if you stumble-upon a URL somewhere that contains the string, php, you can be 100% certain that what the web-server is doing is executing that PHP program

This is so very wrong.

It it were a file suffix indeed and the webserver configured to execute those pages with PHP, then that would work.
That is a somewhat common thing, but not ubiquitous.

Don't be so certain, as there are at least three biggish companies where ".php" web pages are run with perl and a templating engine.

Cheers, Sören

Créateur des bugs mobiles - let loose once, run everywhere.
(hooked on the Perl Programming language)

In reply to Re^2: How CGI works by Happy-the-monk
in thread How CGI works by Sarat1729

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