Fixed implicit flush.

Users can shoot themselves by their own output handler always.
Therefore, this check is overkill and it should be documented
limitation, IMO.

Anyway, a little optimization.

Fix infinite recursion bug when using zlib output compression.
Cause: the chunk size is taken from the zlib.output_compression setting,
which is 0 or 1. This causes the block_size for output

Fix infinite recursion bug when using zlib output compression.
Cause: the chunk size is taken from the zlib.output_compression setting,
which is 0 or 1. This causes the block_size for output buffer to be set
to 0 (1 / 2) and thus causes infinite recursion in php_ob_allocate().
Solution: use a value of 0 for the chunk size which will use the default
sizes. Also add a sanity check which will default the block_size to 1
if it ends up as 0.

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Fix bug #19525

Per discussion on #php.bugs (+1 from at least Derick and Jani), revert double_buffering.

Removed __output_handler as everybody seems against such implicit
behaviour. Instead supply error message.

Use zend_is_callable() instead of php_check_object_method_array() and
drop the latter. THX to Markus Fischer - i did not recognize this function.

@Expanded ob_start() to allow object par

Use zend_is_callable() instead of php_check_object_method_array() and
drop the latter. THX to Markus Fischer - i did not recognize this function.

@Expanded ob_start() to allow object parameters without methodnames and
@use default method __output_handler(). (Marcus)

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Reenable array(object,method) in ob_start()

Fix ob_gzhandler()'s handling of requests w/o compression but that do have
the Accept-Encoding header

fix warning

full decopling of size parameters of ob_start() and internal buffer handlers
#intended behaviour is now fully implemented,

Ignore double_buffering for ob_start().

Revert ob_start() defaults to 40K/10K until i find a better solution.

Changed handling of output buffer sizes.
@Added php.ini option "double_buffering" that forces an additional first
@output buffer and improved handling of buffer sizes. (Marcus)

-use of php_error_docref
-some more information in ob_get_status()

bool not boolean

Use int, not integer.

corrected handling of internal output buffers
minor fixs

Improved handling of output buffers (see news)\n#No trim for the string parameter...

Added php_ob_handler_used to check if a specific output handler is used
in c.

-New function ob_list_handlers
@- Added ob_list_handlers() which returns an array of all active output
@ handlers. (marcus)

Remove redundant code (thanks to Jani for pointing that out)

Added estrdup() needed.
Fixed typo.

We shouldn't force Content-length:, but much worse, it's wrong in many
cases (basically, unless you use output buffering to buffer all of your content,
it won't work; output buffering is use

We shouldn't force Content-length:, but much worse, it's wrong in many
cases (basically, unless you use output buffering to buffer all of your content,
it won't work; output buffering is used for lots of different things as a
functional interface, and such buffers have no relation to Content-type at
all).

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Free string before overwriting it