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// Add the posts and pages columns filter. They can both use the same function. add_filter('manage_posts_columns', 'tcb_add_post_thumbnail_column', 5); add_filter('manage_pages_columns', 'tcb_add_post_thumbnail_column', 5); // Add the column function tcb_add_post_thumbnail_column($cols){ $cols['tcb_post_thumb'] = __('Featured'); return $cols; } // Hook into the posts an pages column managing. Sharing function callback again. add_action('manage_posts_custom_column', 'tcb_display_post_thumbnail_column', 5, 2); add_action('manage_pages_custom_column', 'tcb_display_post_thumbnail_column', 5, 2); // Grab featured-thumbnail size post thumbnail and display it. function tcb_display_post_thumbnail_column($col, $id){ switch($col){ case 'tcb_post_thumb': echo the_post_thumbnail( 'admin-list-thumb' ); else echo 'Not supported in theme'; break; } }
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