athinaok

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The options myst be Yes
https://c2n.me/3NUf3Zl.png

And this is one similar version.

Now text boxes have default value the latest gold value update.
URL for the xml :

https://www.igolder.com/gold-charts/Configure.aspx
and params are EUR Gold per gram.

<?php
/**
 * Plugin Name: WooCommerce Gold Price
 * Plugin URI: https://omniwp.com.br/plugins/woocommerce-gold-price/
 * Description: Adds a Gold Price for 9k/14k/18k/22k/24k gold products, making easy to update their prices
 * Version: 2.4.4
 * Author: Gabriel Reguly
 * Author URI: https://omniwp.com.br
 * Requires at least: 3.5
 * Tested up to: 4.3
 *
 * Text Domain: woocommerce-gold-price
 * Domain Path: /languages/
 */
if (!defined('ABSPATH'))
    exit; // Exit if accessed directly

add_action('plugins_loaded', 'woocommerce_gold_price', 20);

function woocommerce_gold_price()
{
    if (!class_exists('Woocommerce')) {
        return false;
    }

    add_filter('plugin_action_links', 'woocommerce_gold_price_action_links', 10, 2);

    add_action('admin_init', 'woocommerce_gold_price_admin_init');
    add_action('admin_menu', 'woocommerce_gold_price_admin_menu', 10);

    load_plugin_textdomain('woocommerce-gold-price', false,
        '/woocommerce-gold-price/languages');

    function woocommerce_gold_price_admin_init()
    {
        global $weight_unit, $weight_unit_description;

        //		register_setting( $option_group, $option_name, $sanitize_callback );
        register_setting('woocommerce_gold_price_options',
            'woocommerce_gold_price_options', 'woocommerce_gold_price_validate_options');

        //		add_settings_section( $id, $title, $callback, $page );
        add_settings_section('woocommerce_gold_price_plugin_options_section', __('Gold Price Values',
            'woocommerce-gold-price'), 'woocommerce_gold_price_fields',
            'woocommerce_gold_price');

        //		add_settings_field( $id, $title, $callback, $page, $section, $args );
        add_settings_field('woocommerce_gold_price_options', __('Gold Price Values',
            'woocommerce-gold-price'), 'woocommerce_gold_price_fields',
            'woocommerce_gold_price_plugin_options_section', 'woocommerce_gold_price');
        $weight_unit = get_option('woocommerce_weight_unit');
        $weight_unit_description = array(
            'kg' => __('kg', 'woocommerce'),
            'g' => __('g', 'woocommerce'),
            'lbs' => __('lbs', 'woocommerce'),
            'oz' => __('oz', 'woocommerce'));
    }

    function woocommerce_gold_price_admin_menu()
    {
        global $menu, $woocommerce;
        if (current_user_can('manage_woocommerce')) {

            do_action('woocommerce_admin_css');
            /*
            //	add_submenu_page( $parent_slug,
            $page_title,
            $menu_title,
            $capability,
            $menu_slug,
            $function
            */
            add_submenu_page('woocommerce', __('Gold Price', 'woocommerce-gold-price'), __('Gold Price',
                'woocommerce-gold-price'), 'manage_woocommerce', 'woocommerce_gold_price',
                'woocommerce_gold_price_page');
        }
    }

    function get_xml_price($url)
    {
        $url = 'https://www.igolder.com/GoldData.ashx?type=Historical&hours=0&currency=EUR&tz=GTB%20Standard%20Time&unit=gr&output=xml';

        $xml_igolder = new SimpleXMLElement(file_get_contents($url));
        return (array )$xml_igolder->Price;
    }

    function woocommerce_gold_price_page()
    {
        global $weight_unit, $weight_unit_description;
        if (!isset($_REQUEST['settings-updated'])) {
            $_REQUEST['settings-updated'] = false;
        }
        if (false !== $_REQUEST['settings-updated']) {
?>
            <div id="message" class="updated notice">
                <p><strong><?php _e('Your settings have been saved.',
'woocommerce') ?></strong></p>
            </div>
            <?php
        }
?>
        <div class="wrap woocommerce">
            <div class="icon32 icon32-woocommerce-settings" id="icon-woocommerce"><br /></div>
            <h1><?php _e('Gold Price', 'woocommerce-gold-price') ?></h1>
            <form method="post" action="options.php" onSubmit="<?php $runs = $runs +
1; ?>" );">
                <?php
        settings_fields('woocommerce_gold_price_options');
        do_settings_sections('woocommerce_gold_price');
?>

                <p class="submit">
                    <input type="submit" class="button-primary" value="<?php _e('Save Changes') ?>" />
                </p>
            </form>
            <h1><?php _e('Gold priced products', 'woocommerce-gold-price') ?></h1>
            <?php
        $options = get_option('woocommerce_gold_price_options');
        if (!$options) {
            $options = array(
                '24k' => 0,
                '22k' => 0,
                '18k' => 0,
                '14k' => 0,
                '9k' => 0); //meta values
        }
        foreach ($options as $key => $value) {
?>
                <h2><?php echo $key ?></h2>
                <?php

