PHP ansi to utf8 and vice versa - php

Question

I just want to accomplish something where I want to convert strings from ansi to utf8 and vice versa.
example: to_ansi(1234)
expected result: NLKJ
example: to_utf8(NLKJ)
expected result: 1234
functions I currently have are:
function to_ansi($str)
{
$newString = "";
$reversedString = strrev($str);
for($i=0; $i < strlen($reversedString); $i++ ) {
$newString .= iconv(mb_detect_encoding(), 'UTF-8', chr(ord($reversedString[$i]) * 1.5));
}
return $newString;
}
function to_utf8($str)
{
$newString = "";
$reversedString = strrev($str);
for($i=0; $i < strlen($reversedString); $i++ ) {
$newString .= iconv(mb_detect_encoding(), 'UTF-8', chr(ord($reversedString[$i]) / 1.5));
}
return $newString;
}
usnig those functions above I get
example: to_ansi(1234)
result: NLKI
example: to_utf8(NLKJ)
result: 1224
actually I'm just interpreting vbs to PHP and the original functions are:
Function ToAnsi(ByVal strPassword As String) As String
Dim strLetter As String
Dim strRevPass As String
Dim strNewPass As String
strRevPass = strReverse(strPassword)
strNewPass = ""
For a = 1 To Len(strRevPass)
strLetter = Mid$(strRevPass, a, 1)
strNewPass = strNewPass & Chr((Asc(strLetter) * 1.5))
Next a
Text2.Text = strNewPass
End Function
Function ToUTF8(ByVal strPassword As String)
Dim strLetter As String
Dim strRevPass As String
Dim strNewPass As String
strRevPass = strReverse(strPassword)
strNewPass = ""
For a = 1 To Len(strRevPass)
strLetter = Mid$(strRevPass, a, 1)
strNewPass = strNewPass & Chr(Asc(strLetter) / 1.5)
Next a
txtText3.Text = strNewPass
End Function

Answer 1

Why do you think that 1234 in ANSI should NLKJ in UTF-8?
The reason of your problem might be a rounding error. You're multiplying and dividing by 1.5. For instance the letter 'y' (ASCII 122) divided by 1.5 is 80 2/3, which is treated as 81 (there are no fractions in character codes). Then back: 81 * 1.5 = 121.5 which is treated as 122, resulting in a 'z'.
So it's hard to grasp what the meaning of this code is. It certainly isn't a regular ANSI to UTF-8 conversion.
It seems to do some password hashing/encoding, but in a way that is very insecure. It's just a very simple encoding algorithm that can be very easily decoded as well, apart from the fact that it is inherently broken, and mangles your data beyond repair.