You can't use PHP in an HTML document, but you can use HTML in PHP script.
http://www.w3schools.com/HTML/
The html converters that are free to use are HTML Converter and Free HTML Converter. These two websites do a great job at converting html files to whatever you need.
You can't use HTML on Facebook.
Use an html snippet
You can use some HTML for pictures and formatting, but not all HTML can be used (for security purposes). Note that you might need to play around a bit to get HTML to work.
Yes. if you look at page source you will see <html> and other HTML tags.
html code can be copied and pasted. It can be reused.
HTML was introduced to the public in 1990. There were no rules that prohibited commercial use.
yes you can use any text editing software to make a HTML file. Just use the rules of HTML and save it as htm or HTML and your good to go.
Go to the Friendster homepage, and view the source it gives you. That is the HTML they use. However, they most likely use a dynamic language to generate this HTML.
Because HTML was created to design websites with. All websites use HTML, no matter what software you use to build them. So if you use a website designer programmer, like Dreamweaver, it creates HTML for you.