What are some fundamental differences between how a site is built in PHP compared to using web forms in ASP.NET?

Programming Language is Different One is Using PHP and AspDotNet Webform uses C# or other dotnet supported language
In AspDotNet Webforms you can use Visual Studio IDE that provides Easy Project Management , TFS for Version Control and Working in Teams , Automatically Managed Project Structure and Various other VS IDE features like to Search block of code in current document or entire project and many more I can’t list them all here

Where as in PHP you have paid IDE’s and less free ide’s otherwise Notepad , Notepad++ , espresso and other options are there but there is some lack of Mature IDE’s like VS here .

Debugging - In AspDotNet webform VS greatly make a difference By providing Awesome Debugging Tools for Error finding
Where as in PHP there is lack of some mature debuggers and sometimes choosing on of available debuggers create pain in setup Them .

AspDotnet & PHP Both are opensource now Even we have Community editions available for VS

Most people deploy aspdotnet website on windows but Both are Cross-Platform now . php is available to be deployed on linux server and aspdotnet is also now available to be deployed on linux servers

C# is faster than php but this difference can be at execute of approximately 2,000,000 loops of execution

See its not important you must have Nuclear Weapons on your side . If you utilize your tools in a proper & Efficient way then they all proves to be good .

We have Many website in php that are performing exceptionally good and also there is list of website that are creating problems in php But its the programmer that is using php code to built website not php automatically generating a website .

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