                         $the_query = new WP_Query(array(
            'post_type' => 'product',
            'posts_per_page' => -1,
            'meta_key' => 'karat',
            'meta_value' => substr($key, 0, -1))); // meta values 24k, 22k, 18k, 14k, 9k  => 24, 22, 18, 14, 9 

            if (0 == $the_query->found_posts) {
                echo '<p>' . __('No products', 'woocommerce-gold-price') . '</p>';
            } else {
                echo '
	<ol>';
                // The Loop
                while ($the_query->have_posts()):
                    $the_query->the_post();
                    $the_product = get_product($the_query->post->ID);
                    $edit_url = admin_url('post.php?post=' . $the_product->id . '&action=edit');
                    $message = '';
                    echo '
		<li><a href="' . $edit_url . '">' . get_the_title() . '</a>';
                    if (!$the_product->has_weight()) {
                        $message = __('Product has zero weight, can\'t calculate price based on weight',
                            'woocommerce-gold-price');
                    } else {
                        $the_product->regular_price = $the_product->weight * $value;

                        $labor = get_post_meta($the_query->post->ID, 'labor', true);

                        $the_product->regular_price = $the_product->regular_price + $labor;
                        if ($the_product->is_on_sale()) {
                            $message = __('Product was on sale, can\'t calculate sale price',
                                'woocommerce-gold-price');
                        }
                        echo ': ' . $the_product->weight . $weight_unit_description[$weight_unit] .
                            ' * ' . woocommerce_price($options[$key]) . ' + ' . $labor . ' € labor costs = ' .
                            woocommerce_price($the_product->regular_price);
                        if (false !== $_REQUEST['settings-updated']) {
                            update_post_meta($the_product->id, '_price', $the_product->regular_price);
                            update_post_meta($the_product->id, '_regular_price', $the_product->
                                regular_price);
                            update_post_meta($the_product->id, '_sale_price', '');
                            update_post_meta($the_product->id, '_sale_price_dates_from', '');
                            update_post_meta($the_product->id, '_sale_price_dates_to', '');
                        }
                    }
                    echo ' ' . $message . '</li>';
                endwhile;
                echo '
	</ol>';
            }
            // Restore original Query & Post Data
            wp_reset_query();
            wp_reset_postdata();
        }
?>
        </div>
        <?php
    }

    function woocommerce_gold_price_fields()
    {
        global $weight_unit, $weight_unit_description;

        $options = get_option('woocommerce_gold_price_options');
        $currency_pos = get_option('woocommerce_currency_pos');
        $currency_symbol = get_woocommerce_currency_symbol();
?>
        <table class="form-table widefat">
            <thead>
                <tr valign="top">
                    <th scope="col">?<?php _e('Karats','woocommerce-gold-price') ?></th>
                    <th scope="col"><?php _e('Price', 'woocommerce') ?></td>
                    <th scope="col"><?php _e('Weight Unit', 'woocommerce') ?></td>
                </tr>
            </thead>
            <!--New Line with Option-->
            <tr valign="top">
                <th scope="row">?<label for="woocommerce_gold_price_options_24">24k</label></th>
                <td>
                    <?php
        $xml_price = get_xml_price();

        // $input = '<input id = "woocommerce_gold_price_options_24" name = "woocommerce_gold_price_options[24k]" size = "10" type = "text" value = "' . $options['24k'] . '" />';
        $input = '<input id = "woocommerce_gold_price_options_24" name = "woocommerce_gold_price_options[24k]" size = "10" type = "text" value = "' .
            round($xml_price['@attributes']['Value'] * 1, 2) . '" />';

        switch ($currency_pos) {
            case 'left':
                echo $currency_symbol . $input;
                break;
            case 'right':
                echo $input . $currency_symbol;
                break;
            case 'left_space':
                echo $currency_symbol . '?
            ' . $input;
                break;
            case 'right_space':
                echo $input . '?
            ' . $currency_symbol;
                break;
        }
?>
                </td>
                <td><?php echo $weight_unit_description[$weight_unit] ?></td>
            </tr>
            <!--New meta value End-->
            <!--New Line with meta value-->
            <tr valign="top" class="alternate">
                <th scope="row">?<label for="woocommerce_gold_price_options_22">22k</label></th>
                <td>
                    <?php
        //	$input = '<input id = "woocommerce_gold_price_options_22" name = "woocommerce_gold_price_options[22k]" size = "10" type = "text" value = "' . $options['22k'] . '" />';
        $get_xml_price = get_xml_price();

