PHP Arrow Functions

Arrow functions (PHP 7.4+) provide a shorter syntax for simple functions. They automatically capture variables from the parent scope - no more use keyword needed!

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Arrow Function Syntax

<?php
// Traditional
$multiply = function($x, $y) {
    return $x * $y;
};

// Arrow function
$multiplyArrow = fn($x, $y) => $x * $y;
?>

Automatic Variable Capture

<?php
$factor = 10;

// No 'use' needed!
$scale = fn($n) => $n * $factor;

echo $scale(5);  // 50
?>

Summary

What's Next?

Next, learn about Variadic Functions - handling variable numbers of arguments!