This function will send the contents of the topmost output buffer (if any) and turn this output buffer off. If you want to further process the buffer's contents you have to call ob_get_contents() before ob_end_flush() as the buffer contents are discarded after ob_end_flush() is called.
TRUE on success or
FALSE on failure. Reasons for failure are first that you called the
function without an active buffer or that for some reason a buffer could
not be deleted (possible for special buffer).
The following example shows an easy way to flush and end all output buffers: