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Unformatted text preview: Practical PHP 7, MySQL 8, and MariaDB Website Databases A Simplified Approach to Developing Database-Driven Websites — Second Edition — Adrian W. West Steve Prettyman Practical PHP 7, MySQL 8, and MariaDB Website Databases A Simplified Approach to Developing Database-Driven Websites Second Edition Adrian W. West Steve Prettyman Practical PHP 7, MySQL 8, and MariaDB Website Databases: A Simplified Approach to Developing Database-Driven Websites Adrian W. West Steve Prettyman Colyton, Devon, United Kingdom Key West, Florida, USA ISBN-13 (pbk): 978-1-4842-3842-4 ISBN-13 (electronic): 978-1-4842-3843-1 Library of Congress Control Number: 2018957652 Copyright © 2018 by Adrian W. West and Steve Prettyman This work is subject to copyright. 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Printed on acid-free paper Contents About the Authors�� xiii Acknowledgments��xv Introduction��xvii ■Chapter ■ 1: Create and Test a Database and Table�� 1 Defining Developer, Administrator, and User�� 2 Defining Interactive Websites�� 2 Summary�� 31 ■Chapter ■ 2: Create Web Pages That Interact with Users�� 33 Creating the Folder for Holding the Database Pages�� 34 Creating the Temporary Template�� 34 Introducing the PHP include( ) Function�� 36 The Included Header File�� 37 The Included Menu File�� 39 The Included Information Column�� 40 The Included Footer File�� 41 The Interactive Version of the Template�� 42 Connecting to the Database�� 44 The Registration Page�� 47 The PHP Keyword echo�� 58 The “Thank You” Page�� 58 Displaying Error Messages That Are Collected in an Array�� 60 iii ■ Contents Hashing the Password�� 61 Viewing Members’ Records�� 61 The View Users Page�� 61 The Change Password Page�� 65 Confirming a Successful Password Change�� 72 Testing the Tutorial’s Pages�� 72 More About Arrays�� 73 Summary�� 74 ■■Chapter 3: Create Login/Logout Functionality for Members and an Administrator�� 75 Creating the logindb Database and users Table�� 76 Removing or Replacing Redundant Menu Buttons in the Headers�� 77 Adding a Login Button to the Home Page Header�� 78 Removing Redundant Buttons from the Registration and New Password Headers�� 79 The Revised Registration Page�� 79 The New Header for the New Password Page�� 80 A New Header Menu for the Members page�� 82 Amend the Header for the “Thank You” Page�� 82 The Registration Page and Undesirable Characters�� 84 Registering Some Members�� 87 Differentiating Between Two Types of Membership�� 88 Creating User Levels to Limit Access to Private Pages�� 88 Log In�� 91 The Header for the Login Page�� 91 The Login Page�� 92 Sessions�� 99 A Members-Only Page�� 101 Planning the Administrator’s Role�� 104 A New Header for the Administration Page�� 105 iv ■ Contents Testing the Login/Logout Function�� 109 Amending and Deleting Individual Records�� 109 Summary�� 110 ■Chapter ■ 4: Create an Administration Interface�� 111 The Administration Database�� 111 The Users Table�� 113 Revising the View Users Page to Include Editing and Deleting�� 115 Displaying Pages of Records (Pagination)�� 121 Planning the Search Criteria�� 128 A Temporary Search Page for Displaying Specified Members�� 128 The Search Form�� 132 The Final Form Handler for Receiving Search Form Input�� 135 Editing Records�� 139 Deleting Records�� 145 Summary�� 150 ■Chapter ■ 5: Expand and Enrich Your Website�� 151 Creating a New Database, a Table with 15 Columns, and a Price Table�� 151 Creating the File for Connecting to the Database�� 152 Creating the Tables�� 153 Using ENUM�� 154 The Importance of Documentation�� 154 Extending the Registration Form and Adding a Pull-Down Menu�� 156 Always Announce Prices and Fee Payments Up-Front�� 157 Adding PayPal Debit/Credit Card Images�� 168 Including PayPal on the “Thank You” Page�� 168 Registering Some Members�� 173 A Small Amendment to the Login Page�� 175 Amending the Administrator’s Header�� 175 Adding Class and Paid to the admin_view_users Table�� 177 v ■ Contents Searching and Editing Records�� 181 Modifying the Form for Editing Records�� 184 Summary�� 190 ■Chapter ■ 6: Add the Finishing Touches: Security and Validation�� 191 Creating the Database�� 191 Creating the File for Connecting to the Database�� 192 Creating the users Table by Importing a SQL Dump File�� 193 Registering Some Members Manually�� 195 Adding a Title Column to the users Table�� 197 Creating the Prices Table by Importing a SQL Dump File�� 199 Tidying Up the Folders and Filing System�� 200 Degrees of Security�� 200 Adding a Layer of Security�� 200 An Increased Layer of Protection�� 202 Validation and Sanitization�� 202 The filter_var() Function�� 202 Validation�� 202 Sanitization�� 204 Validating Telephone Numbers�� 205 A Safer Registration Page�� 205 Searching for a Title, an Address, or a Telephone Number�� 221 Viewing the Retrieved Title, Address, and Phone Number�� 225 Editing the Title, Addresses, and Telephone Numbers�� 228 Summary�� 236 ■Chapter ■ 7: Migrate to a Host and Back Up Your Website Database�� 237 Making Last-Minute Changes�� 237 Creating a New Database�� 238 Allowing Members to Update Their Own Records�� 240 A Secure Feedback Form�� 254 vi ■ Contents The Feedback Form�� 255 The “Thank You” Page and the Error Messages�� 266 A Common Header�� 269 Logging Exceptions and Error�� 272 Migrating the Database and Tables to a Remote Host�� 274 A Puzzling Error Message�� 275 Creating and Exporting the SQL File�� 275 Using the GUIs on a Remote Host’s Server�� 281 Connecting to the Database on the Remote Host�� 282 Securely Uploading the mysqli_connection.php File�� 283 Uploading the Interactive Pages to the Host�� 285 Backing Up Your Database�� 286 Summary�� 286 ■Chapter ■ 8: Create a Product Catalog�� 287 Preparing the Database and Administration Plan�� 287 Creating a New Database�� 288 Creating the File for Connecting to the Database�� 289 Security�� 290 Creating a Home Page with Search Capability�� 292 The Header for the Majority of the Pages�� 293 The Home Page Code�� 294 Displaying the Catalog�� 296 The Header for the Page of Search Results�� 303 Creating the House Details Page�� 304 Creating the Admin/Adding a House Page�� 309 The Header for the Admin...
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