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Mastering phpMyAdmin 3.1 for Effective MySQL Management
Mastering phpMyAdmin 3.1 for Effective MySQL Management
Mastering phpMyAdmin 3.1 for Effective MySQL Management
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Mastering phpMyAdmin 3.1 for Effective MySQL Management

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In Detail

MySQL has gained wide popularity because of its open-source nature, performance, reliability, robustness, and support for various platforms.

phpMyAdmin is a web-based front-end to manage MySQL databases and has been adopted by a number of open-source distributors. It is one of the most widely used open-source applications written in PHP. phpMyAdmin supports a wide range of operations with MySQL. Currently, it can create and drop databases, create/drop/alter tables, delete/edit/add fields, execute any SQL statement, manage keys on fields, manage privileges, export data into various formats and is available in 52 languages. The powerful graphical interface of version 3.1 has made phpMyAdmin an indispensable tool for MySQL and web developers.

This is the first book that covers version 3.1, the latest version of phpMyAdmin. It has been fully updated from the previous version that covered phpMyAdmin Version 2.11. It is a comprehensive guide to unlocking the full potential of phpMyAdmin. It builds a solid understanding of the core capabilities of phpMyAdmin before walking you through every facet right from showing you how to set up and manage the database with clear, step-by-step instructions and screenshots to exploring the less well known and generally under-used features and capabilities of phpMyAdmin in depth. Along the way you'll build a more detailed understanding of SQL and how it works in MySQL.

Whether you are an experienced developer, system administrator, web designer or new to MySQL and phpMyAdmin, this book will show you how to increase your productivity and control when working with your MySQL.

Unlock the full potential of phpMyAdmin

Approach

The book is a step-by-step tutorial for phpMyAdmin explaining and demonstrating the potential of this tool with clear instructions and screenshots. After covering installation and basic features of phpMyAdmin it goes on to show its less well known and generally under-used features and capabilities.

Who this book is for

phpMyAdmin is a must-have tool for everyone who needs to manage their MySQL databases and tables in an effective manner. This book is a must-read for every serious phpMyAdmin user who would like to use this outstanding application to its full power.

LanguageEnglish
Release dateMar 13, 2009
ISBN9781847197870
Mastering phpMyAdmin 3.1 for Effective MySQL Management
Author

Marc Delisle

Marc Delisle was awarded "MySQL Community Member of the year 2009" because of his involvement with phpMyAdmin. He started to contribute to the project in December 1998, when he made the multi-language version. He is still involved with phpMyAdmin as a developer and project administrator. Marc is a system administrator at Cegep de Sherbrooke, Québec, Canada. He has been teaching networking, security, and web application development. In one of his classes, he was pleased to meet a phpMyAdmin user from Argentina. Marc lives in Sherbrooke with his wife and they enjoy spending time with their four children.

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    Mastering phpMyAdmin 3.1 for Effective MySQL Management - Marc Delisle

    Table of Contents

    Mastering phpMyAdmin 3.1 for Effective MySQL Management

    Credits

    About the author

    About the reviewer

    Preface

    What this book covers

    What you need for this book

    Who is this book for

    Conventions

    Reader feedback

    Customer support

    Errata

    Piracy

    Questions

    1. Introduction and Installation

    Introducing phpMyAdmin

    Web applications

    PHP and MySQL:The leading open source duo

    What is phpMyAdmin?

    phpMyAdmin features

    Installing phpMyAdmin

    Required information

    System requirements

    Downloading the files

    Installation procedure

    Installation on a remote server using a Windows client

    Installation on a local Linux server

    Installation on local Windows servers (Apache, IIS)

