WEB DEVELOPMENT
Web Development: Learn HTML, CSS, JavaScript, PHP, React & More
Learn how websites and web applications are built with practical guides covering HTML, CSS, JavaScript, PHP, React, Laravel and website APIs. Understand the technologies behind modern websites and how they work together.
- Frontend, backend and full-stack explained
- Clear, technically accurate guides
- Built around real website projects
https://<main>{ display:grid }addEventListener()Route::get()GET /apiSELECT *THE BASICS
What Is Web Development?
Web development is the work of building and maintaining websites and web applications — turning plans and designs into pages that load in a browser, respond to visitors and store or retrieve information. It ranges from a simple brochure site to complex applications with user accounts, payments and live data.
Development is usually split into two areas. Frontend development covers everything that runs in the browser: HTML for structure, CSS for presentation and JavaScript for interaction. Backend development runs on the server, using languages such as PHP to process requests, apply business logic and read or write data in a database.
Frameworks like React and Laravel give developers tested structures and reusable tools so they don’t rebuild common features from scratch. APIs connect the pieces, letting the frontend, backend and third-party services exchange data.
Web development is closely related to, but different from, web design. Design decides how a website should look and feel; development makes it work — reliably, securely, accessibly and quickly.
Key building blocks
- Frontend: HTML, CSS, JavaScript
- Backend: server-side languages like PHP
- Databases for storing content and data
- APIs for connecting systems
- Frameworks such as React and Laravel
- Tools for testing, versioning and deployment
DESIGN VS DEVELOPMENT
Web Design vs Web Development
The two disciplines overlap on most projects, but they answer different questions: how should it look? and how will it work?
Web Design
Web design focuses on how a website looks and feels: visual appearance, layout, typography, colour, UI elements, UX and visual hierarchy. Designers decide what goes where and why, often producing wireframes and mockups.
Web Development
Web development makes those designs function: HTML, CSS and JavaScript in the browser, PHP and frameworks on the server, APIs, backend logic, databases and all the functionality behind forms, logins and dynamic content.
| Aspect | Web Design | Web Development |
|---|---|---|
| Main focus | Appearance and user experience | Functionality and performance |
| Typical output | Wireframes, mockups, style guides | Working code, databases, integrations |
| Core skills | Layout, typography, colour, UI/UX | HTML, CSS, JavaScript, PHP, APIs |
| Tools | Figma, design systems, prototypes | Code editors, Git, frameworks, servers |
THE BIG PICTURE
How Does a Website Work?
Every time someone opens a page, a short round trip happens in the background. The browser sends an HTTP request, the server runs application code, fetches any data it needs and sends back a response the browser turns into the page you see.
TOPIC GUIDES
Explore Web Development Topics
Explore practical Web Development guides covering the core technologies used to build websites and web applications, from HTML and CSS to JavaScript, PHP, modern frameworks and APIs.
HTML
Learn the structure and meaning of web pages with practical HTML guides covering elements, headings, links, forms, images, semantic markup and document structure.
CSS
Learn how CSS controls the appearance and layout of websites, including selectors, spacing, typography, responsive layouts, grids, flexbox and modern styling techniques.
JavaScript
Understand how JavaScript adds interaction and dynamic behavior to websites, from browser events and DOM manipulation to modern JavaScript techniques.
PHP
Explore PHP fundamentals and how server-side programming powers dynamic websites, forms, WordPress functionality, database interactions and web applications.
React
Learn the fundamentals of React and component-based frontend development, including components, props, state, rendering and reusable interfaces.
Laravel
Understand Laravel's approach to modern PHP development, including routing, controllers, models, authentication, databases and application structure.
Website APIs
Learn how APIs allow websites and applications to exchange data and connect with external services, applications and backend systems.
FRONTEND
Frontend Development: What Users See
Frontend development covers everything that runs in the visitor’s browser. The browser downloads HTML, CSS and JavaScript, builds the page structure, applies styles and then runs scripts that make the interface respond to clicks, typing and scrolling.
