A VBScript equivalent of PHP’s str_rot13

Function str_rot13(str)

    Dim str_rotated : str_rotated = "
    Dim i,j,k

    For i = 1 to Len(str)
        j = Mid(str, i, 1)
        k = Asc(j)
        if k >= 97 and k =< 109 then
            k = k + 13 ' a ... m
        elseif k >= 110 and k =< 122 then
            k = k - 13 ' n ... z
        elseif k >= 65 and k =< 77 then
            k = k + 13 ' A ... M
        elseif k >= 78 and k =< 90 then
            k = k - 13 ' N ... Z
        end if

        str_rotated = str_rotated & Chr(k)
    Next

    str_rot13 = str_rotated

End Function

• Raw function on GitHub

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