Convert Decimal into Alphanumeric using php

Programing, Web Development Add comments

Jul 062009

A Problem occurred when I was writing a script for shortUrl redirection. That using 5 Digit decimal numbers can cover only 10⁵=100000 Urls but 5 digit alphanumeric (case sensitive) numbers are able to cover 62²=916132832. So it is very helpful to keep Urls short.

Example

Using Decimal http://surl.bz/0 to http://surl.bz/99999 only 100000 Urls In 5 Digit
Using alphanumeric http://surl.bz/0 to http://surl.bz/ZZZZZ 916132832 Urls that’s Great choice

You can use this script to convert any decimal number into case sensitive alphanumeric number. This script is useful to create short profile id for you registered user like http://www.yourdomain.com/profile/AS34G or any unique id while keeping Url short.

<?php
function alphanumeric($dec)
{
$an="0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
$id="";
$base=62;
while($dec>=$base)
{
$mod=$dec%$base;
$id=$an[$mod].$id;
$dec=$dec/$base;
}
$id=$an[$dec].$id;
return $id;
}
echo alphanumeric(123456);
?>

About sunny

sunny verma has written 66 post in this blog.

I am 26 years old php programmer from India.

Andy says:

April 22, 2011 at 10:14 pm

hi sunny, your code is nice! I want to ask you, how to retrieve the numbers that have been converted to alphanumeric. For example, I want to get the number “123456 ” which has been converted into “w7e”. thank you.
admin says:

April 23, 2011 at 11:55 am

@Andy
i will post that code soon
sunny says:

April 27, 2011 at 8:03 pm

Andy :

hi sunny, your code is nice! I want to ask you, how to retrieve the numbers that have been converted to alphanumeric. For example, I want to get the number “123456 ” which has been converted into “w7e”. thank you.

find your code here http://www.webnol.org/convert-alphanumeric-into-decimal-using-php/