Carlo is a freelance front-end designer and developer. In the last years he’s been writing for ioProgrammo, an Italian printed computer magazine, and HTML.it, a popular design and development Italian website.
When he writes articles and tutorials, Carlo mainly deals with web standards, but when he plays with websites his best workmate is WordPress.
This article covers both a theoretical introduction to handling user requests and a concrete application of that theory, particularly, building an advanced search system.
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In WordPress, a navigation menu, a list of categories or pages, and a list of comments all share one common characteristic: They are the visual representation of tree-like data structures. This means that a relationship of superordination and subordination exists among the elements of each data tree.
There will be elements that are parents of other elements and, conversely, elements that are children of other elements. A reply to a comment depends logically on its parent, in the same way that a submenu item depends logically on the root element of the tree (or subtree).
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A lot of tools enable us to distribute a website’s content, but when we need to promptly reach a target group, an email notification system might be the best option. If your website is not frequently updated, you could notify all subscribers each time a post is published. However, if it’s updated frequently or it covers several topics, you could filter subscribers before mailing them.
If you opt for the latter, you could set up a user meta field that stores a bit of information to identify the subscribers to be notified. The same bit of information would label the posts you’re publishing. Depending on the website’s architecture, you could store the metadata in a category, a tag, a custom taxonomy or a custom field. In this article we’ll show you how to let your website’s subscribers decide when they want notifications, and linked to a particular location.
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