Web development takes into account many security considerations, such as data entry error checking through forms, filtering output, and encryption.[2] Malicious practices such as SQL injection can be executed by users with ill intent yet with only primitive knowledge of web development as a whole.

Basic

In practice, many web developers will have basic interdisciplinary skills / roles, including:

1. Graphic design / web design  
   
2. Information architecture and copywriting/copyediting with web usability, accessibility and search engine optimization in mind  
   

The above list is a simple website development hierarchy and can be extended to include all client side and server side aspects.

Web Development can be split into many areas and a typical and basic web development hierarchy might consist of:

Client side coding

1. Ajax Asynchronous JavaScript provides new methods of using JavaScript, and other languages to improve the user experience. 
   
2. Flash Adobe Flash Player is a ubiquitous browser plugin ready for RIAs. Flex 2 is also deployed to the Flash Player (version 9+).

Since the commercialization of the web, web development has been a growing industry. The growth of this industry is being pushed especially by businesses wishing to sell products and services to online customers.

For tools and platforms, the public can use many open source systems to aid in web development. A popular example, the LAMP (Linux, Apache, MySQL, PHP) stack is available for download online free of charge.