Working with Directories
Now that you can test, read, and write to files, let's turn our attention to directories. PHP provides many functions for working with directories. Let's look at how to create, remove, and read them.
Creating Directories with mkdir()
The mkdir() function enables you to create a directory. The mkdir() function requires a string that represents the path to the directory you want to create, and an octal number integer that represents the mode you want to set for the directory. You specify an octal (base 8) number with a leading 0. The mode argument has an effect only on Unix systems. The mode should consist of three numbers between 0 and 7, representing permissions for the directory owner, group, and everyone, respectively. ...