Difference between ob_get_clean and ob_get_flush

ob_get_clean() removes the buffer (without printing it), and returns its content.

ob_get_flush() prints the buffer, removes it, and returns its content.

Both function will terminate the buffer.

ob_get_clean will just return the contents of the buffer and assign it to whatever variable you want it to, but it will not output anything.

ob_get_flush on the other hand, does everything that ob_get_clean does, but it also outputs the content.