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Marc Liyanage

Developer Larry Ullman is the director of digital media technology for DMC Insights, a consulting firm that specializes in information technology. He is also the author of several best-selling programming guides, including PHP for the World Wide Web: Visual QuickStart Guide and PHP and MySQL for Dynamic Web Sites: Visual QuickPro Guide. Marc Liyenage is a senior software engineer who's been using the C programming language for over 15 years, first on early home computers and PCs, and in the past 10 years on various UNIX/Linux systems, doing commercial Web application work and large-scale Internet/ISP systems design and implementation.

Larry Ullman

Larry Ullman is a writer, Web and software developer, trainer, instructor, speaker, and consultant. He has written numerous highly acclaimed books, which have sold over 300,000 copies worldwide in more than 20 languages. As his readers, students, and co-workers attest, Larry’s strength is converting the technical and arcane into something comprehensible and useful.