Linkify Categories

Description

The plugin provides a widget called “Linkify Catagories” as well as a template tag, c2c_linkify_categories(), which allow you to easily specify categories to list and how to list them. Categories are specified by either ID or slug. See other parts of the documentation for example usage and capabilities.

Links: Plugin Homepage | Plugin Directory Page | GitHub | Author Homepage

Template Tags

The plugin provides one template tag for use in your theme templates, functions.php, or plugins.

Functions

  • <?php c2c_linkify_categories( $categories, $before = '', $after = '', $between = ', ', $before_last = '', $none = '' ) ?>
    Displays links to each of any number of categories specified via category IDs/slugs

Arguments

  • $categories
    A single category ID/slug, or multiple category IDs/slugs defined via an array, or multiple categories IDs/slugs defined via a comma-separated and/or space-separated string

  • $before
    (optional) To appear before the entire category listing (if categories exist or if ‘none’ setting is specified)

  • $after
    (optional) To appear after the entire category listing (if categories exist or if ‘none’ setting is specified)

  • $between
    (optional) To appear between categories

  • $before_last
    (optional) To appear between the second-to-last and last element, if not specified, ‘between’ value is used

  • $none
    (optional) To appear when no categories have been found. If blank, then the entire function doesn’t display anything

Examples

  • These are all valid calls:

  • <?php c2c_linkify_categories("43 92"); ?>

Outputs something like:

 <a href="http://yourblog.com/category/books">Books</a>, <a href="http://yourblog.com/category/movies">Movies</a>
  • <ul><?php c2c_linkify_categories("43, 92", "<li>", "</li>", "</li><li>"); ?></ul>

Outputs something like:

<ul><li><a href="http://yourblog.com/category/books">Books</a></li><li><a href="http://yourblog.com/category/movies">Movies</a></li></ul>
  • <?php c2c_linkify_categories(""); // Assume you passed an empty string as the first value ?>

Displays nothing.

  • <?php c2c_linkify_categories("", "", "", "", "", "No related categories."); // Assume you passed an empty string as the first value ?>

Outputs:

No related categories.<h3>Hooks</h3>

The plugin exposes one action for hooking.

c2c_linkify_categories (action)

The ‘c2c_linkify_categories’ hook allows you to use an alternative approach to safely invoke c2c_linkify_categories() in such a way that if the plugin were to be deactivated or deleted, then your calls to the function won’t cause errors in your site.

Arguments:

  • same as for c2c_linkify_categories()

Example:

Instead of:

<?php c2c_linkify_categories( "43, 92", 'Categories: ' ); ?>

Do:

<?php do_action( 'c2c_linkify_categories', "43, 92", 'Categories: ' ); ?>

Screenshots

  • The plugin's widget configuration.

Installation

  1. Install via the built-in WordPress plugin installer. Or download and unzip linkify-categories.zip inside the plugins directory for your site (typically wp-content/plugins/)
  2. Activate the plugin through the ‘Plugins’ admin menu in WordPress
  3. Use provided widget or the c2c_linkify_categories() template tag in one of your templates (be sure to pass it at least the first argument indicating what category IDs and/or slugs to linkify — the argument can be an array, a space-separate list, or a comma-separated list). Other optional arguments are available to customize the output.
  4. Optional: Use the “Linkify Categories” widget in one of the sidebars provided by your theme.

FAQ

What happens if I tell it to list something that I have mistyped, haven’t created yet, or have deleted?

If a given ID/slug doesn’t match up with an existing category then that item is ignored without error.

How do I get items to appear as a list (using HTML tags)?

Whether you use the template tag or the widget, specify the following information for the appropriate fields/arguments:

Before text: <ul><li> (or <ol><li>)
After text: </li></ul> (or </li></ol>)
Between categories: </li><li>

Does this plugin include unit tests?

Yes.

Contributors & Developers

“Linkify Categories” is open source software. The following people have contributed to this plugin.

Contributors

Translate “Linkify Categories” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.

Changelog

2.2.3 (2019-11-26)

  • New: Add CHANGELOG.md and move all but most recent changelog entries into it
  • New: Add optional step to installation instructions to note availability of the widget
  • Change: Update unit test install script and bootstrap to use latest WP unit test repo
  • Change: Note compatibility through WP 5.3+
  • Change: Add link to plugin’s page in Plugin Directory to README.md
  • Change: Update copyright date (2020)
  • Change: Split paragraph in README.md’s “Support” section into two

2.2.2 (2019-02-02)

  • New: Add README.md
  • Change: Escape text used in markup attributes (hardening)
  • Change: Add GitHub link to readme
  • Change: Unit tests: Minor whitespace tweaks to bootstrap
  • Change: Rename readme.txt section from ‘Filters’ to ‘Hooks’
  • Change: Modify formatting of hook name in readme to prevent being uppercased when shown in the Plugin Directory
  • Change: Note compatibility through WP 5.1+
  • Change: Update copyright date (2019)
  • Change: Update License URI to be HTTPS

2.2.1 (2017-02-25)

  • Fix: Fix unit tests by not declaring test class variable as static
  • Change: Update unit test bootstrap
    • Default WP_TESTS_DIR to /tmp/wordpress-tests-lib rather than erroring out if not defined via environment variable
    • Enable more error output for unit tests
  • Change: Note compatibility through WP 4.7+
  • Change: Minor readme.txt content and formatting tweaks
  • Change: Update copyright date (2017)

Full changelog is available in CHANGELOG.md.