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<!DOCTYPE html> <html> <body> <?php $str = "Hello"; echo sha1($str); if (sha1($str) == "f7ff9e8b7bb2e09b70935a5d785e0cc5d9d0abf0") { echo "<br>Hello world!"; exit; } ?> </body> </html>
f7ff9e8b7bb2e09b70935a5d785e0cc5d9d0abf0
Hello world!