Programming PHP

Two HTML forms are needed to populate the database tables. One form provides
the site administrator with the means to add category IDs, titles, and descriptions.
The second form, used by the self-registering businesses, collects the business contact
information and permits the registrant to associate the listing with one or more
categories. A separate page displays the listings by category on the web page.
Database Tables
There are three tables: businesses to collect the address data for each business,
categories to name and describe each category, and an associative table called biz_
categories to relate entries in the other two tables to each other. These tables and
their relationships are shown in Figure 8-3.
Businesses
Business ID
Name
Address
City
Telephone
URL
Figure 8-3. Database design for business listing service
Example 8-2 contains a dump of the table schema in MySQL format. Depending on
your database’s features, the schema may have to be altered slightly.
Example 8-2. Database schema
# --------------------------------------------------------
#
# Table structure for table 'biz_categories'
#
CREATE TABLE biz_categories (
business_id int(11) NOT NULL,
category_id char(10) NOT NULL,
PRIMARY KEY (business_id, category_id),
KEY business_id (business_id, category_id)
);
1,n
Biz_Categories
Business ID
Category ID
1,n
# --------------------------------------------------------
#
# Table structure for table 'businesses'
#
CREATE TABLE businesses (
business_id int(11) NOT NULL auto_increment,
name varchar(255) NOT NULL,
Categories
Category ID
Title
Description
This is the Title of the Book, eMatter Edition
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