What are some common pitfalls to avoid when working with file generation and manipulation in PHP?

One common pitfall to avoid when working with file generation and manipulation in PHP is not properly handling file permissions. It is important to ensure that the PHP script has the necessary permissions to create, read, write, and delete files as needed. Failure to set appropriate permissions can result in errors or security vulnerabilities.

// Set proper file permissions before creating or manipulating files
chmod('/path/to/file', 0644);