ⓅThe Complete PHP Guide: Symbols, Syntax, and Inner Workings Welcome to the ultimate, all-encompassing guide to PHP. Whether you are a complete beginner or a seasoned developer looking for a refresher, this guide covers everything—from its core definition to the tiniest symbolic operators. --- 1. TITLE: What is PHP? PHP (recursive acronym for PHP: Hypertext Preprocessor) is a widely-used, open-source, server-side scripting language designed primarily for web development. · Creator: Rasmus Lerdorf (1994). · Current Stable Version: PHP 8.x (JIT compilation included). · Paradigm: Procedural, Object-Oriented, and Functional. · Execution: Embedded directly within HTML code and executed on the web server, generating dynamic web content. --- 2. HOW DOES PHP WORK? (The Lifecycle) PHP is a server-side language, meaning the code is executed on the host server, not the user's browser. Here is the step-by-step flow: 1. User Request: A browser requests a .ph...