metabox.php

<?php
/**
 * Plugin Name: Vedamore
 * Plugin URI: http://vedamore.com/
 * Description: Plugin to add a meta box for beads for different products
 * Version: 1.6.6
 * Author: Webly
 * Author URI: http://webly.co
 * Requires at least: 3.3
 * Tested up to: 3.5
 *
 * Text Domain: webly
 * Domain Path: /languages/
 *
 * @package Vedamore
 * @category Core
 * @author Webly
 */
/**
 * Check if WooCommerce is active
 **/
if ( in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) {


    function wr_call_meta_box($post = null)
    {
        add_meta_box(
            'weather_box',
            __('Current Weather', 'wr_plugin'),
            'wr_display_meta_box',
            'product',
            'advanced',
            'default'
        );
    }
    add_action('add_meta_boxes_product', 'wr_call_meta_box', 10, 1);
    add_action('save_post', 'wr_save_meta_box', 10, 2);

    function wr_save_meta_box($post_id, $post)
    {
        if(defined('DOING_AUTOSAVE') && DOING_AUTOSAVE)
    	return;

        if('page' == $_POST['post_type'])
        {
            if(!current_user_can('edit_page', $post_id))
                return;
        }
        else
            if(!current_user_can('edit_post', $post_id))
                return;
    
        if(isset($_POST['wr_plugin_noncename']) && wp_verify_nonce($_POST['wr_plugin_noncename'], plugins_url(__FILE__)) && check_admin_referer(plugins_url(__FILE__), 'wr_plugin_noncename'))
        {
             if(is_numeric($_POST['wr-temperature']))
             {
                 update_post_meta($post_id, 'wr-temperature', $_POST['wr-temperature']);
             }
        }
        return;
    }




    function wr_display_meta_box($post, $args)
    {
        wp_nonce_field(plugins_url(__FILE__), 'wr_plugin_noncename');
?>
        <p>
            <label for="wr-temperature"><?php _e('Temperature (&deg;F)', 'wr_plugin'); ?>: </label>
            <input type="text" id="wr-temperature" name="wr-temperature" value="<?php echo get_post_meta($post->ID, 'wr-temperature', true); ?>" />
            <em><?php _e('Must be a numeric value', 'wr_plugin'); ?></em>
        </p>
        <?php
    }


}


?>