PHP string encryption function from Discuz _php tutorial

A very strong cryptographic decryption function was found inside the discuz. The great thing about this function is that you can encrypt the restore string within a specified time, and the timeout cannot be restored.

So we can use this function to do a lot of purposes, such as: Single Sign-on token encryption transmission, temporary password, and so on.

Record here, convenient for later application.

 0) && substr ($result, ten, +) = = substr (MD5 ($result, $keyb), 0, (+)) {return substr ($result, +);} else {return ';}} else {return $KEYC. Str_replace (' = ', ' ', Base64_encode ($result));}}? >

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