        $input = '<input id = "woocommerce_gold_price_options_22" name = "woocommerce_gold_price_options[22k]" size = "10" type = "text" value = "' .
            round($xml_price['@attributes']['Value'] * 0.917, 2) . '" />';
        switch ($currency_pos) {
            case 'left':
                echo $currency_symbol . $input;
                break;
            case 'right':
                echo $input . $currency_symbol;
                break;
            case 'left_space':
                echo $currency_symbol . '?
            ' . $input;
                break;
            case 'right_space':
                echo $input . '?
            ' . $currency_symbol;
                break;
        }
?>
                </td>
                <td><?php echo $weight_unit_description[$weight_unit] ?></td>
            </tr>
            <!--New meta value End-->
            <!--New Line with meta value-->
            <tr valign="top">
                <th scope="row">?<label for="woocommerce_gold_price_options_18">18k</label></th>
                <td>
                    <?php
        // $input = '<input id = "woocommerce_gold_price_options_18" name = "woocommerce_gold_price_options[18k]" size = "10" type = "text" value = "' . $options['18k'] . '" />';
        $input = '<input id = "woocommerce_gold_price_options_18" name = "woocommerce_gold_price_options[18k]" size = "10" type = "text" value = "' .
            round($xml_price['@attributes']['Value'] * 0.75, 2) . '" />';
        switch ($currency_pos) {
            case 'left':
                echo $currency_symbol . $input;
                break;
            case 'right':
                echo $input . $currency_symbol;
                break;
            case 'left_space':
                echo $currency_symbol . '?
            ' . $input;
                break;
            case 'right_space':
                echo $input . '?
            ' . $currency_symbol;
                break;
        }
?>
                </td>
                <td><?php echo $weight_unit_description[$weight_unit] ?></td>
            </tr>
            <!--New meta value End-->
            <!--New Line with meta value-->
            <tr valign="top" class="alternate">
                <th scope="row">?<label for="woocommerce_gold_price_options_14">14k</label></th>
                <td>
                    <?php
        // $input = '<input id = "woocommerce_gold_price_options_14" name = "woocommerce_gold_price_options[14k]" size = "10" type = "text" value = "' . $options['14k'] . '" />';
        $input = '<input id = "woocommerce_gold_price_options_14" name = "woocommerce_gold_price_options[14k]" size = "10" type = "text" value = "' .
            round($xml_price['@attributes']['Value'] * 0.583, 2) . '" />';

        switch ($currency_pos) {
            case 'left':
                echo $currency_symbol . $input;
                break;
            case 'right':
                echo $input . $currency_symbol;
                break;
            case 'left_space':
                echo $currency_symbol . '?
            ' . $input;
                break;
            case 'right_space':
                echo $input . '?
            ' . $currency_symbol;
                break;
        }
?>
                </td>
                <td><?php echo $weight_unit_description[$weight_unit] ?></td>
            </tr>
            <!--New meta value End-->
            <!--New Line with meta value-->
            <tr valign="top" >
                <th scope="row">?<label for="woocommerce_gold_price_options_9">9k</label></th>
                <td>
                    <?php
        //$input = '<input id = "woocommerce_gold_price_options_9" name = "woocommerce_gold_price_options[9k]" size = "10" type = "text" value = "' . $options['9k'] . '" />';
        $input = '<input id = "woocommerce_gold_price_options_9" name = "woocommerce_gold_price_options[9k]" size = "10" type = "text" value = "' .
            round($xml_price['@attributes']['Value'] * 0.375, 2) . '" />';

        switch ($currency_pos) {
            case 'left':
                echo $currency_symbol . $input;
                break;
            case 'right':
                echo $input . $currency_symbol;
                break;
            case 'left_space':
                echo $currency_symbol . '?
            ' . $input;
                break;
            case 'right_space':
                echo $input . '?
            ' . $currency_symbol;
                break;
        }
?>
                </td>
                <td><?php echo $weight_unit_description[$weight_unit] ?></td>
            </tr>
            <!--New meta value End-->

            <tr valign="top" >
                <td>
                    Last XML Update <?php echo $xml_price['@attributes']['Date'] ?>
                </td>
            </tr>

        </table>

        <?php
    }

    function woocommerce_gold_price_validate_options($input)
    {
        foreach ($input as $key => $value) {
            $input[$key] = wp_filter_nohtml_kses($value);
        }
        return $input;
    }

    // Display a Settings link on the main Plugins page
    function woocommerce_gold_price_action_links($links, $file)
    {
        if (plugin_basename(__file__) == $file) {
            $woocommerce_gold_price_settings_link = '<a href = "' . get_admin_url() .
                'admin.php?page=woocommerce_gold_price">' . __('Settings') . '</a>';
            // make the 'Settings' link appear first
            array_unshift($links, $woocommerce_gold_price_settings_link);
        }
        return $links;
    }

}

?>

Go to Kraken.io Settings -> Advance settings -> Show metadata reset per image: Reset All Images

Hello,
It seems when we check option plugin will not use po files.
I am from Greece and I face the same issue.
Since i have translated all data and save GR po file,I am able to see the translated data in plug in options.
On the other hand on front end, plug in display the english language.
Could you please fix the bug?