Detecting if ob_start is called from a callback function (bug #2733)

Hi, I've got a bug in the Var_Dump class (bug #2733 http://pear.php.net/bugs/bug.php?id=2733), and I cannot find an acceptable solution to the problem. The Var_Dump class captures the output of the var_dump function, by using output control functions (ob_start...), because this is the only way to save it in a string (as stated by the doc). But the problem is that ob_start() may not be called from a callback function, in which case it produce a fatal error : "Fatal error: ob_start(): Cannot use output buffering in output buffering display handlers in /usr/share/pear/Var_Dump.php on line 162" Putting a @ in front of ob_start does not prevent the problem, and there is no function that can help in this situation (ob_get_level give the nesting level, but does not tell if we are in an output buffering display handler). Does someone here know if there is a way to detect if ob_start is called from a callback function, or at least how to avoid the problem ? Or do I just need to specify in the Var_Dump doc that "Var_Dump::toString may not be called from a callback function. If you call it from callback function, the behavior is undefined." (extract slightly modified from http://www.php.net/manual/fr/function.ob-start.php) ? Regards, -- Frederic Poeydomenge Web : http://fpoeydomenge.free.fr/ E-mail : fpoeydomenge@free.fr GnuPG : http://fpoeydomenge.free.fr/public-key.asc

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