Bug #64977 [Ana]: ob_start() fails when passed default parameters

Edit report at https://bugs.php.net/bug.php?id=64977&edit=1 ID: 64977 Updated by: mike@php.net Reported by: rewilliams at newtekemail dot com Summary: ob_start() fails when passed default parameters Status: Analyzed Type: Bug -Package: Scripting Engine problem +Package: Documentation problem PHP Version: 5.5.0RC2 Block user comment: N Private report: N New Comment: This is about correct. We missed to document the new flags parameter including available constants for 5.4+ So: PHP_OUTPUT_HANDLER_REMOVABLE: whether ob_end_*() can be called PHP_OUTPUT_HANDLER_CLEANABLE: whether ob_*_clean() can be called PHP_OUTPUT_HANDLER_FLUSHABLE: whether ob_flush() can be called PHP_OUTPUT_HANDLER_STDFLAGS: all above OR'ed together On another note: the "del" status array element is never set in 5.4+, the flags entry will contain PHP_OUTPUT_HANDLER_REMOVABLE if it's deletable. Previous Comments: ------------------------------------------------------------------------ [2013-08-06 03:15:38] kubo at iteman dot jp > This is more like a documentation bug. There is a bunch of constants > undocumented http://lxr.php.net/xref/PHP_5_4/main/output.c#204 > . Also the third > ob_start() argument can be not only true/false, you can pass various flags > there. As such, if you change your first line > ob_start(null, 0, PHP_OUTPUT_HANDLER_REMOVABLE) > no warnings will be to see. It works. But the "del" entry for ob_get_status() is never set with the default value or the built-in constants on PHP 5.4. The "del" entry is always set on PHP 5.3. ------------------------------------------------------------------------ [2013-06-06 08:20:57] ab@php.net This is more like a documentation bug. There is a bunch of constants undocumented http://lxr.php.net/xref/PHP_5_4/main/output.c#204 . Also the third ob_start() argument can be not only true/false, you can pass various flags there. As such, if you change your first line ob_start(null, 0, PHP_OUTPUT_HANDLER_REMOVABLE) no warnings will be to see. Please change this bug to be a documentation one. Or you could even fix the docs. ------------------------------------------------------------------------ [2013-06-05 20:03:11] rewilliams at newtekemail dot com Description: ------------ Calling ob_start() with explicit parameters that match the defaults (using null to get past the first one, as documented), the various functions to end output buffering generate notices, which are also added to the buffered content. For example, ob_get_clean() returns the following: ob_get_clean(): failed to discard buffer of default output handler [...] ob_get_clean(): failed to delete buffer of default output handler (0) in [...] It looks like output is spit out just as though buffering were not enabled, *and* the buffer gets saved - albeit with the buffering-related notices mixed in. Testing at <http://sandbox.onlinephpfunctions.com>, it appears the bug was introduced in 5.4 (it works in 5.3.23) and continues through the latest version of 5.5. Test script: --------------- <?php ob_start(null, 0, true); echo 'hello world'; $foo = ob_get_clean(); var_dump($foo) ?> Expected result: ---------------- string(11) "hello world" Actual result: -------------- PHP Notice: ob_get_clean(): failed to discard buffer of default output handler (0) in [...] on line 5 PHP Notice: ob_get_clean(): failed to delete buffer of default output handler (0) in [...] on line 5 hello world Notice: ob_get_clean(): failed to discard buffer of default output handler (0) in [...] on line 5 Notice: ob_get_clean(): failed to delete buffer of default output handler (0) in [...] on line 5 string(11) "hello world" ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=64977&edit=1