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Add columns to admin page for a Custom Post Type

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  1. // Change the columns for the edit CPT screen
  2. function change_columns( $cols ) {
  3.   $cols = array(
  4.     'cb'       => '<input type="checkbox" />',
  5.     'url'      => __( 'URL',      'trans' ),
  6.     'referrer' => __( 'Referrer', 'trans' ),
  7.     'host'     => __( 'Host', 'trans' ),
  8.   );
  9.   return $cols;
  10. }
  11. add_filter( "manage_<CPT>_posts_columns", "change_columns" );
  12.  
  13.  
  14. function custom_columns( $column, $post_id ) {
  15.   switch ( $column ) {
  16.     case "url":
  17.       $url = get_post_meta( $post_id, 'url', true);
  18.       echo '<a href="' . $url . '">' . $url. '</a>';
  19.       break;
  20.     case "referrer":
  21.       $refer = get_post_meta( $post_id, 'referrer', true);
  22.       echo '<a href="' . $refer . '">' . $refer. '</a>';
  23.       break;
  24.     case "host":
  25.       echo get_post_meta( $post_id, 'host', true);
  26.       break;
  27.   }
  28. }
  29.  
  30. add_action( "manage_posts_custom_column", "custom_columns", 10, 2 );
  31.  
  32. // Make these columns sortable
  33. function sortable_columns() {
  34.   return array(
  35.     'url'      => 'url',
  36.     'referrer' => 'referrer',
  37.     'host'     => 'host'
  38.   );
  39. }
  40.  
  41. add_filter( "manage_edit-<CPT>_sortable_columns", "sortable_columns" );
  42.  
  43. // Filter the request to just give posts for the given taxonomy, if applicable.
  44. function taxonomy_filter_restrict_manage_posts() {
  45.     global $typenow;
  46.  
  47.     // If you only want this to work for your specific post type,
  48.     // check for that $type here and then return.
  49.     // This function, if unmodified, will add the dropdown for each
  50.     // post type / taxonomy combination.
  51.  
  52.     $post_types = get_post_types( array( '_builtin' => false ) );
  53.  
  54.     if ( in_array( $typenow, $post_types ) ) {
  55.     	$filters = get_object_taxonomies( $typenow );
  56.  
  57.         foreach ( $filters as $tax_slug ) {
  58.             $tax_obj = get_taxonomy( $tax_slug );
  59.             wp_dropdown_categories( array(
  60.                 'show_option_all' => __('Show All '.$tax_obj->label ),
  61.                 'taxonomy' 	  => $tax_slug,
  62.                 'name' 		  => $tax_obj->name,
  63.                 'orderby' 	  => 'name',
  64.                 'selected' 	  => $_GET[$tax_slug],
  65.                 'hierarchical' 	  => $tax_obj->hierarchical,
  66.                 'show_count' 	  => false,
  67.                 'hide_empty' 	  => true
  68.             ) );
  69.         }
  70.     }
  71. }
  72.  
  73. add_action( 'restrict_manage_posts', 'taxonomy_filter_restrict_manage_posts' );

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