PHP Object-Oriented Solutions

By: David Powers

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Paperback | 21 August 2008

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396 Pages

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22.23 x 19.05 x 2.54

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With the surge of popularity of PHP 5, object-oriented programming is now an important consideration for PHP developers. This version-neutral book is a gentle introduction to object-oriented programming (OOP) that won't overburden you with complex theory. It teaches you the essential basics of OOP that you'll need to know before moving onto a more advanced level, and includes a series of prepackaged scripts that you can incorporate into your existing sites with the minimum of effort.

It shows how object-oriented programming can be used to create reusable and portable code by walking you through a series of simple projects. The projects feature the sorts of things developers run up against every day, and include a validator for filtering user input, a simple Date class that avoids the need to remember all the esoteric format codes in PHP, and an XML generator.

Teaches the fundamentals of OOP
Simple projects show how OOP concepts work in the real world
Prepackaged scripts can easily be added to your own projects

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Non-Fiction Computing & I.T.Computer Programming & Software Development Object-Oriented Programming or OOP Programming & Scripting Languages Software Engineering Web Programming

About the Author	p. xi
About the Technical Reviewer	p. xiii
Acknowledgments	p. xv
Introduction	p. xvii
Why Object-Oriented PHP?	p. 3
Understanding basic OOP concepts	p. 4
How OOP evolved	p. 5
Using classes and objects	p. 6
Protecting data integrity with encapsulation	p. 8
Polymorphism is the name of the game	p. 10
Extending classes through inheritance	p. 10
Deciding on a class hierarchy	p. 11
Using best practice	p. 12
How OOP has evolved in PHP	p. 13
OOP since PHP 5	p. 13
Preparing for PHP 6	p. 14
Choosing the right tools to work with PHP classes	p. 16
Using a specialized script editor	p. 16
Chapter review	p. 19
Writing PHP Classes	p. 23
Formatting code for readability	p. 25
Using the Zend Framework PHP Coding Standard	p. 25
Choosing descriptive names for clarity	p. 26
Creating classes and objects	p. 26
Defining a class	p. 27
Controlling access to properties and methods	p. 27
Quick review	p. 32
Setting default values with a constructor method	p. 33
Using inheritance to extend a class	p. 36
Defining a child class	p. 37
Accessing a parent class's methods and properties	p. 39
Using the scope resolution operator	p. 39
Controlling changes to methods and properties	p. 44
Preventing a class or method from being overridden	p. 44
Using class constants for properties	p. 46
Creating static properties and methods	p. 47
Quick review	p. 49
Loading classes automatically	p. 50
Exploring advanced OOP features	p. 51
Creating abstract classes and methods	p. 52
Simulating multiple inheritance with interfaces	p. 54
Understanding which class an object is an instance of	p. 55
Restricting acceptable data with type hinting	p. 56
Using magic methods	p. 59
Converting an object to a string	p. 60
Cloning an object	p. 60
Accessing properties automatically	p. 64
Accessing methods automatically	p. 65
Cleaning up with a destructor method	p. 66
Handling errors with exceptions	p. 67
Throwing an exception	p. 67
Catching an exception	p. 67
Extracting information from an exception	p. 68
Extending the Exception class	p. 72
Using comments to generate code hints	p. 73
Writing PHPDoc comments	p. 74
Chapter review	p. 75
Taking the Pain Out of Working with Dates	p. 77
Designing the class	p. 78
Examining the built-in date-related classes	p. 79
Using the DateTime class	p. 81
Setting the default time zone in PHP	p. 83
Examining the DateTimeZone class	p. 85
Using the DateTimeZone class	p. 87
Deciding how to extend the existing classes	p. 89
Building the class	p. 91
Creating the class file and constructor	p. 91
Resetting the time and date	p. 95
Accepting dates in common formats	p. 98
Accepting a date in MM/DD/YYYY format	p. 98
Accepting a date in DD/MM/YYYY format	p. 99
Accepting a date in MySQL format	p. 99
Outputting dates in common formats	p. 100
Outputting date parts	p. 101
Performing date-related calculations	p. 103
Adding and subtracting days or weeks	p. 105
Adding months	p. 106
Subtracting months	p. 110
Adding and subtracting years	p. 112
Calculating the number of days between two dates	p. 113
Creating a default date format	p. 114
Creating read-only properties	p. 115
Organizing and commenting the class file	p. 117
Chapter review	p. 118
Using PHP Filters to Validate User Input	p. 121
Validating input with the filter functions	p. 122
Understanding how the filter functions work	p. 123
filter_has_var()	p. 125
filter_list()	p. 126
filter_id()	p. 126
Setting filter options	p. 127
Filtering single variables	p. 130
Setting flags and options when filtering a single variable	p. 134
