Fixed lenght for output? about shorturl HOT 1 CLOSED

Sure!

In order to guarantee an upper limit on the output, just put an upper limit on the input. With the integer types tinyint, smallint or int, you should not exceed 12 characters of output at all. If you need larger inputs, e.g. from bigint, your maximum input number for n characters of output is 51^n − 1. There's no other way to make the upper limit work.

Since what you want is 12 characters of output for every input, you need a lower limit as well.

The only way to make that work is by padding (e.g. on the left). Pad the output with a fixed character that is not in the alphabet of this library, up to your desired character length. If you need more variation and "randomness" in your output, consider using a set of multiple padding characters, neither of which may be in this library's alphabet. Choose the next padding character from set set randomly.

Hope that helps!

from shorturl.