Linkify Tags

Author:Scott Reilly
Version:2.1.2
First released:2009-06-12
Last update:2015-02-12
Compatibility:WP 2.8 – 4.1.5
Download:[ zip ]
Description:

Turn a list of tag IDs and/or slugs into a list of links to those tags.

Extended Description

The plugin provides a widget called “Linkify Tags” as well as a template tag, c2c_linkify_tags(), which allow you to easily specify tags to list and how to list them. Tags are specified by either ID or slug. See other parts of the documentation for example usage and capabilities.

Links: Plugin Homepage | Plugin Directory Page | Author Homepage

Find out more at the plugin’s WordPress Plugin Repository page.

Screenshots

Click to see full-size image.

  1. linkify-tags screenshot 1

    The plugin’s widget configuration.


Installation

  1. Unzip linkify-tags.zip inside the /wp-content/plugins/ directory for your site (or install via the built-in WordPress plugin installer)
  2. Activate the plugin through the ‘Plugins’ admin menu in WordPress
  3. Use the c2c_linkify_tags() template tag in one of your templates (be sure to pass it at least the first argument indicating what tag 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.

Template Tags

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

Functions

  • <?php c2c_linkify_tags( $tags, $before = '', $after = '', $between = ', ', $before_last = '', $none = '' ) ?>
    Displays links to each of any number of tags specified via tag IDs/slugs

Arguments

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

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

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

  • $between
    (optional) To appear between tags

  • $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 tags have been found. If blank, then the entire function doesn’t display anything

Examples

  • These are all valid calls:
<?php c2c_linkify_tags(43); ?>
<?php c2c_linkify_tags("43"); ?>
<?php c2c_linkify_tags("books"); ?>
<?php c2c_linkify_tags("43 92 102"); ?>
<?php c2c_linkify_tags("book movies programming-notes"); ?>
<?php c2c_linkify_tags("book 92 programming-notes"); ?>
<?php c2c_linkify_tags("43,92,102"); ?>
<?php c2c_linkify_tags("book,movies,programming-notes"); ?>
<?php c2c_linkify_tags("book,92,programming-notes"); ?>
<?php c2c_linkify_tags("43, 92, 102"); ?>
<?php c2c_linkify_tags("book, movies, programming-notes"); ?>
<?php c2c_linkify_tags("book, 92, programming-notes"); ?>
<?php c2c_linkify_tags(array(43,92,102)); ?>
<?php c2c_linkify_tags(array("43","92","102")); ?>
<?php c2c_linkify_tags(array("book","movies","programming-notes")); ?>
<?php c2c_linkify_tags(array("book",92,"programming-notes")); ?>
  • <?php c2c_linkify_tags("43 92"); ?>

Outputs something like:

<a href="http://yourblog.com/archives/tags/books">Books</a>, <a href="http://yourblog.com/archives/tags/movies">Movies</a>
  • <?php c2c_linkify_tags("43, 92", "<li>", "</li>", "</li><li>"); ?></ul>

Outputs something like:

<ul><li><a href="http://yourblog.com/archives/tags/books">Books</a></li><li><a href="http://yourblog.com/archives/tags/movies">Movies</a></li></ul>
  • <?php c2c_linkify_tags(""); // Assume you passed an empty string as the first value ?>

Displays nothing.

  • <?php c2c_linkify_tags("", "", "", "", "", "No related tags."); // Assume you passed an empty string as the first value ?>

Outputs:

No related tags.

Filters

The plugin exposes one action for hooking.

c2c_linkify_tags (action)

The ‘c2c_linkify_tags’ hook allows you to use an alternative approach to safely invoke c2c_linkify_tags() 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_tags()

Example:

Instead of:

<?php c2c_linkify_tags( "43, 92", 'Tags: ' ); ?>

Do:

<?php do_action( 'c2c_linkify_tags', "43, 92", 'Tags: ' ); ?>

Frequently Asked Questions

Q. What happens if I tell it to list something that I have mistyped, haven’t created yet, or have deleted?
A. If a given ID/slug doesn’t match up with an existing tag then that item is ignored without error.

Q. How do I get items to appear as a list (using HTML tags)?
A. 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 tags: </li><li>

Q. Does this plugin include unit tests?
A. Yes.


Release Log

2.1.2 (2015-02-11)

  • Note compatibility through WP 4.1+
  • Update copyright date (2015)

2.1.1 (2014-08-26)

  • Minor plugin header reformatting
  • Change documentation links to wp.org to be https
  • Note compatibility through WP 4.0+
  • Add plugin icon

2.1 (2013-12-20)

  • Validate tag is either int or string before handling
  • Add unit tests
  • Minor code tweaks (spacing, bracing)
  • Minor documentation tweaks
  • Note compatibility through WP 3.8+
  • Update copyright date (2014)
  • Change donate link
  • Add banner

2.0.4

  • Add check to prevent execution of code if file is directly accessed
  • Note compatibility through WP 3.5+
  • Update copyright date (2013)
  • Create repo’s WP.org assets directory
  • Move screenshot into repo’s assets directory

2.0.3

  • Re-license as GPLv2 or later (from X11)
  • Add ‘License’ and ‘License URI’ header tags to readme.txt and plugin file
  • Remove ending PHP close tag
  • Note compatibility through WP 3.4+

2.0.2

  • Note compatibility through WP 3.3+
  • Add link to plugin directory page to readme.txt
  • Update copyright date (2012)

2.0.1

  • Note compatibility through WP 3.2+
  • Minor code formatting changes (spacing)
  • Fix plugin homepage and author links in description in readme.txt

2.0

  • Add Linkify Tags widget
  • Rename linkify_tags() to c2c_linkify_tags() (but maintain a deprecated version for backwards compatibility)
  • Rename ‘linkify_tags’ action to ‘c2c_linkify_tags’ (but maintain support for backwards compatibility)
  • Add Template Tag, Screenshots, and Frequently Asked Questions sections to readme.txt
  • Add screenshot of widget admin
  • Changed Description in readme.txt
  • Note compatibility through WP 3.1+
  • Update copyright date (2011)

1.2

  • Add filter ‘linkify_tags’ to respond to the function of the same name so that users can use the do_action() notation for invoking template tags
  • Fix to prevent PHP notice
  • Wrap function in if(!function_exists()) check
  • Reverse order of implode() arguments
  • Remove docs from top of plugin file (all that and more are in readme.txt)
  • Note compatibility with WP 3.0+
  • Minor tweaks to code formatting (spacing)
  • Add Upgrade Notice section to readme.txt
  • Remove trailing whitespace

1.1

  • Add PHPDoc documentation
  • Add title attribute to link for each tag
  • Minor formatting tweaks
  • Note compatibility with WP 2.9+
  • Drop compatibility with WP older than 2.8
  • Update copyright date
  • Update readme.txt (including adding Changelog)

1.0

  • Initial release

Copyright & Disclaimer

Copyright © 2009-2015 by Scott Reilly (aka coffee2code)

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.


Discussion / Support

Have any questions, comments, or suggestions? Please provide them via the plugin’s WordPress.org support forum. I’ll do my best to reply in a timely fashion and help as best I can.

Unfortunately, I cannot provide guaranteed support, nor do I provide support via any other means.

Was this plugin useful useful to you? Consider giving it a rating. If you’re inclined to give it a poor rating, please first post to the support forum to give me a chance to address or explain the situation.