Book Image

Building RESTful Web Services with PHP 7

By : Waheed ud din
Book Image

Building RESTful Web Services with PHP 7

By: Waheed ud din

Overview of this book

REST is the most wide spread and effective standard to develop APIs for internet services. With the way PHP and its eco-system has modernized the way code is written by simplifying various operations, it is useful to develop RESTful APIs with PHP 7 and modern tools. This book explains in detail how to create your own RESTful API in PHP 7 that can be consumed by other users in your organization. Starting with a brief introduction to the fundamentals of REST architecture and the new features in PHP 7, you will learn to implement basic RESTful API endpoints using vanilla PHP. The book explains how to identify flaws in security and design and teach you how to tackle them. You will learn about composer, Lumen framework and how to make your RESTful API cleaner, secure and efficient. The book emphasizes on automated tests, teaches about different testing types and give a brief introduction to microservices which is the natural way forward. After reading this book, you will have a clear understanding of the REST architecture and you can build a web service from scratch.
Table of Contents (16 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Errors and exceptions

In PHP7, most are now reported as exceptions. Only a few fatal errors halt script execution; otherwise, if you are carrying out error or exception handling, it will not halt the script. This is because now the Errors class implements a Throwable interface just like the Exception class, which also implements Throwable. So now, in most cases, fatal errors can be avoided through exception handling.

Here are some sub-classes of the error class:

  • TypeError
  • ParseError
  • ArithmeticError
    • DivisionByZeroError
  • AssertionError

This is how you can simply catch an error and handle it:

try {
} catch(Throwable $error){
    echo $error->getMessage(); //Call to undefined function fn()

Here, $error->getMessage() is a method that is actually returning this message as a string. In our preceding example, the message will be similar to this: Call to undefined function fn().

This is not the only method you can use. Here is a list of methods that are defined in the Throwable interface...