Where can I find a free webhosting site that will support my formmail.php for testing purposes?

I need to find a webhost site to use as a testing ground for my formmail.php, and other PHP learning.
Does WAMP run on top of my Win32 (XPsp2 home) OS, or do I install it as a second boot OS? I like this option the best. Does it come with all of the how to use/setup

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