In 2003, I needed to build a custom PHP extension for an email tool I was writing in PHP. I found the online documentation to be available but sparse and difficult to grok as it lacked context and examples.
After working through a trial extension and then the actual production extension that we needed, I decided to sit down and write a little guide for building PHP Extensions. In no time at all, my little guide exploded into a 120 page book. I decided to publish it on Lulu.com. Within weeks, Building Custom PHP Extensions was listed among the top sellers on Lulu.
Six years later, Building Custom PHP Extensions is still relevant in most regards, but it is obviously outdated. When I wrote it, PHP 5 was still a future release, so nothing about extension-building for PHP 5 is addressed in the book. I had planned to update it, but time hasn’t allowed. That’s why I’m re-releasing it under the Creative Commons Attribution-Share Alike 3.0 United States License.
It’s your turn now. Go ahead and take the book, make it better and use it in your projects. I look forward to seeing the results!
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