Anonymous function syntax in PHP - Mini Project: Build & Apply

Anonymous function syntax

📖 Scenario: You are creating a small PHP script to greet users with a custom message. You want to use an anonymous function to keep your code neat and reusable.

🎯 Goal: Build a PHP script that defines an anonymous function to greet a user by name and then calls that function.

📋 What You'll Learn

Create an anonymous function assigned to a variable called greet

The anonymous function should accept one parameter called name

The function should return a greeting string like "Hello, [name]!"

Call the anonymous function with the name "Alice" and print the result

💡 Why This Matters

🌍 Real World

Anonymous functions are useful for quick, small tasks like callbacks, event handlers, or short reusable code blocks without naming them.

💼 Career

Understanding anonymous functions helps you write cleaner, more flexible PHP code, which is valuable in web development and backend programming jobs.

1

Create the anonymous function variable

Create an anonymous function and assign it to a variable called greet. The function should accept one parameter called name.

PHP

<?php

// Create an anonymous function assigned to $greet that accepts $name
// Your code here

Need a hint?

Use function($name) { } syntax and assign it to $greet.

2

Add greeting message inside the function

Inside the anonymous function assigned to $greet, return the string "Hello, " concatenated with the $name parameter and an exclamation mark.

PHP

<?php

$greet = function($name) {
    // Return greeting message here
    // Your code here
};

Need a hint?

Use the dot operator . to join strings in PHP.

3

Call the anonymous function with a name

Call the anonymous function stored in $greet with the argument "Alice" and assign the result to a variable called $message.

PHP

<?php

$greet = function($name) {
    return "Hello, " . $name . "!";
};

// Call $greet with "Alice" and assign to $message
// Your code here

Need a hint?

Call the function like $greet("Alice") and save it to $message.

4

Print the greeting message

Print the variable $message to display the greeting.

PHP

<?php

$greet = function($name) {
    return "Hello, " . $name . "!";
};

$message = $greet("Alice");

// Print $message
// Your code here

Need a hint?

Use print($message); to show the greeting.