Php?

Building on the replies from @felgall, @GaryKing and @Alcides, here is a short, practical path from “what is PHP” to actually running and learning it in a modern, safe way.

A minimal local setup can be XAMPP/MAMP/LAMP or a Docker container; PHP also includes a built‑in dev server (run php -S localhost:8000 on systems with recent PHP). A tiny script to confirm the runtime and configuration is:

<?php
error_reporting(E_ALL);
ini_set('display_errors', '1');

phpinfo();
?>

Core learning stages: basic syntax (variables, arrays, control flow, functions), then forms/sessions and file I/O, then database access via PDO with prepared statements (avoid legacy mysql_* extensions). For passwords use password_hash/password_verify. When projects grow, use Composer for dependencies and consider a framework (Laravel/Symfony) to enforce structure and conventions. Helpful consolidated guidance is available at PHP: The Right Way. Composer info is at getcomposer.org.

Quick debugging and security notes: enable full error reporting during development but disable display_errors in production; use Xdebug for step debugging; log errors to files. Always validate and whitelist input, escape output with htmlspecialchars to prevent XSS, use CSRF tokens for state-changing forms, deploy over HTTPS, and keep secrets out of the webroot (use environment variables or a secure vault).

A compact first project—guestbook or TODO list storing entries with PDO (or SQLite)—covers forms, validation, sessions and DB access and exposes common pitfalls. The official manual is the reference; the links above give modern best practices and workflows that pair well with the earlier answers in this thread.