This article explains the internal implementation of PHP arrays, detailing the _Bucket and _zend_array structures, hash table mechanics, packed versus hash arrays, and how PHP maintains element order through an auxiliary index table.
The article traces the origins of the Zend Engine, its role as PHP’s core, the corporate shifts after its acquisition by Rogue Wave, and the recent departure of its key developers, highlighting community concerns and hopes for future contributions to PHP 8.
This article explains how PHP, as a scripted language, is compiled to intermediate code and run by the Zend virtual machine, detailing the VM’s role, JIT compilation, execution stacks, php‑fpm workflow, and key questions about OpCache and configuration loading.
This article demonstrates how to create a PHP extension that adds a str_concat function, explaining the underlying zend_string structure, required macros, and providing complete source code to handle prefix detection and string concatenation within the extension.
This article introduces developers to the fundamentals of locating, navigating, and understanding PHP 5.4's C source code, covering the repository, directory structure, essential C concepts, and the role of the Zend engine and extensions.
This article explores PHP's underlying architecture, covering its design philosophy, four‑layer system (Zend engine, extensions, SAPI, and applications), execution flow with opcodes, core data structures like HashTable, and the internal representation of variables via zval, providing deep insight for backend developers.
This article examines the PHP7 alpha release, detailing how its revamped Zend engine, memory management, hash handling, and new opcodes dramatically improve execution speed, while also introducing type declarations, exception handling, anonymous classes, and the Swoole extension for asynchronous programming.
