Implement Atwood's Equipping our ASCII armor in PHP

Question

I'm trying to implement in PHP something similar to Jeff Atwood's Equipping our ASCII armor. Here's C# Implementation of ASCII85.

Here's PHP Implementation of ASCII85

Here's how I convert the string to byte array:

$byteArr = str_split($uid);
foreach ($byteArr as $key=>$val) {
     $byteArr[$key] = ord($val); 
}

And what? now :) How to encode this byte array using ASCII 85 to get shorter UID?

the link to the PHP implementation is the same as the C# one. — adrien, May 16 '12 at 13:22
possible duplicate of ["A shorter UUID, ASCII85 with PHP"](http://stackoverflow.com/questions/10325000/a-shorter-uuid-ascii85-with-php) ? — David Cary, Aug 28 '12 at 03:04

score 1 · Answer 1 · answered May 16 '12 at 13:27

1

It depends on the PHP implementation (your link is not working).

If you use this one, then the code is easy:

<?php
include("ascii85.php"); 

$a = new ASCII85();
$uid = "YOUR-UID-AS-A-STRING"; 

$en = $a->encode($uid); 
$de = $a->decode($en); 

echo $en."\n\n".$de;

answered May 16 '12 at 13:27

adrien

4,399
26
26

This encodes and decodes, bud `$en` is longer than `$uid`, and the point is to make it shorter. – Sfisioza May 16 '12 at 19:50
Could you show us an example og uid and the generated ascii85? – adrien May 17 '12 at 08:04
`$in = 22da5537-de54-459d-9b33-f40f2101143b`, `$out = <~1,` – Sfisioza May 18 '12 at 06:28

Implement Atwood's Equipping our ASCII armor in PHP

1 Answers1