Jason Lengstorf Books

PHP for absolute beginners

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Get started in web development using PHP. Even if you've never programmed before, author Jason Lengstorf introduces you to PHP by building a PHP-based blogging site while covering all the good codi...

PHP for Absolute Beginners

By Jason Lengstorf

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Realtime Web Apps

By Phil Leggetter, Jason Lengstorf, Alex Newman

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PHP for Absolute Beginners

By Thomas Blom Hansen, Jason Lengstorf

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PHP for Absolute Beginners

By Jason Lengstorf

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Pro PHP and jQuery

By Jason Lengstorf

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Pro PHP and jQuery

By Jason Lengstorf

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Pro PHP and JQuery

By Jason Lengstorf, Keith Wald

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PHP 8 for Absolute Beginners

By Thomas Blom Hansen, Jason Lengstorf, Steve Prettyman

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.