Even the most experienced programmers are confused about how to choose a programming language when performing a Web site or web App development task. The most common programming language choice is between PHP and ASP.net. However, both PHP and asp.net have large groups, and each programmer's opinion of PHP and ASP.net depends on their development experience and preferences. Therefore, such choices may depend more on preference. There is no clear answer here, but this article will help you identify the differences between PHP and ASP.net, and make choices based on your preferences, so that you can accomplish tasks more smoothly in your development projects. Platform and server platforms and servers are absolutely the main differences between the two, and this must be realized. PHP is a cross-platform server-side embedded scripting language that is completely free to run on Linux, UNIX, Mac OS, or Windows. On the other hand, ASP. NET is an object-oriented, compiler-oriented language. You can't have PHP running in a Windows program, but you can copy asp.net code and put it in the WinForm program without much modification. And, ASP. NET is restricted to the Windows platform. As a result, it has actually lost the advantage of open source-low-cost and highly supported technology communities. Speed and performance most programmers think that there is no real sense of performance and speed between PHP and ASP.net. But this is true, as long as you use PHP and asp.net on smaller or less complex projects, you'll find differences between them. However, if a larger web app needs to run more large programs, the programming language can, to some extent, affect speed. Second, the choice between PHP and ASP.net also takes into account the diversity of tasks. The following example shows that, starting with the simplest task, the app needs to access the database, process a query task, and transfer the processing results to the browser via the server. In this process, programming languages have little impact/difference on speed, but database servers and query programs may have some impact. Running an app on Linux or UNIX can give you the advantage of saving valuable resources that are consumed by GUI and additional packages, especially when running on Windows. PHP can perform better when it comes to finding and sending pictures to the server by accessing the file system, but thanks to Linux and Ext4 file systems that are superior to Windows OS and NTFS. developing, installing, and deploying most experienced programmers who have used both languages agree that developing projects on a asp.net basis will take more time. The reason is that it requires a lot of code, followed by the fact that each code needs to be compiled after it is decorated. In terms of installation and deployment, because ASP.net has many features in Windows OS, ASP.net also provides more caching. However, Linux has followed the latest version of ASP.net and made a more reasonable simplification in usability. Scalability from the above argument seems to be advocating the use of PHP, but in terms of scalability, ASP. NET is the real winner. ASP. NET uses C #, so you can provide more robust object-oriented support. Finally, choose PHP or choose ASP.net, depending on your skills, experience and, of course, customer needs. Ideally, it would be best to master both languages, no matter which one you use.