note 107856 added to function.proc-open

The call works as should. No bugs. But. In most cases you won't able to work with pipes in blocking mode. When your output pipe (process' input one, $pipes[0]) is blocking, there is a case, when you and the process are blocked on output. When your input pipe (process' output one, $pipes[1]) is blocking, there is a case, when you and the process both are blocked on own input. So you should switch pipes into NONBLOCKING mode (stream_set_blocking). Then, there is a case, when you're not able to read anything (fread($pipes[1],...) == "") either write (fwrite($pipes[0],...) == 0). In this case, you better check the process is alive (proc_get_status) and if it still is - wait for some time (stream_select). The situation is truly asynchronous, the process may be busy working, processing your data. Using shell effectively makes not possible to know whether the command is exists - proc_open always returns valid resource. You may even write some data into it (into shell, actually). But eventually it will terminate, so check the process status regularly. I would advice not using mkfifo-pipes, because filesystem fifo-pipe (mkfifo) blocks open/fopen call (!!!) until somebody opens other side (unix-related behavior). In case the pipe is opened not by shell and the command is crashed or is not exists you will be blocked forever. ---- Server IP: 195.54.192.44 Probable Submitter: 188.124.232.155 ---- Manual Page -- http://www.php.net/manual/en/function.proc-open.php Edit -- https://master.php.net/note/edit/107856 Del: integrated -- https://master.php.net/note/delete/107856/integrated Del: useless -- https://master.php.net/note/delete/107856/useless Del: bad code -- https://master.php.net/note/delete/107856/bad+code Del: spam -- https://master.php.net/note/delete/107856/spam Del: non-english -- https://master.php.net/note/delete/107856/non-english Del: in docs -- https://master.php.net/note/delete/107856/in+docs Del: other reasons-- https://master.php.net/note/delete/107856 Reject -- https://master.php.net/note/reject/107856 Search -- https://master.php.net/manage/user-notes.php