--- /dev/null
+[![Latest Stable Version]](https://packagist.org/packages/wikimedia/base-convert) [![License]](https://packagist.org/packages/wikimedia/base-convert)
+
+Improved base_convert for PHP
+=============================
+
+PHP's `base_convert` function does not handle large numbers well. This
+library does, and can also optionally zero-pad to a minimum column width.
+
+It is a drop-in replacement for base_convert, supporting base 2 through 36,
+and has additional features for padding and case.
+
+The gmp and bcmath extensions are optionally used for improved performance.
+
+Additional documentation about the library can be found on
+[MediaWiki.org](https://www.mediawiki.org/wiki/base_convert).
+
+
+Usage
+-----
+
+ // Using padding, outputs 01010
+ \Wikimedia\base_convert('a', '36', '2', '5')
+
+
+Running tests
+-------------
+
+ composer install --prefer-dist
+ composer test
+
+
+History
+-------
+
+This library was first introduced in [MediaWiki 1.7][] ([r14777][]),
+and overhauled in [MediaWiki 1.21][] ([9b9daadc46][]). It was split
+out of the MediaWiki codebase and published as an independent library
+during the [MediaWiki 1.27][] development cycle.
+
+
+---
+[MediaWiki 1.7]: https://www.mediawiki.org/wiki/MediaWiki_1.7
+[r14777]: https://www.mediawiki.org/wiki/Special:Code/MediaWiki/14777
+[MediaWiki 1.21]: https://www.mediawiki.org/wiki/MediaWiki_1.21
+[9b9daadc46]: https://gerrit.wikimedia.org/r/40552
+[MediaWiki 1.27]: https://www.mediawiki.org/wiki/MediaWiki_1.27
+[Latest Stable Version]: https://poser.pugx.org/wikimedia/base-convert/v/stable.svg
+[License]: https://poser.pugx.org/wikimedia/base-convert/license.svg