Page 367 - Beginning PHP 5.3

Chapter 11: Working with Files and Directories

Figure 11-5

Examining the Editor Code

The text editor demonstrates many of the functions you ’ ve learned in this chapter, and also illustrates
some useful coding techniques. In the following sections you explore the workings of each part of the
text editor script, and take a look at how the parts fit together to make the application work.

The Main Logic
The script kicks off by defining the path to the folder that will hold the text files. It does this using a
constant called PATH_TO_FILES :

define( “PATH_TO_FILES”, “/home/matt/sandbox” );

The user will create and edit all his text files in this folder. For security reasons it ’ s important to make
sure that the user isn ’ t allowed to create or modify files outside this folder, and you see how this is done
in a moment.

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