Arrow Functions in PHP

In this lesson, we will begin to study arrow functions. They represent a shortened version of anonymous functions. Their syntax looks like the following:

<?php
	fn (parameters) => expression;
?>

Let's rewrite a regular function as an arrow function. Suppose we have a function for adding two numbers:

<?php
	$func = function($num1, $num2)
	{
		return $num1 + $num2;
	};
	
	echo $func(1, 2);
?>

Now let's make it an arrow function:

<?php
	$func = fn($num1, $num2) => $num1 + $num2;
	echo $func(1, 2);
?>

Rewrite the following function into an arrow function:

<?php
	$greet = function($name)
	{
		return 'hello ' . $name;
	};
	
	echo $greet('fred');
?>