我在管理的链接部分保存元框的数据时遇到问题。我的代码正在运行，因为当我在帖子或页面部分尝试它时，它会保存数据，但在链接中却不会。

这是我的密码。我应该写些别的东西而不是“save\\u post”吗？我看到一些使用过的“save\\u link”尝试过，尽管人们回复说它不存在，但它不起作用。。。我的意思是，当我将其添加到帖子或页面时，它会起作用，但当我将“页面”（或“帖子”）更改为“链接”时，当我添加元框时，不会保存任何内容，当我再次转到链接表单时，当我应该拥有图像的链接时，我的输入返回空白。数据也没有保存在数据库中，我也不知道为什么。

这是我的代码：

    add_action( \'admin_init\', \'meta_boxes_setupa\' );
function meta_boxes_setupa() {
    add_action( \'add_meta_boxes\', \'mytheme_add_box\' );
    add_action( \'save_post\', \'mytheme_save_data\', 10, 2 );
}
// add_action(\'admin_menu\', \'mytheme_add_box\');
// Add meta box
function mytheme_add_box() {
        add_meta_box(
                        \'my-meta-box\',
                        \'Ajouter le logo de la société\',
                        \'mytheme_show_box\',
                        \'link\',
                        \'normal\',
                        \'high\'
        );
}

// Callback function to show fields in meta box
function mytheme_show_box( $object, $box ) {
        // global $post;
        // echo \'<input type="hidden" name="mytheme_meta_box_nonce" value="\', wp_create_nonce(basename(__FILE__)), \'" />\';
        // $meta = get_post_meta($post->ID, \'_upload_image\', true);
        ?>
        <?php wp_nonce_field( basename( __FILE__ ), \'url_nonce\' ); ?>
                <label for="upload_image">Sélectionner le logo : </label>
                <input type="text" name="upload_image" id="upload_image" value="<?php echo esc_attr( get_post_meta( $object->ID, \'_upload_image\', true ) ); ?>" size="40" readonly="readonly" />
                <input type="button" name="upload_image_button" id="upload_image_button" value="Parcourir" ?>
        <?php
}


// Save data from meta box
function mytheme_save_data($post_id, $post) {
        if ( !isset( $_POST[\'url_nonce\'] ) || !wp_verify_nonce( $_POST[\'url_nonce\'], basename( __FILE__ ) ) )
        return $post_id;

    $post_type = get_post_type_object( $post->post_type );
    /* Check if the current user has permission to edit the post. */
    if ( !current_user_can( $post_type->cap->edit_post, $post_id ) )
        return $post_id;

    /* Get the posted data and sanitize it for use as an HTML class. */
        $new_meta_value = ( isset( $_POST[\'upload_image\'] ) ? sanitize_html_class( $_POST[\'upload_image\'] ) : \'\' );
    /* Get the meta key. */
    $meta_key = \'_upload_image\';
    /* Get the meta value of the custom field key. */
    $meta_value = get_post_meta( $post_id, $meta_key, true );
    /* If a new meta value was added and there was no previous value, add it. */
    if ( $new_meta_value && \'\' == $meta_value )
        add_post_meta( $post_id, $meta_key, $new_meta_value, true );
    /* If the new meta value does not match the old value, update it. */
    elseif ( $new_meta_value && $new_meta_value != $meta_value )
       update_post_meta( $post_id, $meta_key, $new_meta_value );
    /* If there is no new meta value but an old value exists, delete it. */
    elseif ( \'\' == $new_meta_value && $meta_value )
        delete_post_meta( $post_id, $meta_key, $meta_value );
}

function my_admin_scripts() {
        wp_enqueue_script(\'media-upload\');
        wp_enqueue_script(\'thickbox\');
        wp_register_script(\'my-upload\', get_bloginfo(\'template_url\') . \'/functions/my-script.js\', array(\'jquery\',\'media-upload\',\'thickbox\'));
        wp_enqueue_script(\'my-upload\');
}
function my_admin_styles() {
        wp_enqueue_style(\'thickbox\');
}
add_action(\'admin_print_scripts\', \'my_admin_scripts\');
add_action(\'admin_print_styles\', \'my_admin_styles\');