A common practice in PHP file handling is to always close the file after you're done writing to it using the fclose() function to free up ______.

In PHP, it is a good practice to close the file after you have finished writing to it using the fclose() function. This ensures that the file resources are released and any buffers are flushed. It helps prevent resource leaks and ensures proper cleanup. By closing the file, you free up resources and make them available for other operations.