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?
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asked Dec 28, 2012 at 11:30
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4 Answers
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Dave 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:
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:
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.
