note 85823 added to function.ob-start

There is a difference between the documentation and real callback functions invocation. Manual says: "The function will be called when ob_end_flush() is called, or when the output buffer is flushed to the browser at the end of the request." Actually, the callback function, once set by ob_start(), will be called regardless. Here are the functions that invoke callback function immediately: ob_clean ob_end_clean ob_end_flush ob_flush ob_get_clean BUT only two of them return the result returned by the callback (ob_end_flush, ob_flush), other functions discard it. At the end of the request, even if none of the functions listed above is called, the callback will be called anyway, and its result will be returned to the browser (well, at least this is corresponding to the manual). There is one more trick: If you set callback function with chunk_size > 1, callback function will be called each time output buffer is equal or exceeds chunk_size and its result will be output to the browser, even if you call any of ob_clean(), ob_end_clean(), ob_get_clean() later, so be aware of this fact. ---- Server IP: 91.189.86.54 Probable Submitter: 89.222.212.81 (proxied: 89.222.212.81) ---- Manual Page -- http://www.php.net/manual/en/function.ob-start.php Edit -- https://master.php.net/note/edit/85823 Del: integrated -- https://master.php.net/note/delete/85823/integrated Del: useless -- https://master.php.net/note/delete/85823/useless Del: bad code -- https://master.php.net/note/delete/85823/bad+code Del: spam -- https://master.php.net/note/delete/85823/spam Del: non-english -- https://master.php.net/note/delete/85823/non-english Del: in docs -- https://master.php.net/note/delete/85823/in+docs Del: other reasons-- https://master.php.net/note/delete/85823 Reject -- https://master.php.net/note/reject/85823 Search -- https://master.php.net/manage/user-notes.php