DirectoryIterator

DirectoryIterator is a class in PHP that allows for iterating over directories. It provides an object-oriented interface for accessing information about files and directories within a specified path.

When a DirectoryIterator object is created, it is initialized with the path to the directory to be scanned. The iterator can then be used in a foreach loop to traverse the contents of the directory. Each iteration yields an object that represents an item within the directory, such as a file or a subdirectory.

The DirectoryIterator object provides several methods to retrieve information about the current item. For example, `getFilename()` returns the name of the file or directory, `getPathname()` returns the full path, `isDot()` checks if the item is the current or parent directory marker, and `isDir()` and `isFile()` determine if the item is a directory or a file, respectively.

Error handling is also supported. If the specified directory does not exist or is not readable, the iterator will throw an exception. This allows developers to gracefully handle such situations. DirectoryIterator can be useful for a variety of tasks, including file management, system administration scripts, and web application features that involve handling uploaded files or generating directory listings. It offers a convenient and structured way to work with file system contents in PHP.