

Create the $name variable

Create a variable called $name and set it to the string "Alice".

PHP

<?php

// Create a variable called $name and set it to "Alice"
// Your code here

Need a hint?

Use = to assign the string "Alice" to the variable $name.

2

Create the $greeting variable with interpolation

Create a variable called $greeting and set it to the string "Hello, $name! Welcome." using double quotes so that $name is replaced by its value.

PHP

<?php

$name = "Alice";

// Create a variable called $greeting that uses double quotes and includes $name
// Your code here

Need a hint?

Use double quotes around the string and include $name directly inside to interpolate.

3

Print the $greeting message

Use echo to print the $greeting variable so the message appears on the screen.

PHP

<?php

$name = "Alice";
$greeting = "Hello, $name! Welcome.";

// Print the $greeting variable
// Your code here

Need a hint?

Use echo followed by the variable name to display the message.

4

Run the script to see the output

Run the PHP script and confirm that it prints exactly: Hello, Alice! Welcome.

PHP

<?php

$name = "Alice";
$greeting = "Hello, $name! Welcome.";
echo $greeting;

// Run the script and check the output

Need a hint?

Make sure you run the script in a PHP environment and check the exact output.