SAMS Teach Yourself PHP4 in 24 Hours (Teach Yourself -- 24 Hours)

Hour 1: PHP: From Home Page to Portal......Page 22
Hour 2: Installing PHP......Page 29
Installing PHP4 for Linux and Apache......Page 30
Hour 3: A First Script......Page 40
Variables......Page 49
Dynamic Variables......Page 50
References to Variables......Page 52
Data Types......Page 53
Operators and Expressions......Page 58
Constants......Page 66
The if Statement......Page 70
The switch Statement......Page 75
The while Statement......Page 78
The do..while Statement......Page 79
The for Statement......Page 80
What Is a Function?......Page 88
Defining a Function......Page 90
Returning Values from User-Defined Functions......Page 92
Dynamic Function Calls......Page 93
Variable Scope......Page 94
More About Arguments......Page 100
What Is an Array?......Page 108
Creating Arrays......Page 109
Multidimensional Arrays......Page 112
Accessing Arrays......Page 113
Manipulating Arrays......Page 118
Sorting Arrays......Page 122
What Is an Object?......Page 126
Creating an Object......Page 127
Object Properties......Page 128
Object Methods......Page 129
An Example......Page 132
Inheritance......Page 140
Inheritance: An Example......Page 144
Global and Environment Variables......Page 154
Accessing Input from Multiple SELECT Elements......Page 157
Accessing All the Fields from a Form in an Associative Array......Page 159
Distinguishing Between GET and POST Transactions......Page 161
Using Hidden Fields to Save State......Page 165
Redirecting the User......Page 167
File Upload Forms and Scripts......Page 169
Including Files with include()......Page 175
Testing Files......Page 178
Opening a File for Writing, Reading, or Appending......Page 183
Reading from Files......Page 184
Writing or Appending to a File......Page 189
Hour 11: Working with the DBM Functions......Page 196
A (Very) Brief Introduction to SQL......Page 213
Connecting to the Database Server......Page 214
Finding Out About Errors......Page 215
Adding Data to a Table......Page 216
Acquiring the Value of an Automatically Incremented Field......Page 220
Accessing Information......Page 221
Changing Data......Page 225
Getting Information About Databases......Page 227
Hour 13: Beyond the Box......Page 235
Getting a Document from a Remote Address......Page 243
Converting IP Addresses and Hostnames......Page 244
Making a Network Connection......Page 245
Sending Mail with the mail() Function......Page 252
Creating and Outputting Images......Page 256
Acquiring Color......Page 257
Applying Color Fills......Page 259
Drawing an Arc......Page 260
Drawing a Rectangle......Page 261
Drawing a Polygon......Page 262
Making a Color Transparent......Page 263
Working with Text......Page 264
Bringing It Together......Page 270
Getting the Date with time()......Page 277
Converting a Time Stamp with getdate()......Page 278
Converting a Time Stamp with date()......Page 279
Creating Time Stamps with......Page 282
Hour 16: Working with Data......Page 294
Formatting Strings......Page 313
Investigating Strings......Page 323
Manipulating Strings......Page 328
POSIX Regular Expression Functions......Page 334
Perl Compatible Regular Expressions (PCREs)......Page 343
Cookies......Page 356
The Anatomy of a Cookie......Page 357
Setting a Cookie with PHP......Page 358
Working with the Query String......Page 369
Creating a Query String......Page 370
What Are Session Functions?......Page 375
Starting a Session with session_start()......Page 376
Working with Session Variables......Page 377
Destroying Sessions and Unsetting Variables......Page 382
Passing Session IDs in the Query String......Page 383
Encoding and Decoding Session Variables......Page 384
Checking that a Session Variable Is Registered......Page 385
Hour 21: Working with the Server Environment......Page 388
Getting Information About PHP and Your Script......Page 401
Viewing Source with Syntax Coloring......Page 405
PHP Error Messages......Page 407
Writing Error Messages to a Log File......Page 410
Manual Debugging......Page 412
Common Errors......Page 414
Hour 23: An Example (Part 1)......Page 418
Hour 24: An Example (Part 2)......Page 457