Page 5 - PHP

HATEOAS turns a PHP API into a real state machine: instead of clients building URLs themselves, every response ships the links that are actually allowed in the current state. This article shows a practical HATEOAS implementation in PHP with the HAL format, a custom link builder, and concrete examples from an order process.

PHP-FPM processes requests synchronously and blocking, a model that is well proven for classic web applications but reaches its limits with WebSockets, queue workers and heavy I/O load. Asynchronous PHP with Swoole or ReactPHP uses event loops and coroutines to manage thousands of concurrent connections in a single process, without ever leaving the PHP language.

Behind every require-free PHP project sits a simple, but often misunderstood mechanism: Composer autoloading translates namespace declarations from composer.json, through generated PHP files and a longest-prefix-match algorithm, into actual file paths. This article opens the black box: from composer dump-autoload through autoload_psr4.php to the ClassLoader::loadClass() method, step by step, with real, traceable code for PHP 8.4.

Mutable objects are one of the most common sources of hard-to-trace bugs: a value changes somewhere in the call graph, and nobody quite remembers where. Readonly Properties move this guarantee from convention to the language level, for individual properties since PHP 8.1, for entire classes since PHP 8.3, turning immutability into a property the interpreter itself enforces instead of merely documenting.

Optimistic locking and pessimistic locking are two fundamentally different strategies for preventing concurrent writes from silently overwriting each other. Understanding when a version column is enough and when a real database lock through SELECT FOR UPDATE is needed helps you avoid both silent data loss and unnecessary performance loss from overly cautious locking.

Most PHP developers only know PDO from query() and fetch(). Using PDO at an advanced level means controlling fetch modes deliberately, setting transaction boundaries with intent, and avoiding the typical performance traps in bulk operations that rarely show up in tutorials but appear daily in production code.

Many grown PHP projects consist of hundreds of free functions loosely held together by include files. This article shows how to migrate such procedural codebases to object-oriented PHP step by step, using recognizable extraction patterns instead of a risky full rewrite.

Once a team maintains more than a handful of internal PHP packages, distributing deploy keys and personal GitHub tokens in every single composer.json quickly becomes a security risk. Private Packagist bundles private Composer packages in its own registry with centralized permission management, without developers having to maintain their own credentials.

The clone keyword in PHP produces only a shallow copy by default, nested objects remain shared. With the __clone magic method, object cloning can be extended deliberately into a deep copy, including readonly properties and the classic Prototype pattern as a creation strategy.

Anyone who wants to automatically rewrite, check or generate PHP code cannot avoid AST manipulation. The nikic/php-parser library turns source code into a searchable node tree that custom NodeVisitor classes can read and modify precisely, before the code is printed back out as clean, valid PHP source.