note 109604 added to function.popen

fread is blocking on streams from popen. That means that if you do $stream = popen("tail -f myfile"); fread($stream, 100); then fread will only return full chunks of 100 characters. So if the size of myfile isn't a multiple of 100, the last chunk will not be returned. This is documented in https://bugs.php.net/bug.php?id=51056 . Some people in that bug discussion argue that this should be kept to not change behaviour, but example #3 on http://dk.php.net/fread clearly says "When reading from anything that is not a regular local file, such as streams returned when reading remote files or from popen() and fsockopen(), reading will stop after a packet is available." A workaround is to call stream_set_blocking($stream, 0); on the stream you get from popen(). ---- Server IP: 195.184.96.15 Probable Submitter: 95.166.216.227 ---- Manual Page -- http://www.php.net/manual/en/function.popen.php Edit -- https://master.php.net/note/edit/109604 Del: integrated -- https://master.php.net/note/delete/109604/integrated Del: useless -- https://master.php.net/note/delete/109604/useless Del: bad code -- https://master.php.net/note/delete/109604/bad+code Del: spam -- https://master.php.net/note/delete/109604/spam Del: non-english -- https://master.php.net/note/delete/109604/non-english Del: in docs -- https://master.php.net/note/delete/109604/in+docs Del: other reasons-- https://master.php.net/note/delete/109604 Reject -- https://master.php.net/note/reject/109604 Search -- https://master.php.net/manage/user-notes.php