This report provides a comprehensive overview of web application development, covering key aspects from initial design to final testing. It begins by evaluating the functions and advantages of web applications, comparing different client-side and server-side scripting languages, and examining web security with recommendations for improvements. The report then details the design of a web application based on a given case study, synthesizing client-side and server-side functionalities, and applying a suitable database design. The implementation phase is thoroughly discussed, focusing on utilizing client-side and server-side scripting languages according to the prepared design, and identifying and implementing error handling and reporting mechanisms. Finally, the report delves into testing the web application using a web-enabled database management system, analyzing test results to identify discrepancies, evaluating independent feedback for potential improvements, and creating user documentation. This detailed exploration aims to provide a thorough understanding of the entire web application development process.