Hashcash implementation in PHP.

v1.8.0 2017-06-15 08:00 UTC


Pure PHP implementation of Hashcash 1.

Project Outlines

The project outlines as described in my blog post about Open Source Software Collaboration.

  • The main purpose of this software is to implement Hashcash using pure PHP.
  • The features should not go beyond the features and functions the original implementation of Hashcash is providing. So the feature-set is kind of restricted what could be possible in the future. But still, feel free to request features.


The preferred method of installation is via Packagist and Composer. Run the following command to install the package and add it as a requirement to composer.json:

composer.phar require thefox/hashcash


See examples.php for more examples.

require 'vendor/autoload.php';
use TheFox\Pow\Hashcash;
$stamp = Hashcash::newInstance(20, '')->mint();
print "hashcash stamp: '".$stamp."'\n";

Alternative Usage

require 'vendor/autoload.php';
use TheFox\Pow\Hashcash;
$hashcash = new Hashcash(20, '');
print "hashcash stamp: '".$hashcash->mint()."'\n";



You're welcome to contribute to this project. Fork this project at You should read GitHub's How to Fork a Repo.


Copyright (C) 2014 Christian Mayer

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 (at your option) 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