    Configuring phpMyAdmin

    The config.inc.php file

    Permissions on config.inc.php

    Configuration principles

    Web-based setup script

    Manual creation of config.inc.php

    Tips for editing config.inc.php on a Windows Client

    Description of some configuration parameters

    PmaAbsoluteUri

    Server-specific sections

    extension

    PersistentConnections

    connect_type, socket and port

    compress configuration

    Upgrading phpMyAdmin

    Summary

    2. Authentication and Security

    MySQL authentication

    Root user without password

    Single-user authentication using config

    Testing the connection

    Multi-user authentication

    Authentication types offered

    The control user

    Logging out

    HTTP authentication

    Cookie authentication

    Signon authentication

    Multi-server configuration

    Servers defined in the configuration file

    Arbitrary server

    Security

    Directory-level protection

    Error handling

    IP-based access control

    Rules

    Order of interpretation for rules

    Simplified rule for root access

    Restricting the list of databases

    Protecting in-transit data

    Swekey hardware authentication

    Configuration

    Usage

    Security note

    Summary

    3. Interface Overview

    Panels and windows

    Login panels

    Left and right panels

    Homepage

    Views

    Query window

    Starting page

    General customization

    Window titles configuration

    Icon configuration

    Natural sort order for database and table names

    Site-specific header and footer

    MySQL documentation links

    Themes

    Theme configuration

    Theme selection

    The color picker

    Sliders

    Character sets, collations and language

    Collations

    Unicode and UTF-8

    Language selection

    Effective character sets and collations

    Left panel (navigation)

    Logo configuration

    Database and table list

    Light mode

    Tree display of database names

    Full mode

    Table short statistics

    Table quick-access icon

    Nested display of tables within a database

    Server-list choice

    Handling many databases or tables

    Limits on the interface

    Improving fetch speed

    Right panel (main)

    Homepage

    Database view

    Table view

    Server view

    Icons for homepage and menu tabs

    Query window

    Summary

    4. First Steps

    Database creation

    No privileges?

    First database creation is authorized

    Creating our first table

    Choosing the fields

    Table creation

    Choosing keys

    Manual data insertion

    Data entry panel tuning for CHAR and VARCHAR

    Browse mode

    SQL query links

    Navigation bar

    Query results operations

    Sorting results

    Headwords

    Color-marking rows

    Limiting the length of each column

    Display options

    Browsing distinct values

    Browse-mode customization

    Creating an additional table

    Summary

    5. Changing Data

    Edit mode

    Moving to next field with the tab key

    Moving with arrows

    Handling NULL values

    Applying a function to a value

    Duplicating rows of data

    Multi-row editing

    Editing the next row

    Deleting data

    Deleting a single row

    Deleting many rows

    Deleting all the rows in a table

    Deleting all rows in many tables

    Deleting tables

    Deleting databases

    Summary

    6. Changing Table Structures

    Adding a field

    Vertical mode

    Horizontal mode

    Editing field attributes

    TEXT

    BLOB (Binary Large Object) fields

    Binary content uploads

    ENUM and SET

    DATE, DATETIME, and TIMESTAMP

    Calendar pop up

    TIMESTAMP options

    Bit

    Index management

    Single-field indexes

    Multi-field indexes and index editing

    FULLTEXT Indexes

    Table optimization—explaining a query

    Detection of index problems

    Summary

    7. Exporting Structure and Data (Backup)

    Dumps, backups, and exports

    Scope of the export

    Database exports

    The export subpanel

    SQL

    SQL options

    The Save as file subpanel

    File name template

    Compression

    Choice of character set

    Kanji support

    CSV

    CSV for MS Excel

    PDF

    Microsoft Excel 2000

    Microsoft Word 2000

    LaTeX

    XML

    Native MS Excel (pre-Excel 2000)

