How to create and link to administration page for a plugin?

OK Full Code:

<?php

//check to see whether the user is an admin or not.
if (is_admin()) {


function wpsc_display_products_seo(){
global $wpdb;
$productList = $wpdb->get_results("SELECT * FROM " . WPSC_TABLE_PRODUCT_LIST . " ORDER BY name ASC");
echo  get_admin_page_parent(); 

$path="admin.php?page=wpsc_product_seo_details";
$url = admin_url($path);


?>
<h2><?php _e('Products List','wpsc'); ?></h2>
<p>Below is a list of products. Select a product to edit it's SEO properties.</p>
    <table>
        <tr>
            <td></td>
            <td>Product Name</td>
            <td>Meta Title</td>
            <td>Meta Description</td>
            <td>Edit</td>
        </tr>
    </table>

    <table>
        <?php if($productList) : ?>
            <?php foreach($productList as $product) : ?>
                <?php $meta = getProductMeta($product->id); ?>
                <tr style="background:#fff;">
                    <td width="200"><?php echo $product->name; ?></td>
                    <td width="300"><?php getVal($meta, 'meta_title'); ?></td>
                    <td width="200"><?php getVal($meta, 'meta_description'); ?></td>
                    <td width="200"><?php getVal($meta, 'meta_keywords'); ?></td>
                    <td width="200"><a href="https://wordpress.stackexchange.com/questions/4677/<?php echo $url; ?>">Edit</a></td>
                </tr>
            <?php endforeach; ?>
        <?php endif; ?>
    </table>

<?php

}

function wpsc_product_seo_details()
{
    echo "<h2>Hello</h2>";
}

function getProductMeta($id)
{
    global $wpdb;
    $meta = $wpdb->get_results("SELECT * FROM " . WPSC_TABLE_PRODUCT_META . " WHERE product_id = $id");
    if($meta)
    {
        return $meta;
    } else {
        return null;
    }
}

function getVal($RS, $key)
{
    if($RS)
    {
        if (property_exists($RS, $key))
        {
            return $RS->$key;
        } 
    }
    return null;

}




    function wpsc_add_seo_admin_pages($page_hooks, $base_page) {
        $page_hooks[] =  add_submenu_page($base_page, __('SEO For Products','wpsc'),  __('SEO For Products','wpsc'), 7, 'wpsc-module-seo', 'wpsc_display_products_seo');
        return $page_hooks;
    }
    add_filter('wpsc_additional_pages', 'wpsc_add_seo_admin_pages',10, 2);
}

?>

OLD POST

Hi Guys,

I am currently writing a plugin for my client in wordpress. The issue I am having is when a user clicks on edit to change a record I am not sure how to create the admin link to do this.

i.e.

<a href="https://wordpress.stackexchange.com/questions/4677/<?php echo get_bloginfo("url'); ?>/wp-admin/admin.php?page=wpsc_product_seo_details">Edit</a>


function wpsc_product_seo_details()
{
    echo "<h2>Hello</h2>";
}

I know my markup for the tag is probably wrong but I was just testing. Do I need to register a hook to do this.

I am not sure what you are trying to do.

Admin links can be conveniently created with admin_url() function, like this:

$path="admin.php?page=wpsc_product_seo_details";
$url = admin_url($path);
$link = "<a href="https://wordpress.stackexchange.com/questions/4677/{$url}">Edit</a>";
echo $link;

What exactly do you have problem with?