What are some key factors to consider when starting a large project in PHP?

When starting a large project in PHP, some key factors to consider include proper project planning, modular code organization, use of design patterns, testing and debugging processes, and scalability for future growth.

// Example code snippet demonstrating modular code organization in PHP

// Define separate files for different components of the project
// For example, create files for database connection, user authentication, and data manipulation functions

// In main PHP files, include these separate files using require_once or include_once statements
require_once 'db_connection.php';
require_once 'user_auth.php';
require_once 'data_functions.php';

// This helps in organizing code into manageable chunks and promotes code reusability