How does the PHP Web site make it unnecessary to display important information about the server when the file behind the URL does not exist?

How the PHP site does not allow the file behind the URL to exist, not to show important information about the server
For example, HTTP +/url/abc.asp If this file does not exist,
Displays the error interface as shown (picture one),

But in the error message, it will reveal information about the server, how not to let him appear this interface, or, when the error, direct prompt (Picture II)


------Optimal Solution--------------------
Specify the 404 error handling page

IIS is modified in IIS Manager
Apache errordocument 404/404.php in config file
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Unfortunately, the editor has reversed my picture. The top one is (picture two), the next one is (picture one).
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Thank you very much for your help.

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