/**
* @method OC_Shorty_Tools::ob_control
* @param bool on: Wether to activate or deactivate the buffer
* @return NULL|string: NULL when starting buffering, buffered content when stopping buffering
* @access public
* @author Christian Reiner
*/
static function ob_control ( $on=TRUE )
{
$output = NULL; @ob_implicit_flush ( FALSE );
@ob_start ( );
self::$ob_active = TRUE;
if ( self::$ob_usage )
{
// attempt to use outpout buffering
if ( $on )
{
// start buffering if possible and not yet started before
if ( function_exists('ob_start') // output buffers installed at all ?
&& ! self::$ob_active ) // don't stack buffers (create buffer only, if not yet started)
{
@ob_implicit_flush ( FALSE );
@ob_start ( );
self::$ob_active = TRUE;
}
} // if $on==TRUE
else
{
// end buffering _if_ it has been started before
if ( self::$ob_active )
{
$output = @ob_get_contents ( );
@ob_end_clean ( );
self::$ob_active = FALSE;
}
} // if $on==FALSE
} // if ob_usage
return $output;
} // function ob_control
