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  • Book Overview & Buying Learning PHP 7 High Performance
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Learning PHP 7 High Performance

Learning PHP 7 High Performance

Buy this Book
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Learning PHP 7 High Performance

Learning PHP 7 High Performance

Buy this Book

Overview of this book

PHP is a great language for building web applications. It is essentially a server-side scripting language that is also used for general-purpose programming. PHP 7 is the latest version, providing major backward-compatibility breaks and focusing on high performance and speed. This fast-paced introduction to PHP 7 will improve your productivity and coding skills. The concepts covered will allow you, as a PHP programmer, to improve the performance standards of your applications. We will introduce you to the new features in PHP 7 and then will run through the concepts of object-oriented programming (OOP) in PHP 7. Next, we will shed some light on how to improve your PHP 7 applications' performance and database performance. Through this book, you will be able to improve the performance of your programs using the various benchmarking tools discussed. At the end, the book discusses some best practices in PHP programming to help you improve the quality of your code.
Table of Contents (11 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Setting Up the Environment
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1. Setting Up the Environment
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Setting up Windows
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Setting up Debian or Ubuntu
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Setting up CentOS
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Setting up Vagrant
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Summary
2
2. New Features in PHP 7
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2. New Features in PHP 7
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OOP features
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New operators
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Uniform variable syntax
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Miscellaneous features and changes
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Summary
3
3. Improving PHP 7 Application Performance
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3. Improving PHP 7 Application Performance
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NGINX and Apache
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HTTP server optimization
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HTTP persistent connection
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Content Delivery Network (CDN)
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CSS and JavaScript optimization
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Full page caching
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Varnish
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The infrastructure
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Summary
4
4. Improving Database Performance
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4. Improving Database Performance
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The MySQL database
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Storage engines
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The Percona Server - a fork of MySQL
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MySQL performance monitoring tools
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Percona XtraDB Cluster (PXC)
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Redis – the key-value cache store
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Memcached key-value cache store
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Summary
5
5. Debugging and Profiling
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5. Debugging and Profiling
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Xdebug
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Profiling with Xdebug
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PHP DebugBar
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Summary
6
6. Stress/Load Testing PHP Applications
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6. Stress/Load Testing PHP Applications
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Apache JMeter
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ApacheBench (ab)
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Siege
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Load testing real-world applications
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Summary
7
7. Best Practices in PHP Programming
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7. Best Practices in PHP Programming
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Coding styles
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Test-driven development (TDD)
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Design patterns
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Service-oriented architecture (SOA)
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Being object-oriented and reusable always
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PHP frameworks
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Version control system (VCS) and Git
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Deployment and Continuous Integration (CI)
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Summary
8
A. Tools to Make Life Easy
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A. Tools to Make Life Easy
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Composer – A dependency manager for PHP
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Git – A version control system
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Grunt watch
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Summary
9
B. MVC and Frameworks
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B. MVC and Frameworks
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The MVC design pattern
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Laravel
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Lumen
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Apigility
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Summary
10
Index
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Index

Uniform variable syntax

Most of the time, we may face a situation in which the method, variable, or classes names are stored in other variables. Take a look at the following example:

$objects['class']->name;

In the preceding code, first, $objects['class'] will be interpreted, and after this, the property name will be interpreted. As shown in the preceding example, variables are normally evaluated from left to right.

Now, consider the following scenario:

$first = ['name' => 'second'];
$second = 'Howdy';

echo $$first['name'];

In PHP 5.x, this code would be executed, and the output would be Howdy. However, this is not inconsistent with the left-to-right expression evaluation. This is because $$first should be evaluated first and then the index name, but in the preceding case, it is evaluated as ${$first['name']}. It is clear that the variable syntax is not consistent and may create confusion. To avoid this inconsistency...

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Tech Concepts
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Programming languages
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Learning PHP 7 High Performance
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