php man page for ob_end_flush

OB_END_FLUSH(3) 							 1							   OB_END_FLUSH(3)

ob_end_flush - Flush (send) the output buffer and turn off output buffering

SYNOPSIS
       bool ob_end_flush (void	)

DESCRIPTION
	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(3) before ob_end_flush(3) as the buffer contents are discarded after ob_end_flush(3)
       is called.

	The  output  buffer  must  be  started	by ob_start(3) with PHP_OUTPUT_HANDLER_FLUSHABLE and PHP_OUTPUT_HANDLER_REMOVABLE flags. Otherwise
       ob_end_flush(3) will not work.

       Note

	       This function is similar to ob_get_flush(3), except that ob_get_flush(3) returns the buffer as a string.

RETURN VALUES
	Returns 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).

ERRORS
/EXCEPTIONS
	If the function fails it generates an E_NOTICE.

EXAMPLES
       Example #1

	      ob_end_flush(3) example

	       The following example shows an easy way to flush and end all output buffers:

	      <?php
		while (@ob_end_flush());
	      ?>

SEE ALSO
       ob_start(3), ob_get_contents(3), ob_get_flush(3), ob_flush(3), ob_end_clean(3).

PHP Documentation Group 													   OB_END_FLUSH(3)