README

A simple and faithful implementation of Douglas Crockford's Base32 encoding in PHP as specified in https://www.crockford.com/base32.html. Supports encoding and decoding of up to 60-bit integers.

Usage

Encode and decode integers from 0 up to 1152921504606846975(largest 60-bit). The full 60-65-bit range is not fully supported in a 64-bit system. The same applies to 30-35-bit range on a 32-bit system.

use Czarpino\PhpCrockford32\CrockfordBase32;

$crockfordBase32 = new CrockfordBase32();
$encoded = $crockfordBase32->encode(1152921504606846975); // ZZZZZZZZZZZZ
$decoded = $crockfordBase32->decode('ZZZZZZZZZZZZ');      // 1152921504606846975

Encoding with Check Symbol

use Czarpino\PhpCrockford32\CrockfordBase32;

$crockfordBase32 = new CrockfordBase32();
$encoded = $crockfordBase32->encode(1152921504606846975);
$checksum = $crockfordBase32->checksum($number);
$encodedWithCheckSum = $encoded . $checksum;

Decoding with Check Symbol

use Czarpino\PhpCrockford32\CrockfordBase32;

$encodedWithCheckSum = 'ZZZZZZZZZZZZ9';
$encoded = substr($encodedWithCheckSum, 0, -1);
$checksum = substr($encodedWithCheckSum, -1);

$crockfordBase32 = new CrockfordBase32();
$decoded = $crockfordBase32->decode($encoded);
$isValid = $checksum === $crockfordBase32->checksum($decoded);

Installation

composer require czarpino/php-crockford32