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Wordpress has already become a very popular free blog engine mostly thanks to the extensibility with the help of plug-ins. Since version 2.1 famous Wordpress Widgets were integrated. This mechanism allows to manage blocks in sidebar. In more difficult sites which are built with WP often there is a need of using different sidebars on different pages. Here come troubles with using widgets. The majority of widgets can be added only once. You can easily find articles on how to create widgets in the Internet. The main article is on Wordpress codex site (read wordpress widgets API article).

The article ends on section “Widgets - One or many ” with such words: “… Wordpress is doing the work for you to instantiate your Widget multiple times if you follow some rules.”. Actually in this article we want to describe these rules, because we can’t find them … read more