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https://drive.google.com/file/d/1S7A7oHtICl4SZc91usFa7WTk1zbXVQfp/view?usp=sharing This document is a comprehensive set of lecture notes for a Web Technologies  course, organized into four primary modules that cover essential server-side and client-side web development technologies. Module I: PHP and Web Development Fundamentals PHP Basics : Introduces PHP as an interpreted, server-side scripting language embedded in HTML. It covers fundamental concepts like variable declaration (using the $  sign), data types (integers, doubles, booleans, strings, etc.), and basic syntax. Core Programming Constructs : Detailed explanations and examples of arrays (indexed, associative, multidimensional), operators (arithmetic, comparison, logical, assignment), and control structures like if , elseif , else , and switch . Advanced PHP Features : Covers functions, file handling (opening, reading, writing, and deleting files), and handling web form data using GET  and POST  met...