Good frontend work goes beyond appearance. Interfaces need to be responsive across screen sizes, accessible to keyboard and screen-reader users, and light enough to load quickly on mobile connections. Each extra script or oversized image has a cost the visitor pays in waiting time.
HTML — Structure
Defines headings, paragraphs, links, forms and images, and gives content meaning that browsers and assistive technology understand.
CSS — Presentation
Controls colour, typography, spacing and layout with tools such as flexbox, grid and media queries for responsive design.
JavaScript — Interaction
Handles events, updates the page without reloading and powers menus, sliders, form validation and dynamic content.
BACKEND
Backend Development: What Happens Behind the Scenes
Backend development handles what visitors don’t see. When a browser sends a request — submitting a contact form, logging in or loading a product list — server-side code decides how to respond.
That code applies business logic, checks authentication, validates input and talks to a database or external API. Languages such as PHP and frameworks such as Laravel are widely used for this, and PHP also powers WordPress. The backend then sends a response: an HTML page, or data in a format like JSON.
Because the backend handles user data and credentials, security, reliability and clear structure matter as much as features.
- Server-side logic and routing
- Authentication and user sessions
- Database queries and storage
- APIs and third-party integrations
FULL STACK
How Frontend and Backend Work Together
On a real website the frontend and backend constantly exchange information. The frontend — built with HTML, CSS, JavaScript and sometimes a library like React — collects input and displays results. It sends requests over HTTP, often to an API endpoint.
The backend, written in PHP or built with Laravel, receives those requests, checks permissions, runs the relevant logic and reads or updates data in a database or external service. It then returns a response, commonly HTML for a full page or JSON for a small piece of data the frontend can slot into the interface.
A developer comfortable across both layers is often called a full-stack developer. Even if you specialise, understanding how the layers connect makes debugging easier, helps you design better APIs and lets you make sensible decisions about where each piece of logic should live — in the browser, on the server or in a separate service.
HTML · CSS · JS · ReactJSONPHP · LaravelSQLMySQL · APIsTHE FOUNDATION
HTML, CSS and JavaScript: The Core of the Web
Every website, whatever platform or framework it uses, ultimately reaches the browser as these three languages. Learning them well pays off in every other area of web development.
HTML: Structure
HTML is the skeleton of every page. Semantic elements like header, nav, main, article and button describe what content is, which helps browsers, search engines and screen readers.
CSS: Style
CSS separates presentation from content. Selectors target elements; properties control spacing, colour and type; flexbox, grid and media queries build responsive layouts.
JavaScript: Behavior
JavaScript listens for events and updates the DOM, letting pages validate forms, load new content and respond instantly without a full reload. Use it where it genuinely adds value.
SERVER-SIDE
PHP and Laravel for Server-Side Development
PHP is a programming language; Laravel is a framework written in PHP. PHP runs on the server and generates dynamic content, which is why it powers platforms like WordPress. Laravel adds a structured way to build applications on top of it, with built-in tools for routing, controllers, database models, validation and authentication.
You can build with plain PHP, but a framework helps larger projects stay organised and consistent. Start with our PHP fundamentals, then explore Laravel development guides once the basics feel comfortable.
Common use cases
Dynamic websites
Authentication
Forms
Databases
APIs
Backend applications
REACT
What Is React Used For?
React is a JavaScript library for building user interfaces from small, reusable pieces called components. A button, a product card or a whole navigation bar can each be a component that receives data through props and keeps track of changing information in state.
When state changes, React re-renders the affected parts of the interface, which makes it well suited to dynamic interfaces such as dashboards, filters, booking tools and single-page applications. It handles the view layer only, so it is usually paired with a backend or API for data.
React isn’t necessary for every website. Content-focused sites often work well with standard HTML, CSS and a little JavaScript; React earns its place when an interface has lots of interactive, frequently changing state.
APIs
What Are Website APIs?
An API (application programming interface) is a defined way for one piece of software to request data or actions from another. On websites, APIs let the frontend talk to the backend and let your site connect to services such as payment gateways, maps, email platforms and CRMs.
