custom post type with metabox texanomy

custom post type with metabox texanomy

<?php
/**
 * register product post type and taxonomy
 */
function hip_med_register_product()
{
	register_post_type('product', [
		'labels'      => [
			'name'=> __('Products','hip'),
			'singular_name'=>__('Product','hip'),
			'all_items' => __('All Products','hip'),
			'add_new_item'=>__('Add New Product','hip'),
			'edit_item' => __('Edit Product','hip'),
			'view_item' => __('View Product','hip'),
			'new_item' => __('New Product','hip'),
			'search_items' => __('Search Products','hip')
		],
		'public'      => true,
		'has_archive' => 'products',
		'hierarchical'=> true,
		'show_in_admin_bar'=> true,
		'menu_position' => 25,
		'menu_icon' => 'dashicons-products',
		'supports'    => [
			'title',
			'editor',
			'thumbnail',
			'excerpt',
			'page-attributes',
			'revisions'
		]
	]);
	register_taxonomy('product_category','product',[
		'labels' => [
			'name'=> __('Product Categories','hip'),
			'singular_name'=> __('Product Category','hip'),
			'all_items' => __('All Product Categories','hip'),
			'add_new_item'=> __('Add New Product Category','hip'),
			'edit_item' => __('Edit Product Category','hip'),
			'view_item' => __('View Product Category','hip'),
			'new_item' => __('New Product Category','hip'),
			'search_items' => __('Search Products Categories','hip')
		],
		'public' => true,
		'show_ui' => true,
		'has_archive'=> 'product-category',
		'hierarchical'=> true,
		'show_admin_column' => true
	]);
}
add_action('init', 'hip_med_register_product');

/**
 * register product metabox
 */
function register_product_metabox()
{
	add_meta_box(
		'product-metabox',
		'Product Name',
		'product_metabox_content',
		'product',
		'advanced',
		'high'
	);
}
add_action('add_meta_boxes', 'register_product_metabox');

/**
 * content product metabox
 */
function product_metabox_content($post)
{
	wp_nonce_field(basename(__FILE__), 'product_metabox_nonce');
	$product_name = get_post_meta($post->ID,'product_name',true);
	?>
	<div style="padding: 10px 0">
		<input name="product_name" type="text" class="widefat" value="<?php echo !empty($product_name) ? $product_name : ''; ?>" placeholder="Enter product display name"/>
	</div>
	<?php
}
/**
 * save product metabox value
 */
function save_product_metabox_value($post_id,$post)
{
	$product_name = '';

	if (!isset($_POST["product_metabox_nonce"]) || !wp_verify_nonce($_POST["product_metabox_nonce"], basename(__FILE__))) {
		return $post_id;
	}
	if (!current_user_can("edit_post", $post_id)) {
		return $post_id;
	}
	if (defined("DOING_AUTOSAVE") && DOING_AUTOSAVE) {
		return $post_id;
	}
	if ('product' != $post->post_type) {
		return $post_id;
	}
	if (isset($_POST['product_name'])) {
		$product_name = sanitize_text_field($_POST['product_name']);
	}
	update_post_meta($post_id, 'product_name', $product_name);
	return $post_id;
}
add_action('save_post', 'save_product_metabox_value',10,2);

/**
 * move product name metabox to top
 */
function move_metabox_to_top()
{
	global $post, $wp_meta_boxes;
	if(get_post_type() == 'product'){
		do_meta_boxes(get_current_screen(), 'advanced', $post);
		unset($wp_meta_boxes['product']['advanced']);
	}
}
add_action('edit_form_after_title', 'move_metabox_to_top');


function add_product_metabox_margin(){
	$screen = get_current_screen();
	if($screen->id == 'product'){
		add_action('admin_head',function(){
			echo '<style id="product-custom">#product-metabox{margin-top: 20px;}</style>';
		});
	}
}
add_action('current_screen','add_product_metabox_margin');