Filtering multiple variables	p. 136
Setting a default filter	p. 137
Building the validation class	p. 138
Deciding what the class will do	p. 138
Planning how the class will work	p. 139
Coding the validation class properties and methods	p. 140
Naming properties and defining the constructor	p. 140
Setting the input type and checking required fields	p. 142
Preventing duplicate filters from being applied to a field	p. 147
Creating the validation methods	p. 147
Creating the methods to process the tests and get the results	p. 157
Using the validation class	p. 159
Sticking to your design decisions	p. 165
Chapter review	p. 166
Building a Versatile Remote File Connector	p. 169
Designing the class	p. 171
Building the class	p. 172
Defining the constructor	p. 172
Checking the URL	p. 174
Retrieving the remote file	p. 180
Defining the accessDirect() method	p. 180
Using cURL to retrieve the remote file	p. 186
Using a socket connection to retrieve the remote file	p. 190
Handling the response headers from a socket connection	p. 196
Generating error messages based on the status code	p. 202
Final testing	p. 204
Ideas for improving the class	p. 204
Chapter review	p. 205
SimpleXML-Couldn't Be Simpler	p. 207
A quick XML primer	p. 208
What is XML?	p. 208
How XML documents are structured	p. 210
The rules of writing XML	p. 212
Using HTML entities in XML	p. 213
Inserting HTML and other code in XML	p. 213
Using SimpleXML	p. 214
Loading an XML document with SimpleXML	p. 217
Loading XML from a file	p. 217
Loading XML from a string	p. 218
Extracting data with SimpleXML	p. 220
Accessing text nodes	p. 221
Accessing attributes	p. 221
Accessing unknown nodes	p. 222
Saving and modifying XML with SimpleXML	p. 228
Outputting and saving SimpleXMLElement objects	p. 228
Modifying SimpleXMLElement objects	p. 231
Changing the values of text and attributes	p. 231
Removing nodes and values	p. 232
Adding attributes	p. 233
Adding new elements	p. 234
Using SimpleXML with namespaces	p. 235
How namespaces are used in XML	p. 236
Handling namespace prefixes in SimpleXML	p. 236
Handling namespaced attributes	p. 241
Finding out which namespaces a document uses	p. 242
Using SimpleXML with XPath	p. 244
A quick introduction to XPath	p. 244
Using XPath to drill down into XML	p. 245
Using XPath expressions for finer control	p. 246
Using XPath with namespaces	p. 247
Registering namespaces to work with XPath	p. 247
Chapter review	p. 248
Supercharged Looping with SPL	p. 251
Introducing iterators	p. 252
Using an array with SPL iterators	p. 253
Limiting the number of loops with the LimitIterator	p. 253
Using SimpleXML with an iterator	p. 255
Filtering	p. 256
Setting options for RegexIterator	p. 259
Looping sequentially through more than one set of data	p. 263
Looking ahead with the CachingIterator	p. 265
Using anonymous iterators as shorthand	p. 268
Examining files and directories	p. 269
Using DirectoryIterator	p. 270
Including subdirectories in a single operation	p. 271
Extracting file information with SplFileInfo	p. 273
Finding files of a particular type	p. 274
Reading and writing files with SplFileObject	p. 275
Extending iterators	p. 281
Understanding the Iterator interface	p. 282
Extending the FilterIterator class	p. 283
Chapter review	p. 285
Generating XML from a Database	p. 289
Designing the application	p. 290
Defining the application's purpose	p. 290
Setting the requirements	p. 292
Building the application	p. 292
Creating the database connection	p. 293
Getting the database result	p. 294
Defining the properties and constructor	p. 295
Implementing the Iterator interface	p. 296
Implementing the Countable interface	p. 298
Generating the XML output	p. 302
Defining the properties and constructor	p. 303
Setting the SQL query	p. 305
Setting the root and top-level node names	p. 305
Obtaining the primary key	p. 306
Setting output file options	p. 307
Using XMLWriter to generate the output	p. 307
Chapter review	p. 317
Case Study: Creating Your Own RSS Feed	p. 321
Understanding the RSS 2.0 format	p. 322
The structure of an RSS 2.0 feed	p. 322
What the [left angle bracket]channel[right angle bracket] element contains	p. 323
What the [left angle bracket]item[right angle bracket] elements contain	p. 325
Deciding what the feed will contain	p. 326
Building the class	p. 327
Populating the elements that describe the feed	p. 328
Populating the [left angle bracket]item[right angle bracket] elements	p. 333
Building the SQL query	p. 334
Creating the [left angle bracket]pubDate[right angle bracket] element	p. 338
Creating the [left angle bracket]link[right angle bracket] elements	p. 340
Creating helper methods to format [left angle bracket]item[right angle bracket] child elements	p. 344
Generating the XML for the [left angle bracket]item[right angle bracket] elements	p. 346
Where to go from here	p. 352
Index	p. 355
Table of Contents provided by Ingram. All Rights Reserved.

PHP Object-Oriented Solutions

At a Glance

Paperback

Shipping

How to return your order

Defective items

You Can Find This Book In

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