Arrow Functions

Learn about the new features of arrow functions that were introduced in PHP 8.

We'll cover the following

Generic syntax
Arrow functions vs. anonymous functions
Variable inheritance
Practical example

Arrow functions were actually first introduced in PHP 7.4. However, as many developers do not follow every single release update, it’s important to include coverage of this excellent new feature.

In this lesson, we will learn about arrow functions and their syntax, as well as the advantages and disadvantages compared with anonymous functions.

Generic syntax

Simply put, an arrow function is a shorthand syntax for the traditional anonymous function, much like the ternary operator is a shorthand syntax for if () {} else {}. The generic syntax for an arrow function is shown here:

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Introduction

Section 1: PHP 8 Tips

Introducing New PHP 8 OOP Features

PHP 8's Functional Additions

Taking Advantage of Error-Handling Enhancements

Making Direct C Language Calls

Section 2: PHP 8 Tricks

Discovering Potential OOP Backward-Compatibility Breaks

Understanding PHP 8 Functional Differences

Avoiding Traps When Using PHP 8 Extensions

Learning about PHP 8's Deprecated or Removed Functionality

Section 3: Best Practices

Mastering PHP 8 Best Practices

Improving Performance

Migrating Existing PHP Apps to PHP 8

Creating PHP 8 Applications Using Asynchronous Programming

Conclusion

Arrow Functions

Generic syntax