Лучшая статья

	// Add Featured meta to Publish box
	add_action('post_submitbox_misc_actions', 'mts_featured_post_field');
	function mts_featured_post_field () {
		global $post;
		
		/* check if this is a post, if not then we won't add the custom field */
		/* change this post type to any type you want to add the custom field to */
		if (get_post_type($post) != 'post')
			return false;
		
		/* get the value corrent value of the custom field */
		$value = get_post_meta($post->ID, 'mts_featured', true);
		?>
		<div class="misc-pub-section" id="mts_featured_field">
			<?php //if there is a value (1), check the checkbox
			?>
			<label>
				<div class="dashicons dashicons-star-empty" style="padding: 0 2px 0 0; color: #888;"></div>
				Лучшая статья <input type="checkbox"<?php echo(!empty($value) ? ' checked="checked"' : null) ?>value="1"
						name="mts_featured" id="mts_featured" style="display: none;"/></label>
		</div>
		<script>jQuery(document).ready(function ($) {
                $('#mts_featured').change(function () {
                    var $this = $(this),
                        $icon = $this.parent().find('.dashicons');

                    if ($this.is(':checked')) {
                        $icon.attr('class', 'dashicons dashicons-star-filled');
                    } else {
                        $icon.attr('class', 'dashicons dashicons-star-empty');
                    }
                });
                $('#mts_featured_field .dashicons').attr('class', function () {
                    return $('#mts_featured').is(':checked') ? 'dashicons dashicons-star-filled' : 'dashicons dashicons-star-empty';
                });
            });</script>
		<?php
	}
	
	add_action('save_post', 'mts_save_featured_meta');
	function mts_save_featured_meta ($postid) {
		/* check if this is an autosave */
		if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE)
			return false;
		
		/* check if the user can edit this page */
		if (!current_user_can('edit_page', $postid))
			return false;
		
		// check if quick edit
		if (isset($_POST['_inline_edit']) && wp_verify_nonce($_POST['_inline_edit'], 'inlineeditnonce')) {
			return;
		}
		
		/* check if there's a post id and check if this is a post */
		/* make sure this is the same post type as above */
		if (empty($postid) || (!empty($_POST['post_type']) && $_POST['post_type'] != 'post') ||
			(!empty($_GET['post_type']) && $_GET['post_type'] != 'post')
		)
			return false;
		
		/* if you are going to use text fields, then you should change the part below */
		/* use add_post_meta, update_post_meta and delete_post_meta, to control the stored value */
		
		/* check if the custom field is submitted (checkboxes that aren't marked, aren't submitted) */
		if (isset($_POST['mts_featured'])) {
			/* store the value in the database */
			add_post_meta($postid, 'mts_featured', 1, true);
		} else {
			/* not marked? delete the value in the database */
			delete_post_meta($postid, 'mts_featured');
		}
	}