How can the PHP code provided be modified to prevent the "Permission denied" error?

The "Permission denied" error occurs when the PHP script does not have the necessary permissions to write to the specified file or directory. To prevent this error, you can ensure that the file or directory has the correct permissions set to allow the PHP script to write to it. This can be done by changing the permissions of the file or directory using chmod or chown commands in the terminal.

// Modify file permissions to prevent "Permission denied" error
chmod("path/to/file.txt", 0644);