PHP Style and Best Practices

This is a list PHP coding style and best practices guides.

PHP-FIG

The ultimate source which most others are based on or recommend is PHP FIG (Framework Interoperability Group). These are their most important documents:

• PSR-1: Basic Coding Standard
• PSR-12: Extended Coding Style
• PER Coding Style 2.0
• PSR-4: Autoloader

Other PHP style guides

Some PHP frameworks and companies publish their own style guides. Most of them are based on PHP-FIG, but may deviate on particular recommendations (e.g. case to use for function or variable names).

PEAR Coding Standards

Symfony

• Symfony Coding Standards
• Coding Standards Fixer tool

Clean Code PHP

PHP the Right Way on coding style

Code Igniter style guide

Flow Framework style guide

Procurios style guide - One thing I like about this guide is that they list their differences from PHP-FIG PSR, which they are based on. It also includes a list of good coding style books (below).

Coding style books

• Robert C. Martin - Clean Code
• Robert C. Martin - The Clean Coder
• Martin Fowler - Patterns of Enterprise Application Architecture
• Martin Fowler - Refactoring: Improving the Design of Existing Code
• Steve McConnell - Code Complete 2
• Eric Evans - Domain-Driven Design