    Open document spreadsheet

    Open document text

    YAML

    CodeGen

    Texy! text

    Table exports

    Split-file exports

    Selective exports

    Exporting partial query results

    Exporting and checkboxes

    Multi-database exports

    Saving the export file on the server

    User-specific save directories

    Memory limits

    Summary

    8. Importing Structure and Data

    Limits for the transfer

    Time limits

    Other limits

    Partial imports

    Temporary directory

    Importing SQL files

    Importing CSV files

    Differences between SQL and CSV formats

    Exporting a test file

    CSV

    CSV using LOAD DATA

    Requirements

    Using the LOAD DATA interface

    Web server upload directories

    Summary

    9. Searching Data

    Daily usage of phpMyAdmin

    Single-table searches

    Entering the search subpage

    Search criteria by field—query by example

    Searching for empty / non-empty values

    Print view

    Wildcard search

    Case sensitivity

    Combining criteria

    Search options

    Selecting the fields to be displayed

    Ordering the results

    Applying a WHERE clause

    Obtaining distinct results

    Complete database search

    Restricting search to a column

    Summary

    10. Table and Database Operations

    Table maintenance

    Changing table attributes

    Table storage engine

    Table comments

    Table order

    Table collation

    Impact of switching connection collation

    Table options

    Renaming, moving, and copying tables

    Appending data to a table

    Multi-table operations

    Repairing an in use table

    Database operations

    Renaming a database

    Copying a database

    Summary

    11. The Relational System

    Relational MySQL

    InnoDB and PBXT

    Linked-tables infrastructure

    Goal of the infrastructure

    Location of the infrastructure

    Installing linked-tables infrastructure

    Multi-user installation

    Infrastructure and config.inc.php

    Single-user installation

    Defining relations with the relation view

    Internal relations

    Defining the relation

    Defining the display field

    Foreign key relations

    Foreign keys without linked-tables infrastructure

    Defining relations with the Designer

    Interface overview

    Defining relations

    Foreign key relations

    Defining the display field

    Exporting for PDF schema

    Benefits of the defined relations

    Foreign key information

    The drop-down list of foreign keys

    The browseable foreign-table window

    Referential integrity checks

    Automatic updates of metadata

    Column-commenting

    Automatic migration

    Summary

    12. Entering SQL Commands

    The SQL query box

    The Database view

    The Table view

    The Fields selector

    Clicking into the query box

    The Query window

    Query window options

    Session based SQL history

    Database based SQL history (permanent)

    Editing queries in the query window

    Multi-statement queries

    Pretty printing (syntax-highlighting)

    The SQL Validator

    System requirements

    Making the Validator available

    Validator results

    Standard-conforming queries

    Non-standard-conforming queries

    Summary

    13. The Multi-Table Query Generator

    Choosing tables

    Column criteria

    Field selector: Single-column or all columns

    Sorts

    Showing a column

    Updating the query

    Criteria

    Adjusting the number of criteria rows

    Adjusting the number of criteria columns

    Automatic joins

    Executing the query

    Summary

    14. Bookmarks

    Comparing bookmark and query history features

    Bookmark creation

    Creating a bookmark after a successful query

    Storing a bookmark before sending a query

    Public bookmarks

    The default initial query for a table

    Multi-query bookmarks

    Recalling from the bookmarks list

    Bookmark execution

    Bookmark manipulation

    Bookmark parameters

    Creating a parameterized bookmark

    Passing a parameter value to a bookmark

    Executing bookmarks by browsing the pma_bookmark table

    Summary

    15. System Documentation

    Structure reports

    Using print view

    The database print view

    The selective database print view

    The table print view

    The data dictionary

    Relational schema in PDF

    Adding a third table to our model

    Editing PDF pages

    Page planning

    Creating a new page

    Editing a page

    Displaying a page

    A note about fonts used

    Using the Designer for PDF layout

    Summary

    16. MIME-Based Transformations

    Display behavior in browse mode

    Display options

    Enabling transformations

    The MIME column's settings

    MIME types

    Browser transformations

    Transformation options

    Requirements for image generation

    The GD2 library

    The JPEG and PNG libraries

    Memory limits

    Examples of transformations

    Clickable thumbnail (.jpeg or .png)

