hrushi9 0 Light Poster

I'm beginner to wordpress I'm writing Business Directory Plugin for test from scratch.
I have category page with database. how to add image support for categories?

I got error while uploading images.

"File is empty. Please upload something more substantial. This error could also be caused by uploads being disabled in your php.ini or by post_max_size being defined as smaller than upload_max_filesize in php.ini."

I made changes to post_max_size & upload_max_filesize but not working

Please help me to complete Business Directory Plugin

Database

CREATE TABLE IF NOT EXISTS `lstngs_mbl_categories` (
`id` mediumint(11) NOT NULL,
  `name` varchar(55) COLLATE utf8_unicode_ci NOT NULL,
  `description` text COLLATE utf8_unicode_ci NOT NULL,
  `image` tinytext COLLATE utf8_unicode_ci NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

plugin structure

**main plugin folder**
my-business-directory

    => my-business-directory.php /*main plugin file  inside my-business-directory*/

    => cat-img      /*folder inside my-business-directory*/
    => css          /*folder inside my-business-directory*/
    => images       /*folder inside my-business-directory*/
    => inc          /*folder inside my-business-directory*/

       inside inc folder
       => inc_mbl_categories_page
       => inc_mbl_listings_page
       => inc_mbl_settings_page

my-business-directory.php

    <?php
        /*
        Plugin Name: My Business Listings
        Plugin URI: http://www.hrushi9.com/
        Version: 0.1
        Author: hrushi9
        Description: My Business Directory Plugin
        */

        function incAdminCSS()
            {
            echo '<link type="text/css" rel="stylesheet" href="' . plugins_url() . '/my-business-directory/css/mbl-admin.css" />' . "\n";
            }

        function incPublicCSS()
            {
            echo '<link type="text/css" rel="stylesheet" href="' . plugins_url() . '/my-business-directory/css/mbl-sc.css" />' . "\n";
            }

        add_action('admin_head', 'incAdminCSS');
        add_action('wp_head', 'incPublicCSS');
        add_action('admin_menu', 'mbl_menu');

        function mbl_menu()
            {
              // create new top-level menu

            add_menu_page('Business Listings', 'My Business Listings', 'administrator', 'mbl_settings', 'mbl_settings_page', plugins_url() . '/my-business-directory/images/accessibility-directory.png');

            // create new submenus               

            add_submenu_page('mbl_settings', 'Categories', 'Listings Categories', 'administrator', 'mbl_settings_categories', 'mbl_categories_page');
            add_submenu_page('mbl_settings', 'Listings', 'Business Listings', 'administrator', 'mbl_settings_listings', 'mbl_listings_page');               

            add_submenu_page('', 'Edit Listings', 'Edit Listings', 'administrator', 'mbl_settings_edit_listings', 'mbl_edit_listing_page');

            // call register settings function
            //  add_action('admin_init','register_mbl_settings');

            }

        include ("inc/inc_mbl_settings_page.php");

        include ("inc/inc_mbl_categories_page.php");

        include ("inc/inc_mbl_listings_page.php");

    ?>

inc_mbl_settings_page.php

    <?php

    function mbl_settings_page()
        {
    ?>

    <h2>General Settings</h2>

    <h3>About My Business Listings</h3>

    <p>This plugin provides functionality to display business listings based on the category.

    <?php
        }
    ?>

inc_mbl_categories_page.php

    <?php

    function mbl_categories_page()
        {
        global $wpdb;
        if ($_POST['action'] == "add_category")
            {
            $name = mysql_real_escape_string(stripslashes($_POST['mbl_category_name']));
            $description = mysql_real_escape_string(stripslashes($_POST['mbl_category_description']));
            $image = mysql_real_escape_string(stripslashes($_POST['mbl_category_image']));
            $wpdb->insert($wpdb->prefix . 'mbl_categories', array(
                'name' => $name,
                'description' => $description,
                'image' => $image
            ));

            //path to store and retrieve images 
            echo $mbl_category_imagepath = '' . plugins_url() . '/my-business-directory/cat-img';

            }

        if ($_POST['action'] == "delete_category")
            {
            $id = $_POST['mbl_category_id'];
            $wpdb->query("DELETE FROM " . $wpdb->prefix . "mbl_categories WHERE id=$id");
            }
    ?>

    <div class="wrap">
    <h3>Create A New Category</h3>
    <form method="post" name="test_form">
      <input type="hidden" name="action" value="add_category" />
      <table class="form-table">
        <tr valign="top">
          <th scope="row"><strong>Category Name</strong></th>
          <td><input type="text" name="mbl_category_name" value="" size="56" /></td>
        </tr>
        <tr valign="top">
          <th scope="row"><strong>Category Description</strong></th>
          <td><textarea name="mbl_category_description" cols="50" rows="2"></textarea></td>
        </tr>
        <tr valign="top">
          <th scope="row"><strong>Category image</strong></th>
          <td><input type="file" name="mbl_category_image"  /></td>
        </tr>
      </table>
      <p class="submit">
        <input type="submit" class="button-primary" value="Create Category" />
      </p>
    </form>
    <h2>Paid Business Listings Categories</h2>
    <table class="mbladmin">
      <tr class="headrow">
        <td>ID</td>
        <td>&nbsp;</td>
        <td>Image</td>
        <td>Category Name</td>
        <td width="300">Description</td>
        <td>Shortcode</td>
        <td>&nbsp;</td>
      </tr>
      <?php
        global $wpdb;
        $categories = $wpdb->get_results("SELECT id,name,description,image FROM " . $wpdb->prefix . "mbl_categories");
        foreach($categories as $cat)
            {
            $id = $cat->id;
            $name = stripslashes($cat->name);
            $description = stripslashes($cat->description);
            $image = stripslashes($cat->image);
            $mbl_category_imagepath = '' . plugins_url() . '/my-business-directory/cat-img';
            echo "<tr class='datarow'><td>$id</td><td><img src=$mbl_category_imagepath/$image' width='65'></td><td>$name</td><td>$description</td><td>[mbl-listings category=\"$id\"]</td><td><form method='post'><input type='hidden' name='action' value='delete_category' /><input type='hidden' name='mbl_category_id' value='$id' /><input type='submit' class='button-secondary' value='Delete Category' /></form></td></tr>";
            }
    ?>
    </table>
    <?php
        }
    ?>

inc_mbl_listings_page

<?php
function mbl_listings_page() {
?>

<h2>Show Business Listings Page</h2>


<?php
    }
?>