how to assign a status/mark to post?

1 comment

1. You can create your own meta box with a checkbox and only select posts that where checked:

   Add metabox code

   /* Define the custom box */
   add_action( 'add_meta_boxes', 'my_slider_add_custom_box' );
   
   /* Do something with the data entered */
   add_action( 'save_post', 'my_slider_save_postdata' );
   
   /* Adds a box to the main column on the Post and Page edit screens */
   function my_slider_add_custom_box() {
       add_meta_box( 
           'my_slider_sectionid',
           __( 'my slider', 'my_slider_textdomain' ),
           'my_slider_inner_custom_box',
           'post' 
       );
   }
   
   /* Prints the box content */
   function my_slider_inner_custom_box() {
       global $post;
       // Use nonce for verification
       wp_nonce_field( plugin_basename( __FILE__ ), 'my_slider_noncename' );
       $saved = get_post_meta($post->ID,'my_slider_field',true);
       // The actual fields for data entry
       echo '<label for="my_slider_field">';
       _e("Check the box if you want this post to show in the slider", 'myplugin_textdomain' );
       echo '</label> ';
       echo '<input type="checkbox" id="my_slider_field" name="my_slider_field" value="yes"';
       echo  ($saved) ? 'checked': '';
       echo '/>';
   }
   
   /* When the post is saved, saves our custom data */
   function my_slider_save_postdata( $post_id ) {
         // verify if this is an auto save routine. 
         // If it is our form has not been submitted, so we dont want to do anything
         if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) 
             return;
   
         // verify this came from the our screen and with proper authorization,
         // because save_post can be triggered at other times
   
         if ( !wp_verify_nonce( $_POST['my_slider_noncename'], plugin_basename( __FILE__ ) ) )
             return;
   
         // OK, we're authenticated: we need to find and save the data
           $old = get_post_meta($post_id,'my_slider_field',true);
         if (isset($_POST['my_slider_field']) && $_POST['my_slider_field'] == "yes"){
               update_post_meta($post_id,'my_slider_field',true);
         }else{
           if (!empty($old)){
               delete_post_meta($post_id,'my_slider_field');
           }
         }
   }
   

   Query posts that were checked

   $args = array(
       'posts_per_page' => -1
       'meta_query' => array(
           array(
               'key' => 'my_slider_field',
               'value' => true
           )
       );
   $slider_query = new WP_Query($args);
   

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