MySpace and MSN are the two most popular websites built on ASP.Net. ASP.Net framework requires a Windows operating system and generally connects with MySQL database. The operating system on which the application is running also influences its performance. When compared to Windows NTFS system, the Linux and ExT4 file system provides better speed and performance. Hence, PHP applications running on a Linux server are more likely to offer better performance than ASP.Net applications running on a windows server.

PHP vs ASP.Net: Security

Both ASP.Net and PHP servers include very good security architecture to defend and reduce the cyber-attacks. The usual PHP program is vulnerable to Cross-site scripting and SQL injection; however, the attack can be prevented with PHP frameworks like CodeIgniter and CakePHP. PHP includes several in-built functions to enforce security against these security attacks.

Along with all the other security countermeasures, ASP.Net framework comes with type-safe SQL parameters that take all incoming values as a literal value; hence, SQL server doesn’t treat it as executable code. 

PHP vs ASP.Net: Time of development

When compared to PHP, ASP.Net framework requires more code to complete complex tasks, which increases the development time. With ASP.Net, you need to compile the code each time when the code is modified. As PHP is interpreted directly from the server, you do not need to compile each time you edit the code.

PHP vs ASP.Net: Support

When comparing PHP vs ASP.Net in terms of support, the open-source language PHP includes a community of developers, which is far more than ASP.Net framework. Developers in vibrant communities are posting regularly on the online forums, and they address a solution to your problem promptly. In contrast, though the ASP.Net communities include dedicated developers, quite a few active contributors post on the forums and offer solutions to the ASP.Net challenges.

PHP vs ASP.Net: Compatibility

PHP is an open-source and free language, whereas Microsoft owns ASP.Net framework; hence, it is subjected to web hosting fees. PHP is platform-independent and works with several different platforms like OSX, UNIX, Windows, and Linux while ASP.Net depends on Windows platforms.

The language syntax of PHP is very similar to C, Java or JavaScript. If you are familiar with these popular cross-platform languages, PHP is not difficult for you to understand.

Developing web apps in ASP.Net require you to do it in Microsoft platform called Visual studio, but in PHP, it can be through any text editor like Atom, Sublime Text, or notepad.

PHP vs ASP.Net: Development Cost

Both PHP and ASP.Net are free to use, but the development platform for .Net is costly. It is always less expensive to develop any website or apps with open source languages like PHP. In addition, comparatively, ASP.Net demands more server resources.

While PHP is cost-effective and ideal for SME businesses with speed, security, and reliability at its core, ASP.Net framework still includes a lot to offer. Language independence, security, smooth dynamic web pages, scalability, and remarkable interfaces are a few.

Overall, both PHP and ASP.Net are excellent options, providing all basic functionality to build web apps. Whether your decision narrows down to the comfort level, cost or support resources, PHP can be the better choice over ASP.Net. However, ASP.Net still stands among the best server-side programming languages and is extensively accomplishing several complex web development tasks.