**Base62** is a PHP class to convert a number to and from any base between 2-62.

There is no native function in PHP to convert upto base 62. The native function `base_convert`

converts numbers upto base 36, ie. using 0-9 and a-z. Since URLs are case sensitive, we can use additional character set of A-Z to make a number even shorter.

Most of the examples I found on the internet were converting a decimal to 62 and most of them were using BC Math functions to achieve that functionality. This script removes those restrictions and you can use it to convert to and from arbitrary bases between 2-64.

### Features and Optimizations

- It doesn’t use BC Math functions so works without the use of BC Math library.
- It uses the native
`base_convert`

functions when the base is below 36 for faster execution. - The output number is backward compatible with the native
`base_convert`

function. - Can be used to convert to and from arbitrary bases between 2-64.

### Usage

The usage is pretty simple. You have to include the class file in your code and call the following function.

$converted_num= Base62::convert($number, $from_base, $to_base);

### Example

echo Base62::convert(696952941); // 'Lalit' echo Base62::convert('Lalit', 62, 10); // 696952941

### Download (v0.1, 08 Dec, 2011)

The code is released under Apache License 2.0

fmod() is better than % for big int.

Arnaud!

Thank you very much for Base62!!!

ahh sorry

Lalit Patel, thank you ))