It's easy to include Composer packages in your concrete5 package.
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PHP provides both built-in support and external libraries for localizing managing translated content. But what about localized data that isn't a language? Things like working with dates, numbers and currency? Use the Punic CLDR library to manage these types of content.
Learn how I've setup my page types and page templates for andrewembler.com
Would you like to store database schemas in a portable, agnostic way? Use Doctrine XML – an XML format for describing databases in XML using Doctrine conventions.