[Tickets #9048] Accessing /dimp/compose.php generates 'headers already sent in Unknown on line 0'

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Ticket URL: http://bugs.horde.org/ticket/9048
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  Ticket             | 9048
  Created By         | Valentin.Vidic at CARNet.hr
  Summary            | Accessing /dimp/compose.php generates 'headers already
                     | sent in Unknown on line 0'
  Queue              | DIMP
  Version            | 1.1.4
  Type               | Bug
  State              | Unconfirmed
  Priority           | 1. Low
  Milestone          |
  Patch              | 1
  Owners             |
+New Attachment     | dimp_compose_ob.diff
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Valentin.Vidic at CARNet.hr (2010-05-19 10:52) wrote:

It seems this is a problem with output buffering. ob_start in  
dimp/lib/Views/Compose.php opens a new output buffer on the stack but  
then calls ob_clean instead of ob_end_clean to destroy the temporary  
buffer. From the ob_start manual:

Output buffers are stackable, that is, you may call ob_start() while  
another ob_start() is active. Just make sure that you call  
ob_end_flush()  the appropriate number of times. If multiple output  
callback functions are active, output is being filtered sequentially  
through each of them in nesting order.