Learning PHP 5

Any interested, intelligent, but not necessarily technical person with a web site to customize will appreciate this tutorial. With Learning PHP 5, page designers can communicate better with their developer co- workers. Those who know JavaScript can build server-side programs that complement their client-side code. And bloggers can easily add dynamic features to their site. Most of the book's chapters end with exercises, making this an excellent textbook for an introductory class on web programming.

is an independent software development and strategic technology consultant. He was a co-founder and the Chief Technology Officer of Student.Com and TVGrid.Com. At both companies, David oversaw the architecture and development of varied systems to deliver personalized dynamic content to users around the world. After discovering PHP as a solution to his web programming needs in 1996, he created the PX (http://px.sklar.com/), which enables PHP users to exchange programs. Since then, he has continued to rely on PHP for personal and professional projects. When away from the computer, David eats mini-donuts, plays records, and likes to cook. He lives in New York City and has a degree in Computer Science from Yale University.

Preface

xi

1. Orientation and First Steps

1

(15)

PHP's Place in the Web World

1

(3)

What's So Great About PHP?

4

(2)

PHP in Action

6

(5)

Basic Rules of PHP Programs

11

(4)

Chapter Summary

15

(1)

2. Working with Text and Numbers

16

(17)

Text

16

(9)

Numbers

25

(2)

Variables

27

(4)

Chapter Summary

31

(1)

Exercises

32

(1)

3. Making Decisions and Repeating Yourself

33

(15)

Understanding true and false

34

(1)

Making Decisions

35

(2)

Building Complicated Decisions

37

(6)

Repeating Yourself

43

(3)

Chapter Summary

46

(1)

Exercises

46

(2)

4. Working with Arrays

48

(21)

Array Basics

48

(4)

Looping Through Arrays

52

(5)

Modifying Arrays

57

(3)

Sorting Arrays

60

(3)

Using Multidimensional Arrays

63

(3)

Chapter Summary

66

(1)

Exercises

67

(2)

5. Functions

69

(15)

Declaring and Calling Functions

70

(1)

Passing Arguments to Functions

71

(3)

Returning Values from Functions

74

(4)

Understanding Variable Scope

78

(4)

Chapter Summary

82

(1)

Exercises

82

(2)

6. Making Web Forms

84

(30)

Accessing Form Parameters

88

(2)

Form Processing with Functions

90

(3)

Validating Data

93

(10)

Displaying Default Values

103

(2)

Putting It All Together

105

(7)

Chapter Summary

112

(1)

Exercises

112

(2)

7. Storing Information with Databases

114

(37)

Organizing Data in a Database

115

(2)

Connecting to a Database Program

117

(2)

Creating a Table

119

(2)

Putting Data into the Database

121

(5)

Inserting Form Data Safely

126

(1)

Generating Unique IDs

127

(1)

A Complete Data Insertion Form

128

(3)

Retrieving Data from the Database

131

(5)

Changing the Format of Retrieved Rows

136

(2)

Retrieving Form Data Safely

138

(3)

A Complete Data Retrieval Form

141

(4)

MySQL Without PEAR DB

145

(3)

Chapter Summary

148

(1)

Excrcises

149

(2)

8. Remembering Users with Cookies and Sessions

151

(19)

Working with Cookies

152

(4)

Activating Sessions

156

(1)

Storing and Retrieving Information

157

(3)

Configuring Sessions

160

(1)

Login and User Identification

161

(6)

Why setcookie() and session start() Want to Be at the Top of the Page

167

(1)

Chapter Summary

168

(1)

Exercises

169

(1)

9. Handling Dates and Times

170

(22)

Displaying the Date or Time

170

(5)

Parsing a Date or Time

175

(1)

Dates and Times in Forms

176

(10)

Displaying a Calendar

186

(4)

Chapter Summary

190

(1)

Exercises

190

(2)

10. Working with Files

192

(18)

Understanding File Permissions

192

(1)

Reading and Writing Entire Files

193

(4)

Reading and Writing Parts of Files

197

(3)

Working with CSV Files

200

(3)

Inspecting File Permissions

203

(1)

Checking for Errors

204

(2)

Sanitizing Externally Supplied Filenames

206

(2)

Chapter Summary

208

(1)

Exercises

208

(2)

11. Parsing and Generating XML

210

(11)

Parsing an XML Document

211

(6)

Generating an XML Document

217

(2)

Chapter Summary

219

(1)

Exercises

219

(2)

12. Debugging

221

(11)

Controlling Where Errors Appear

221

(1)

Fixing Parse Errors

222

(4)

Inspecting Program Data

226

(3)

Fixing Database Errors

229

(1)

Chapter Summary

230

(1)

Exercises

230

(2)

13. What Else Can You Do with PHP?

232

(23)

Graphics

232

(1)

PDF

233

(1)

Shockwave/Flash

234

(2)

Browser-Specific Code

236

(1)

Sending and Receiving Mail

236

(1)

Uploading Files in Forms

237

(2)

The HTML_QuickForm Form-Handling Framework

239

(3)

Classes and Objects

242

(2)

Advanced XML Processing

244

(3)

SQLite

247

(1)

Running Shell Commands

248

(1)

Advanced Math

249

(1)

Encryption

250

(1)

Talking to Other Languages

251

(1)

IMAP, POP3, and NNTP

251

(2)

Command-Line PHP

253

(1)

PHP-GTK

253

(1)

Even More Things You Can Do with PHP

254

(1)

A. Installing and Configuring the PHP Interpreter

255

(25)

B. Regular Expression Basics

280

(16)

C. Answers To Exercises

296

(39)

Index

335

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Summary

Author Biography

Table of Contents

Supplemental Materials