This action is called whenever a value for a custom column should be output for a custom post type. Combined with the manage_${post_type}_posts_columns filter, this allows you to add or remove (unset) custom columns to a list of custom post types.
For built-in post types and multiple custom types, use manage_posts_custom_column.
A registered action function is passed the following parameters.
When passing this function on terms and taxonomies, a third parameter is added.
Suppose you have a 'book' custom post type and you want to add the publisher and book author in the edit page but remove the post author.
add_filter( 'manage_book_posts_columns', 'set_custom_edit_book_columns' );
add_action( 'manage_book_posts_custom_column' , 'custom_book_column', 10, 2 );
function set_custom_edit_book_columns($columns) {
unset( $columns['author'] );
$columns['book_author'] = __( 'Author', 'your_text_domain' );
$columns['publisher'] = __( 'Publisher', 'your_text_domain' );
return $columns;
}
function custom_book_column( $column, $post_id ) {
switch ( $column ) {
case 'book_author' :
$terms = get_the_term_list( $post_id , 'book_author' , '' , ',' , '' );
if ( is_string( $terms ) )
echo $terms;
else
_e( 'Unable to get author(s)', 'your_text_domain' );
break;
case 'publisher' :
echo get_post_meta( $post_id , 'publisher' , true );
break;
}
}
manage_{$post_type}_posts_custom_column is located in wp-admin/includes/class-wp-posts-list-table.php.