I want to have a link to create a new post that sets the category also.
I have tried wp-admin/post-new.php?post_category=12 and wp-admin/post-new.php?cat=12, but neither worked. I also tried using the name rather than the id of the category; which also had no affect.
How do I create a link to a new post with a default category?
I want to have a link to create a new post that sets the category also.
I have tried wp-admin/post-new.php?post_category=12 and wp-admin/post-new.php?cat=12, but neither worked. I also tried using the name rather than the id of the category; which also had no affect.
How do I create a link to a new post with a default category?
Share Improve this question asked Dec 28, 2012 at 11:30 A TA T 2263 silver badges13 bronze badges4 Answers
Reset to default 5Dave James Miller over at GitHub nailed this one for me. None of the work is from me, I'm just posting his code wrapped into a plguin since it works perfectly as advertised:
<?php
/**
* Plugin Name: Set default category from url parameter
* Plugin URI: https://gist.github/davejamesmiller/1966543
* Description: enables you to setup new post links with the post_title, category and tags in the url: <code><a href="<?= esc_attr(admin_url('post-new.php?post_title=Default+title&category=category1&tags=tag1,tag2')) ?>">New post</a></code>
* Version: 0.0.1
* Author: davejamesmiller
* Author URI: https://gist.github/davejamesmiller
*/
// I used this code to automatically set the default post title, category and
// tags for a new WordPress post based on which link was clicked. It could also
// be tweaked to hard-code the values instead of using request parameters.
add_filter('wp_get_object_terms', function($terms, $object_ids, $taxonomies, $args)
{
if (!$terms && basename($_SERVER['PHP_SELF']) == 'post-new.php') {
// Category - note: only 1 category is supported currently
if ($taxonomies == "'category'" && isset($_REQUEST['category'])) {
$id = get_cat_id($_REQUEST['category']);
if ($id) {
return array($id);
}
}
// Tags
if ($taxonomies == "'post_tag'" && isset($_REQUEST['tags'])) {
$tags = $_REQUEST['tags'];
$tags = is_array($tags) ? $tags : explode( ',', trim($tags, " \n\t\r\0\x0B,") );
$term_ids = array();
foreach ($tags as $term) {
if ( !$term_info = term_exists($term, 'post_tag') ) {
// Skip if a non-existent term ID is passed.
if ( is_int($term) )
continue;
$term_info = wp_insert_term($term, 'post_tag');
}
$term_ids[] = $term_info['term_id'];
}
return $term_ids;
}
}
return $terms;
}, 10, 4);
Hook into wp_insert_post, test the post status for auto-draft, and the URL for a GET parameter.
But first we need a helper function to get and sanitize the GET parameter:
/**
* Set default category.
*
* @wp-hook pre_option_default_category
* @return string Category slug
*/
function t5_get_default_cat_by_url()
{
if ( ! isset( $_GET['post_cat'] ) )
return FALSE;
return array_map( 'sanitize_title', explode( ',', $_GET['post_cat'] ) );
}
Now the auto-draft handler:
add_action( 'wp_insert_post', 't5_draft_category', 10, 2 );
/**
* Add category by URL parameter to auto-drafts.
*
* @wp-hook wp_insert_post
* @param int $post_ID
* @param object $post
* @return WP_Error|array An error object or term ID array.
*/
function t5_draft_category( $post_ID, $post )
{
if ( ! $cat = t5_get_default_cat_by_url()
or 'auto-draft' !== $post->post_status )
return;
// return value will be used in unit tests only.
return wp_set_object_terms( $post_ID, $cat, 'category' );
}
This works only if get_default_post_to_edit() was called with the second parameter $create_in_db set to TRUE. To catch the other case you have to filter the option default_category:
add_filter( 'pre_option_default_category', 't5_get_default_cat_by_url' );
Now you can use the parameter post_cat to pass a comma separated list of category slugs:
See also:
- Template plugin for blog posts?
- Open Wordpress 'Add New Post' admin page with parameters set via $_GET
- Force category choice before creating new post?
I think you can go about the default option default_category and filter option_default_category this, if the url have a param for the category, like this example source. Use it as plugin, test it. Was write from scratch and not tested.
The url param is post_cat and you can set the category, like this url:
/wp-admin/post-new.php?post_cat=categoryname
<?php
/**
* Plugin Name: .my Test
* Plugin URI: http://bueltge.de/
* Description:
* Version: 0.0.1
* Author: Frank Bültge
* Author URI: http://bueltge.de/
*/
class Set_Default_Cat_From_Url_Param {
protected static $classobj = NULL;
public static function init() {
NULL === self::$classobj and self::$classobj = new self();
return self::$classobj;
}
function __construct() {
if ( isset( $_GET['post_cat'] ) )
add_filter( 'option_default_category', array( $this, 'get_category' ) );
}
function get_category( $category ) {
if ( isset( $_GET['post_cat'] ) )
$category = get_cat_ID( esc_attr( $_GET['post_cat'] ) );
return $category;
}
}
add_action( 'load-post-new.php', array( 'Set_Default_Cat_From_Url_Param', 'init' ) );
I realize this has already been answered, but I wanted to add my own take. I've added it to a gist here https://gist.github/malcalevak/ba05b4fbed0c6e33ac8c18c1451bd857
To save you the hassle, though, here's the code:
function set_category () {
global $post;
//Check for a category parameter in our URL, and sanitize it as a string
$category_slug = filter_input(INPUT_GET, 'category', FILTER_SANITIZE_STRING, array("options" => array("default" => 0)));
//If we've got a category by that name, set the post terms for it
if ( $category = get_category_by_slug($category_slug) ) {
wp_set_post_terms( $post->ID, array($category->term_id), 'category' );
}
}
//hook it into our post-new.php specific action hook
add_action( 'admin_head-post-new.php', 'set_category', 10, 1 );
Similar to all the others, you'd trigger it via /wp-admin/post-new.php?category=categoryname
FYI, if you're using Advanced Custom Fields, like @Aphire, this WILL work.