    Links to an image

    Date formatting

    Links from text

    text/plain: link

    text/plain: imagelink

    Preserving the original formatting

    Displaying parts of a text

    Download link

    Hexadecimal representation

    SQL pretty printing

    IP address

    External applications

    External application example: In-cell sort

    Summary

    17. MySQL 5.0 and 5.1 Support

    Views

    Manually creating a view

    Right panel and views

    Creating a view from results

    Renaming a view

    Performance hint

    Routines—stored procedures and functions

    Creating a stored procedure

    Changing the delimiter

    Entering the procedure

    Testing the procedure

    Manipulation

    Manually creating a function

    Testing the function

    Exporting stored procedures and functions

    Triggers

    Manually creating a trigger

    Testing the trigger

    Information_schema

    Profiling

    Partitioning

    Table creation

    Operations

    Exporting

    Event scheduler

    Activating the scheduler

    Granting EVENT permission

    Creating an event

    Event manipulation

    Exporting

    BLOB streaming

    System requirements

    Configuration

    Implementation limitations in phpMyAdmin

    Creating the PBMS system tables

    Table preparation

    Uploading to BLOB repository

    Streaming the data from repository

    Changing repository data

    Summary

    18. MySQL Server Administration

    User and privileges management

    The user overview

    Privileges reload

    Adding a user

    User name

    Host

    Password

    Database creation and rights

    Global privileges

    Resource limits

    Editing a user

    Edit privileges

    Database-specific privileges

    Changing the password

    Changing login information or copying a user

    Removing a user

    Database information

    Enabling statistics

    Sorting statistics

    Checking the database privileges

    Dropping selected databases

    Server information

    Server status verification

    The general status page

    InnoDB status

    Server variables

    Server processes

    Storage engines

    Available character sets and collations

    The binary log

    Summary

    A. History of phpMyAdmin

    Early events

    Project re-launch

    Distributors

    Evolution

    GoPHP5 and the 3.x branch

    Awards

    Summary

    B. Troubleshooting and Support

    System requirements

    Base configuration

    Solving common errors

    Error messages

    Cannot load MySQL extension

    #2003 - Can't connect to MySQL server

    Socket problem (Linux/UNIX)

    Named pipe problem (Windows)

    MySQL said: Access denied

    When using http authentication

    When using http, cookie, or config authentication

    Access denied ... using password: NO

    Access denied ... using password: YES

    Warning: cannot add header information

    MySQL said: Error 127, Table Must Be Repaired

    BLOB column used in key specification without a key length

    IIS: No Input File Specified

    A 404: page not found error when modifying a row

    Other problems

    Blank page or weird characters

    Not being able to create a database

    Problems importing large files or uploading large BLOB files

    MySQL root password lost

    Duplicate field names when creating a table

    Authentication window displayed more than once

    Column size changed by phpMyAdmin

    Seeing many databases that are not ours

    Not being able to store a value greater than 127

    Seeking support

    FAQs

    Help forums

    Creating a SourceForge account

    Choosing the thread title

    Reading the answers

    Support tracker

    Bug tracker

    Environment description

    Bug description

    Contributing to the project

    The code base

    Translation updates

    Patches

    Future phpMyAdmin versio]ns

    Summary

    Index

    Mastering phpMyAdmin 3.1 for Effective MySQL Management

    Marc Delisle


    Mastering phpMyAdmin 3.1 for Effective MySQL Management

    Copyright © 2009 Packt Publishing

    All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

    Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, Packt Publishing, nor its dealers or distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

    Packt Publishing has endeavored to provide trademark information about all the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

    First published: March 2009

    Production Reference: 1050309

    Published by Packt Publishing Ltd. 32 Lincoln Road Olton Birmingham, B27 6PA, UK.

    ISBN 978-1-847197-86-3

    www.packtpub.com

    Cover Image by Marc Delisle (< Marc.Delisle@cegepsherbrooke.qc.ca>)

    Credits

    Author

    Marc Delisle

    Reviewer

    Kai Oswald Seidler

    Acquisition Editor

    Shilpa Dube

    Development Editor

    Shilpa Dube

    Technical Editor

    Gaurav Datar

    Copy Editor

    Sumathi Sridhar

    Indexer

    Rekha Nair

    Production Editorial Manager

    Abhijeet Deobhakta

    Editorial Team Leader

    Akshara Aware

    Project Team Leader

    Lata Basantani

    Project Coordinator

    Rajashree Hamine

    Proofreaders

    Mark Reardon

    Joel T. Johnson

    Production Coordinator

    Rajni R. Thorat

    Cover Work

    Rajni R. Thorat

    About the author

    Marc Delisle, owing to his involvement with phpMyAdmin, is a member of the MySQL Developers Guild that regroups community developers. He began contributing to this popular MySQL web interface in December 1998, when he made its first multi-language version. As a developer and project administrator, he has been actively involved with this software project since 2001.

    Since 1980 Marc has worked at Cegep de Sherbrooke, Québec, Canada, as an application programmer and network manager. He has also been teaching networking, security, and PHP/MySQL application development. In one of his classes, he was pleased to meet a phpMyAdmin user from Argentina. Marc lives in Sherbrooke with his wife, and they enjoy spending time with their four children.

