How to Recursively List Files in a Directory Using PHP?

Recursive Directory and File Walker

This article presents a solution in PHP for recursively traversing a directory, listing all its folders, subfolders, and files.

Problem:

Envision a complex file system organized as follows:

<br>Main Dir<br> Dir1<br>  SubDir1<br>   File1<br>   File2<br>  SubDir2<br>   File3<br>   File4<br> Dir2<br>  SubDir3<br>   File5<br>   File6<br>  SubDir4<br>   File7<br>   File8<br>

The goal is to generate a listing of all files within each folder.

PHP Recursive Function:

Our solution involves a recursive PHP function, listFolderFiles(), that traverses the directory structure. It initializes by scanning the specified directory, excluding hidden directories (.) and parent directories (..). It then iterates through the remaining entries:

1. If the entry is a directory, the function recursively calls itself to explore the subdirectory.
2. If the entry is a file, it's displayed in the HTML list (which can be easily modified for other purposes).

Example Usage:

To list all files in the given directory structure, call listFolderFiles('Main Dir'). The output will be an ordered list of all files in each directory.

Conclusion:

The listFolderFiles() function provides a simple yet effective means for recursively exploring file systems and generating a hierarchical listing of all files contained within. It proves useful for various tasks, such as file management and inventory creation.

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