Refactoring a Complex Algorithm in PHP: Issues with OOP Design Patterns
I'm following best practices but I'm building a feature where I've encountered a strange issue with I've searched everywhere and can't find a clear answer. Recently started working with a legacy PHP application that implements a complex algorithm for data analysis. The original codebase, built on PHP 7.4, heavily relies on procedural programming. As part of a refactoring effort, my goal is to transition this to an object-oriented design pattern for better maintainability and scalability. While attempting to encapsulate the functionality into a class structure, I faced challenges in managing dependencies effectively. For instance, I created a `DataAnalyzer` class to handle the core logic: ```php class DataAnalyzer { protected $data; public function __construct(array $data) { $this->data = $data; } public function analyze() { // Analysis logic } } ``` Next, I introduced a `DataLoader` class for fetching and preparing the data: ```php class DataLoader { protected $file; public function __construct($file) { $this->file = $file; } public function load() { // Load data from file return $data; } } ``` The problem arises when I try to instantiate these classes together. Using a simple approach to create the `DataAnalyzer` instance directly after loading data raises concerns about tight coupling. Ideally, I wanted to implement dependency injection to keep the classes decoupled and unit-testable. Here’s my current attempt at implementing this: ```php $loader = new DataLoader('data.json'); $data = $loader->load(); $analyzer = new DataAnalyzer($data); $analyzer->analyze(); ``` However, this setup is still quite rigid. I’ve read that employing a Dependency Injection Container could help manage these dependencies more efficiently. Although, I’m not sure how to integrate it properly within my existing codebase. Documentation suggests using Symfony's Dependency Injection component, but migrating to that feels like a substantial change. How can I refactor my current structure to leverage dependency injection without overhauling the entire application? Any insights on best practices or design patterns for this situation would be greatly appreciated. Also, if anyone has examples of similar transitions in PHP, that would be incredibly helpful! Any ideas what could be causing this? The stack includes Php and several other technologies. Am I missing something obvious? The project is a mobile app built with Php. Could this be a known issue? For context: I'm using Php on CentOS. Am I missing something obvious?