How does file permissions impact PHP's ability to access and read files outside of the web server directory?

File permissions play a crucial role in determining PHP's ability to access and read files outside of the web server directory. If the file permissions are not set correctly, PHP may not have the necessary permissions to access files outside of its designated directory. To solve this issue, you can adjust the file permissions to allow PHP to read the desired files.

// Set file permissions to allow PHP to read files outside of the web server directory
chmod("/path/to/file", 0644);