Wordpress- Custom columns for custom post types

Step 1. Adding custom columns-

The first step in creating custom columns, is to make these columns available on the edit posts page. WordPress has a variable filter hook for this called manage_edit-{$post_type}_columns for all post types. Since the name of our post type is movie, the name of the hook you’d use is manage_edit-movie_columns.

What we’ll do here is overwrite all of the default columns and set it up however we want. In this example, we’re using five columns:

1. cb: The checkbox column.

2. title: The post title column, which we’re changing to read “Movie.”

3. duration: The column for the duration of the movie (custom metadata).

4. family: The column for the movie family (custom taxonomy).

5. date: The default post date column.

Filtering these columns is fairly simple. You only need to return an array of key/value pairs. The key is the column name and the value is the output of the column header/label.

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add_filter( 'manage_edit-movie_columns', 'my_edit_movie_columns' ) ;   function my_edit_movie_columns( $columns ) {       $columns = array(         'cb' => '<input type="checkbox">',         'title' => __( 'Movie' ),         'duration' => __( 'Duration' ),         'family' => __( 'Family' ),         'date' => __( 'Date' )     );       return $columns; }

Step 2.Adding content to custom columns

The action hook in this case is manage_{$post_type}_posts_custom_column. Remember, the name of the post type is movie, so this hook becomes manage_movie_posts_custom_column.

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add_action( 'manage_movie_posts_custom_column', 'my_manage_movie_columns', 10, 2 );   function my_manage_movie_columns( $column, $post_id ) {     global $post;       switch( $column ) {           /* If displaying the 'duration' column. */         case 'duration' :               /* Get the post meta. */             $duration = get_post_meta( $post_id, 'duration', true );               /* If no duration is found, output a default message. */             if ( empty( $duration ) )                 echo __( 'Unknown' );               /* If there is a duration, append 'minutes' to the text string. */             else                 printf( __( '%s minutes' ), $duration );               break;           /* If displaying the 'family' column. */         case 'family' :               /* Get the familys for the post. */             $terms = get_the_terms( $post_id, 'family' );               /* If terms were found. */             if ( !empty( $terms ) ) {                   $out = array();                   /* Loop through each term, linking to the 'edit posts' page for the specific term. */                 foreach ( $terms as $term ) {                     $out[] = sprintf( '<a href="%s">%s</a>',                         esc_url( add_query_arg( array( 'post_type' => $post->post_type, 'family' => $term->slug ), 'edit.php' ) ),                         esc_html( sanitize_term_field( 'name', $term->name, $term->term_id, 'family', 'display' ) )                     );                 }                   /* Join the terms, separating them with a comma. */                 echo join( ', ', $out );             }               /* If no terms were found, output a default message. */             else {                 _e( 'No familys' );             }               break;           /* Just break out of the switch statement for everything else. */         default :             break;     } }

Step 3. (If you want to ) Making custom columns sortable

The first step is making the duration column sortable by filtering the manage_edit-{$post_type}_sortable_columns hook as shown in the following code.

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add_filter( 'manage_edit-movie_sortable_columns', 'my_movie_sortable_columns' );   function my_movie_sortable_columns( $columns ) {       $columns['duration'] = 'duration';       return $columns; }       /* Only run our customization on the 'edit.php' page in the admin. */ add_action( 'load-edit.php', 'my_edit_movie_load' );   function my_edit_movie_load() {     add_filter( 'request', 'my_sort_movies' ); }   /* Sorts the movies. */ function my_sort_movies( $vars ) {       /* Check if we're viewing the 'movie' post type. */     if ( isset( $vars['post_type'] ) && 'movie' == $vars['post_type'] ) {           /* Check if 'orderby' is set to 'duration'. */         if ( isset( $vars['orderby'] ) && 'duration' == $vars['orderby'] ) {               /* Merge the query vars with our custom variables. */             $vars = array_merge(                 $vars,                 array(                     'meta_key' => 'duration',                     'orderby' => 'meta_value_num'                 )             );         }     }       return $vars; }

Enjoy :)