How did he know that?
Look at a person's PHP tutorial, he said there are more than 480 in the country with his framework, how he counted it? Is there a backdoor scan?
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There is also a possibility: he logs a notepad when his frame is installed, who installs it and writes it to Notepad, and then about how many IPs have installed his frame.
You said this I have seen, in the installation to the end of the time there is an automatic access to the official website of the jump, in fact, this jump is a cumulative. Many open source programs have this design.
Of course, extensive statistics such as download, such as search keywords, are can be used as an official reference data, in short, how much of this installation of things, how much water it
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The script has the author's URL address, you can use the "reverse link" statistical principle to statistics.
