下面的代码是wordpress自定义插件代码。我正在尝试以下链接中的代码：

http://code.tutsplus.com/tutorials/create-a-custom-wordpress-plugin-from-scratch--net-2668

    <?php
    if($_POST[\'oscimp_hidden\'] == \'Y\') {
        //Form data sent
        $dbhost = $_POST[\'oscimp_dbhost\'];
        update_option(\'oscimp_dbhost\', $dbhost);

        $dbname = $_POST[\'oscimp_dbname\'];
        update_option(\'oscimp_dbname\', $dbname);

        $dbuser = $_POST[\'oscimp_dbuser\'];
        update_option(\'oscimp_dbuser\', $dbuser);

        $dbpwd = $_POST[\'oscimp_dbpwd\'];
        update_option(\'oscimp_dbpwd\', $dbpwd);

        $prod_img_folder = $_POST[\'oscimp_prod_img_folder\'];
        update_option(\'oscimp_prod_img_folder\', $prod_img_folder);

        $store_url = $_POST[\'oscimp_store_url\'];
        update_option(\'oscimp_store_url\', $store_url);
        ?>
        <div class="updated"><p><strong><?php _e(\'Options saved.\' ); ?></strong></p></div>
        <?php
    } else {
        //Normal page display
        $dbhost = get_option(\'oscimp_dbhost\');
        $dbname = get_option(\'oscimp_dbname\');
        $dbuser = get_option(\'oscimp_dbuser\');
        $dbpwd = get_option(\'oscimp_dbpwd\');
        $prod_img_folder = get_option(\'oscimp_prod_img_folder\');
        $store_url = get_option(\'oscimp_store_url\');
    }
?>
<div class="wrap">
    <?php    echo "<h2>" . __( \'OSCommerce Product Display Options\', \'oscimp_trdom\' ) . "</h2>"; ?>

         <form name="oscimp_form" method="post" action="<?php echo str_replace( \'%7E\', \'~\', $_SERVER[\'REQUEST_URI\']); ?>">
        <input type="hidden" name="oscimp_hidden" value="Y">
        <?php    echo "<h4>" . __( \'OSCommerce Database Settings\', \'oscimp_trdom\' ) . "</h4>"; ?>
        <p><?php _e("Database host: " ); ?><input type="text" name="oscimp_dbhost" value="<?php echo $dbhost; ?>" size="20"><?php _e(" ex: localhost" ); ?></p>
        <p><?php _e("Database name: " ); ?><input type="text" name="oscimp_dbname" value="<?php echo $dbname; ?>" size="20"><?php _e(" ex: oscommerce_shop" ); ?></p>
        <p><?php _e("Database user: " ); ?><input type="text" name="oscimp_dbuser" value="<?php echo $dbuser; ?>" size="20"><?php _e(" ex: root" ); ?></p>
        <p><?php _e("Database password: " ); ?><input type="text" name="oscimp_dbpwd" value="<?php echo $dbpwd; ?>" size="20"><?php _e(" ex: secretpassword" ); ?></p>
        <hr />
        <?php    echo "<h4>" . __( \'OSCommerce Store Settings\', \'oscimp_trdom\' ) . "</h4>"; ?>
        <p><?php _e("Store URL: " ); ?><input type="text" name="oscimp_store_url" value="<?php echo $store_url; ?>" size="20"><?php _e(" ex: http://www.yourstore.com/" ); ?></p>
        <p><?php _e("Product image folder: " ); ?><input type="text" name="oscimp_prod_img_folder" value="<?php echo $prod_img_folder; ?>" size="20"><?php _e(" ex: http://www.yourstore.com/images/" ); ?></p>

        <p class="submit">
        <input type="submit" name="Submit" value="<?php _e(\'Update Options\', \'oscimp_trdom\' ) ?>" />
        </p>
    </form>
</div>

配置文件数据如下所示：数据库主机：localhostdatabase名称：osc234database用户：rootpassword：passwordOSCommerce存储设置

Stroe URL：http://localhost:8383/osc-234/目录/索引。phpproduct映像文件夹：http://localhost:8383/osc-234/目录/图像

模板侧栏。php代码我放置了下面的代码

但我不确定我是否放在了正确的位置。图像未显示在前端。

我的侧边栏。php现在如下所示：

    <?php
/**
 * Sidebar containing the main widget area
 *
 * @package WordPress
 * @subpackage Twenty_Eleven
 * @since Twenty Eleven 1.0
 */

$options = twentyeleven_get_theme_options();
$current_layout = $options[\'theme_layout\'];

if ( \'content\' != $current_layout ) :
?>
        <div id="secondary" class="widget-area" role="complementary">
            <?php if ( ! dynamic_sidebar( \'sidebar-1\' ) ) : ?>

                <aside id="archives" class="widget">
                    <h3 class="widget-title"><?php _e( \'Archives\', \'twentyeleven\' ); ?></h3>
                    <ul>
                        <?php wp_get_archives( array( \'type\' => \'monthly\' ) ); ?>
                    </ul>
                </aside>

                <aside id="meta" class="widget">
                    <h3 class="widget-title"><?php _e( \'Meta\', \'twentyeleven\' ); ?></h3>
                    <ul>
                        <?php wp_register(); ?>
                        <li><?php wp_loginout(); ?></li>
                        <li><?php echo oscimp_getproducts(3); ?></li>
                        <?php wp_meta(); ?>
                    </ul>
                </aside>

            <?php endif; // end sidebar widget area ?>
        </div><!-- #secondary .widget-area -->
<?php endif; ?>

<?php 
    /*
    Plugin Name: OSCommerce Product Display
    Plugin URI: http://localhost:8383
    Description: Plugin for displaying products from an OSCommerce shopping cart database
    Author: Priya Mohan
    Version: 1.0

    */

    function oscimp_admin() {
    include(\'oscommerce_import_admin.php\');?>



<?php
}


    function oscimp_admin_actions() {
    add_options_page("OSCommerce Product Display", "OSCommerce Product Display", 1, "OSCommerce Product Display", "oscimp_admin");
}

add_action(\'admin_menu\', \'oscimp_admin_actions\');


function oscimp_getproducts($product_cnt=1) {
    //Connect to the OSCommerce database
    $oscommercedb = new wpdb(get_option(\'oscimp_dbuser\'),get_option(\'oscimp_dbpwd\'), get_option(\'oscimp_dbname\'), get_option(\'oscimp_dbhost\'));

    $retval = \'\';
    for ($i=0; $i<$product_cnt; $i++) {
        //Get a random product
        $product_count = 0;
        while ($product_count == 0) {
            $product_id = rand(0,30);
            $product_count = $oscommercedb->get_var("SELECT COUNT(*) FROM products WHERE products_id=$product_id AND products_status=1");
        }

        //Get product image, name and URL
        $product_image = $oscommercedb->get_var("SELECT products_image FROM products WHERE products_id=$product_id");
        $product_name = $oscommercedb->get_var("SELECT products_name FROM products_description WHERE products_id=$product_id");
        $store_url = get_option(\'oscimp_store_url\');
        $image_folder = get_option(\'oscimp_prod_img_folder\');

        //Build the HTML code
        $retval .= \'<div class="oscimp_product">\';
        $retval .= \'<a href="\'. $store_url . \'product_info.php?products_id=\' . $product_id . \'"><img src="\' . $image_folder . $product_image . \'" /></a><br />\';
        $retval .= \'<a href="\'. $store_url . \'product_info.php?products_id=\' . $product_id . \'">\' . $product_name . \'</a>\';
        $retval .= \'</div>\';

    }
    return $retval;
}
?>