Most web APIs follow a request/response pattern over HTTP. A client sends a request to an endpoint — for example GET /products — and the API returns a response, commonly formatted as JSON. REST APIs organise endpoints around resources and standard HTTP methods like GET, POST, PUT and DELETE.
Many APIs require authentication, using API keys or tokens, so only authorised clients can read or change data. Learn how to use and build them in our website API guides.
PROCESS
A Typical Web Development Workflow
Projects vary, but most follow a similar path from idea to launch. Steps often overlap and repeat as you learn more.
Plan
Define goals, audience, features and scope before writing code.
Structure
Map pages, content and data models; sketch the information architecture.
Design
Create wireframes and visual designs that development will follow.
Develop
Build the frontend and backend, integrate APIs and use version control.
Test
Check functionality, responsiveness, accessibility, performance and security.
Deploy & Maintain
Launch, monitor, update dependencies and improve over time.
BEST PRACTICES
Web Development Best Practices
These habits apply whether you are writing plain HTML or building a Laravel application.
Semantic HTML
Use elements for their meaning, not just their appearance. Proper headings, lists and buttons improve accessibility, maintainability and how machines interpret content.
Responsive Development
Build flexible layouts with relative units, flexbox, grid and media queries so pages adapt to any screen without horizontal scrolling.
Accessible Interfaces
Support keyboard use, visible focus states, labelled form fields and sufficient contrast so more people can use what you build.
Secure Coding
Validate and sanitise input, use prepared statements, protect against CSRF and XSS, keep software updated and never expose secrets in code.
Performance Optimization
Ship less code, optimise images, cache sensibly and load scripts only where they're needed to keep pages fast.
Maintainable Code
Use clear naming, consistent structure, version control and documentation so you — or someone else — can safely change the code later.
PERFORMANCE
Why Performance Matters in Web Development
Performance is shaped heavily by development decisions. Every request, script and image adds to what the browser must download and process before a visitor can use the page. Efficient code, properly sized and compressed images, sensible caching and removing unnecessary scripts all reduce that load.
Google’s Core Web Vitals measure aspects of real-world experience such as loading, responsiveness and visual stability. Performance is one of many factors in search, so a fast site won’t rank on speed alone — but a slow one frustrates visitors, particularly on mobile. Dig deeper in our website speed guides and see how it connects to technical SEO.
Performance checklist
- Minimise and defer unnecessary JavaScript
- Serve responsive, compressed images
- Use browser and server caching
- Reduce render-blocking CSS
- Avoid layout shifts with sized media
- Test on real mobile connections
ACCESSIBILITY
Accessibility Is Part of Good Development
Accessibility starts in the code. Semantic HTML gives assistive technologies the structure they need, while native elements such as buttons and links come with keyboard support built in. Custom components need visible focus states and appropriate ARIA only where native HTML can’t do the job.
Forms need proper labels and clear error messages; images need meaningful alt text; text needs sufficient contrast. Testing with only a keyboard and a screen reader reveals issues automated tools miss. Read more in our website accessibility guides.
Developer accessibility checklist
- Semantic HTML
- Keyboard navigation
- Visible focus states
- Labelled form controls
- Meaningful alt text
- Sufficient colour contrast
- Screen-reader testing
- Accessible error messages
FAQ
Frequently Asked Questions About Web Development
KEEP LEARNING
Explore Related Website Topics
Web Design
Layout, UI/UX, responsive design and accessibility principles.
WordPress
Themes, plugins and building sites on the PHP-powered CMS.
Website SEO
Technical and on-page SEO for well-built websites.
Website Speed
Core Web Vitals, caching and front-end optimisation.
AI for Websites
Practical AI tools for coding, content and workflows.
Hosting & Domains
Choosing hosting, managing domains and deploying sites.
Ready to Explore Web Development?
Start with the fundamentals and explore practical guides covering HTML, CSS, JavaScript, PHP, React, Laravel and website APIs.