    This book is an update to Marc's first book on phpMyAdmin, published by Packt Publishing in 2004, followed by Creating your MySQL Database: Practical Design Tips and Techniques, also by Packt Publishing.

    I am truly grateful to Louay Fatoohi, who approached me for this book project, and to the Packt team whose sound comments were greatly appreciated during production. My thanks also go to Garvin Hicking, Alexander Marcus Turek, and Kai 'Oswald' Seidler—the reviewers for the successive editions of this book. Their sharp eyes helped in making this book clearer and more complete.

    Finally, I wish to thank all contributors to phpMyAdmin's source code, translations, and documentation. The time they gave to this project still inspires me and continues to push me forward.

    About the reviewer

    Kai Oswald Seidler was born in Hamburg in 1970. He graduated from the Technical University of Berlin with a Diplom-Informatiker degree (the equivalent of a Master of Science degree) in Computer Science. In the '90s, he created and managed Germany's biggest IRCnet server—irc.fu-berlin.de, and co-managed one of the world's largest anonymous FTP servers—ftp.cs.tu-berlin.de.

    He set up his first professional public web server in 1993. From 1993 to 1998, he was a member of Projektgruppe Kulturraum Internet—a research project on net culture and network organization. In 2002, he co-founded Apache Friends and created the multi-platform Apache web server bundle XAMPP. Around 2005, XAMPP became the most popular Apache stack worldwide.

    In 2006, his third book, Das XAMPP-Handbuch, was published by Addison Wesley.

    To Carole, André, Corinne, Annie, and Guillaume, with all my love.

    Preface

    Providing a powerful graphical interface for managing MySQL, phpMyAdmin is one of the most popular open source applications. While most developers use routine features of phpMyAdmin every day, few are aware of the power and potential its advanced features have. This book builds a solid understanding of the core capabilities of phpMyAdmin, and then walks you through every facet of this legendary tool.

    Used by millions of developers, MySQL is the most popular open source database. It supports numerous large, dynamic websites and applications. MySQL has acquired this wide popularity by virtue of its open source nature, performance, reliability, robustness, and support for multiple platforms. However, this popularity has also been helped by the existence of phpMyAdmin—the industry standard administration tool that makes database management easy for both, the experienced developer and the novice one.

    Bringing a web interface to MySQL has made phpMyAdmin an indispensable tool for MySQL and web developers, be they professionals or in the classroom. Every user can benefit from phpMyAdmin, by unlocking the full potential of this powerful application.

    What this book covers

    Chapter 1 gives us the reasons why we should use phpMyAdmin as a means of developing web applications. It then covers the downloading and installation procedures for phpMyAdmin.

    Chapter 2 provides an overview of various authentication types used in MySQL. It then covers the security issues related to phpMyAdmin installation.

    Chapter 3 gives us an overview of the phpMyAdmin interface. It includes the login panel, the left and the right panel including the Light and the Full mode, and the Query window.

    Chapter 4 is all about database creation. It teaches us how to create a table, how to insert data manually, and how to sort the data.

    Chapter 5 covers the aspects of data editing in phpMyAdmin. It teaches us handling NULL values, multi-row editing. Finally, it covers an important aspect of any database tool—data deletion.

    Chapter 6 explores the subject of changing the structure of tables. Its primary focus is on editing field attributes and index management.

    Chapter 7 deals with backups and exports. It lists various ways to trigger an export, available export formats, the options associated with export formats, and the various places where the export files may be sent.

    Chapter 8 tells us how to bring back exported data created for backup and transfer purposes. It provides an overview of the various options available in phpMyAdmin to import data, and different mechanisms involved in importing SQL and CSV files. Finally, it covers the limitations that may be faced while importing files, and the ways to overcome them.

    Chapter 9 presents the mechanisms that are useful for searching data effectively.

    Chapter 10 covers ways to perform some operations that influence and can be performed on entire tables or databases as a whole. Finally, it deals with table maintenance operations for table repair and optimization.

