Run my example in code igniter - php

Question

I have installed wamp and code igniter in Windows. Now instruction says
Usage:
$this->load->library('bubble');
Encode :
$this->bubble->encode('Pineapple');
Where to run this in Windows?
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/*
// Original
Bubble Babble Binary Data Encoding - PHP5 Library
See http://en.wikipedia.org/wiki/Bubble_Babble for details.
Copyright 2011 BohwaZ - http://bohwaz.net/
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
// For CodeIgniter
Bubble Babble for CodeIgniter, by Akira : http://www.akibatech.fr
Licence : WTFPL (http://en.wikipedia.org/wiki/WTFPL)
Using with CodeIgniter :
Copy Bubble.php in your library folder.
Then, you need to load this library in CodeIgniter :
$this->load->library('bubble');
Encode :
$this->bubble->encode('Pineapple');
// => xigak-nyryk-humil-bosek-sonax
Decode :
$this->bubble->decode('xigak-nyryk-humil-bosek-sonax');
// => Pineapple
Detect BubbleBabble's encoding :
$this->bubble->detect($string);
// => true of false
*/
class Bubble
{
protected $vowels = 'aeiouy';
protected $consonants = 'bcdfghklmnprstvzx';
public function encode($src)
{
$src = (string) $src;
$out = 'x';
$c = 1;
for ($i = 0;; $i += 2)
{
if ($i >= strlen($src))
{
$out .= $this->vowels[$c%6] . $this->consonants[16] . $this->vowels[$c/6];
break;
}
$byte1 = ord($src[$i]);
$out .= $this->vowels[((($byte1>>6)&3)+$c)%6];
$out .= $this->consonants[($byte1>>2)&15];
$out .= $this->vowels[(($byte1&3)+($c/6))%6];
if ($i+1 >= strlen($src))
break;
$byte2 = ord($src[$i + 1]);
$out .= $this->consonants[($byte2>>4)&15];
$out .= '-';
$out .= $this->consonants[$byte2&15];
$c = ($c * 5 + $byte1 * 7 + $byte2) % 36;
}
$out .= 'x';
return $out;
}
protected function _decode2WayByte($a1, $a2, $offset)
{
if ($a1 > 16)
show_error("Corrupt string at offset ".$offset);
if ($a2 > 16)
show_error("Corrupt string at offset ".($offset+2));
return ($a1 << 4) | $a2;
}
protected function _decode3WayByte($a1, $a2, $a3, $offset, $c)
{
$high2 = ($a1 - ($c%6) + 6) % 6;
if ($high2 >= 4)
show_error("Corrupt string at offset ".$offset);
if ($a2 > 16)
show_error("Corrupt string at offset ".($offset+1));
$mid4 = $a2;
$low2 = ($a3 - ($c/6%6) + 6) % 6;
if ($low2 >= 4)
show_error("Corrupt string at offset ".($offset+2));
return $high2<<6 | $mid4<<2 | $low2;
}
protected function _decodeTuple($src, $pos)
{
$tuple = array(
strpos($this->vowels, $src[0]),
strpos($this->consonants, $src[1]),
strpos($this->vowels, $src[2])
);
if (isset($src[3]))
{
$tuple[] = strpos($this->consonants, $src[3]);
$tuple[] = '-';
$tuple[] = strpos($this->consonants, $src[5]);
}
return $tuple;
}
public function decode($src)
{
$src = (string) $src;
$c = 1;
if ($src[0] != 'x')
show_error("Corrupt string at offset 0: must begin with a 'x'");
if (substr($src, -1) != 'x')
show_error("Corrupt string at offset 0: must end with a 'x'");
if (strlen($src) != 5 && strlen($src)%6 != 5)
show_error("Corrupt string at offset 0: wrong length");
$src = str_split(substr($src, 1, -1), 6);
$last_tuple = count($src) - 1;
$out = '';
foreach ($src as $k=>$tuple)
{
$pos = $k * 6;
$tuple = $this->_decodeTuple($tuple, $pos);
if ($k == $last_tuple)
{
if ($tuple[1] == 16)
{
if ($tuple[0] != $c % 6)
show_error("Corrupt string at offset $pos (checksum)");
if ($tuple[2] != (int)($c / 6))
show_error("Corrupt string at offset ".($pos+2)." (checksum)");
}
else
{
$byte = $this->_decode3WayByte($tuple[0], $tuple[1], $tuple[2], $pos, $c);
$out .= chr($byte);
}
}
else
{
$byte1 = $this->_decode3WayByte($tuple[0], $tuple[1], $tuple[2], $pos, $c);
$byte2 = $this->_decode2WayByte($tuple[3], $tuple[5], $pos);
$out .= chr($byte1);
$out .= chr($byte2);
$c = ($c * 5 + $byte1 * 7 + $byte2) % 36;
}
}
return $out;
}
public function detect($string)
{
if ($string[0] != 'x' || substr($string, -1) != 'x')
return false;
if (strlen($string) != 5 && strlen($string)%6 != 5)
return false;
if (!preg_match('/^(['.$this->consonants.$this->vowels.']{5})(-(?1))*$/', $string))
return false;
return true;
}
}
?>