Custom Field Taxonomies

Custom fields are great for storing various meta data about a post. However, if you routinely need to display posts that have a certain custom field value, you should consider switching to a custom taxonomy, which is better suited for grouping posts.

With this simple plugin, you can convert all custom fields with a certain key to terms in a certain taxonomy, while maintaining the post association.

Note: If you’re looking for the old version, see Custom Query Fields

Links: Plugin News | Author’s Site

1. Unzip the archive and put the folder into your plugins folder (/wp-content/plugins/).
2. Activate the plugin from the Plugins admin menu.
3. Go to Tools -> CF Taxonomies

Error on activation: “Parse error: syntax error, unexpected…”

Make sure your host is running PHP 5. The only foolproof way to do this is to add this line to wp-config.php (after the opening <?php tag):

var_dump(PHP_VERSION);

1. 

   The utility

2.0.3

• fixed severe bug in custom field dropdown
• updated scbFramework

2.0.2

• more detailed error messages
• convert to any taxonomy with ‘show_ui’ => true

2.0.1

• fixed error with existing terms
• proper handling of custom fields with ‘,’ in them
• more info

2.0

• new direction: convert custom fields to taxonomy terms
• more info

1.4

• added support for ranges: ?price-min=100&price-max=300
• security enhancements
• more info

1.3.4

• fixed “Remove duplicates” button
• dropped support for WordPress older than 2.8

1.3.3

• ajax-ed admin page

1.3.2

• fixed meta_cloud() args

1.3.1

• fixed “Save taxonomies” button
• added two hooks

1.3

• added AND, OR queries
• fixed compatibility with Smarter Navigation
• more info

1.2

• revamped Admin Page
• option to sort posts by key=value order
• doesn’t mess with other loops except the main WP loop
• more info

1.1

• wildcard support
• option to show posts that don’t match all key=value pairs
• more info

1.0

• several bugfixes and enhancements
• more info

0.9

• meta search box
• more info

0.8

• custom field management
• more info

0.7

• multiple key=value pairs
• more info

0.6

• relative URLs
• more info

0.5

• initial release
• more info