    Chapter 11 is where we start covering advanced features of phpMyAdmin. The chapter explains how to define inter-table relations. It also explains how to install the linked-tables infrastructure—a prerequisite for the advanced features.

    Chapter 12 helps us enter our own SQL commands. The chapter also gives us an overview of Query window—the window used to edit an SQL query. Finally, it also helps us to obtain the history of typed commands.

    Chapter 13 covers the multi-table query generator, which allows us to produce multi-table queries without actually typing them.

    Chapter 14 covers Bookmarks—one of the features of the linked-tables infrastructure. It covers how to record bookmarks and how to manipulate them. Finally, it covers passing parameters to bookmarks, and executing bookmarks directly from the pma_bookmark table.

    Chapter 15 gives an overview of how to produce documentation, which explains the structure of the databases, using the tools offered by phpMyAdmin.

    Chapter 16 explains how to apply transformations to the data in order to customize its format at view time.

    Chapter 17 covers phpMyAdmin's support for the MySQL features that are new in versions 5.0 and 5.1.

    Chapter 18 is about the administration of a MySQL server, focusing on the management of user accounts and privileges. The chapter discusses how a system administrator can use phpMyAdmin's server management features for day-to-day user account maintenance, server verification, and server protection.

    Appendix A provides a history of the phpMyAdmin project, from its roots back in 1998 through the project re-launch in 2001, and its subsequent evolution.

    Appendix B explains how to troubleshoot phpMyAdmin by examining some of its error messages, and proposing appropriate solutions. It also explains how to interact with the development team for support, bug reports, and contributions.

    What you need for this book

    You need to have access to a server or workstation that has the following installed:

    MySQL version 5.0 or newer

    PHP version 5.0 or newer

    Web server software with PHP support (this book explains phpMyAdmin's installation on Apache and IIS)

    Who is this book for

    phpMyAdmin is a must have tool for everyone who needs to manage their MySQL databases and tables in an effective manner. This book is a must read for every serious phpMyAdmin user who would like to use this outstanding application to its fullest potential.

    Conventions

    In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

    Code words in text are shown as follows: If we are using the config authentication type, no login panel is displayed.

    A block of code will be set as follows:

    $cfg['MySQLManualBase'] = 'http://www.mysql.com/doc/en';

    $cfg['MySQLManualType'] = 'searchable';

    When we wish to draw your attention to a particular part of a code block, the relevant lines or items will be shown in bold:

    $cfg['Servers'][$i]['AllowDeny']['order'] = 'allow,deny';

    Any command-line input or output is written as follows:

    tar -xzvf phpMyAdmin-3.1.1-all-languages.tar.gz

    New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in our text like this: The Home link from the left panel is used to display this page.

    Note

    Warnings or important notes appear in a box like this.

    Tip

    Tips and tricks appear like this.

    Reader feedback

    Feedback from our readers is always welcome. Let us know what you think about this book—what you liked or may have disliked. Reader feedback is important for us to develop titles that you really get the most out of.

    To send us general feedback, simply drop an email to <feedback@packtpub.com>, and mention the book title in the subject of your message.

    If there is a book that you need and would like to see us publish, please send us a note in the SUGGEST A TITLE form on www.packtpub.com or email .

    If there is a topic that you have expertise in and you are interested in either writing or contributing to a book, see our author guide on www.packtpub.com/authors.

    Customer support

    Now that you are the proud owner of a Packt book, we have a number of things to help you to get the most from your purchase.

    Errata

    Although we have taken every care to ensure the accuracy of our contents, mistakes do happen. If you find a mistake in one of our books—maybe a mistake in text or code—we would be grateful if you would report this to us. By doing so, you can save other readers from frustration, and help us to improve subsequent versions of this book. If you find any errata, please report them by visiting http://www.packtpub.com/support, selecting your book, clicking on the let us know link, and entering the details of your errata. Once your errata are verified, your submission will be accepted and the errata added to any list of existing errata. Any existing errata can be viewed by selecting your title from http://www.packtpub.com/support.

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    Please contact us at <copyright@packtpub.com> with a link to the suspected pirated material.

    We appreciate your help in protecting our authors, and our ability to bring you valuable content.

    Questions

    You can contact us at <questions@packtpub.com> if you are having a problem with any aspect of the book, and

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