Xampp is a facilitator that installs php, apache and mysql, leaving you free to perform any extra configuration. This is good for facilitating the assembly of a development environment, but is not a well seen option for production servers.
The fact that you are free to configure everything the way you need, and have an interface to administer your services reinforces the argument that resistance to the use of this type of facilitator is the purism of some developers.
It is worth noting that the installation of these tools in Unix-based systems is by package managers and not done in a "manual" way. So there is no argument that installing everything manually is better than using these facilitators.
Something bad about using this type of feature is the fact that decent servers do not have a graphical interface or are Linux, getting you stuck with a facilitator like this.
I have used one of these facilitators and I can tell you that, if the services are properly configured, it will suit you well.
Now if I can give you a hint, I suggest you do not use desktop operating systems on servers. I suggest you use a folder or other linux distro, since installing apache, php and mysql is much simpler than in windows.
EDIT
Just to get rich: Any internet search on this subject returns blog posts or forums where the author says there are problems with incompatibilities and strange error messages. However the posts are totally frivolous and lack more details, leading me to further reinforce that the resistance is purism and the complaints amateurism.
Strange errors and messages occur due to poor configuration, not the fault of the facilitator. The same goes for compatibility.
Of course this Edit is just my point of view.
Windows 7 is a Desktop system, using it as a production server is a shot in the foot. Xampp is configured for development purposes, not production. I recommend researching best practices on how to correctly deploy a PHP server instead of going after the easy one. If you want to take those risks, good luck.
– gmsantos