note 102239 added to function.proc-open

If you are, like me, tired of the buggy way proc_open handles streams and exit codes; this example demonstrate the power of pcntl, posix and some simple output redirection: <?php $outpipe = '/tmp/outpipe'; $inpipe = '/tmp/inpipe'; posix_mkfifo($inpipe, 0600); posix_mkfifo($outpipe, 0600); $pid = pcntl_fork(); //parent if($pid) { $in = fopen($inpipe, 'w'); fwrite($in, "A message for the inpipe reader\n"); fclose($in); $out = fopen($outpipe, 'r'); while(!feof($out)) { echo "From out pipe: " . fgets($out) . PHP_EOL; } fclose($out); pcntl_waitpid($pid, $status); if(pcntl_wifexited($status)) { echo "Reliable exit code: " . pcntl_wexitstatus($status) . PHP_EOL; } unlink($outpipe); unlink($inpipe); } //child else { //parent if($pid = pcntl_fork()) { pcntl_exec('/bin/sh', array('-c', "printf 'A message for the outpipe reader' > $outpipe 2>&1 && exit 12")); } //child else { pcntl_exec('/bin/sh', array('-c', "printf 'From in pipe: '; cat $inpipe")); } } ?> Output: From in pipe: A message for the inpipe reader From out pipe: A message for the outpipe reader Reliable exit code: 12 ---- Server IP: 85.19.212.230 Probable Submitter: 212.33.136.212 ---- Manual Page -- http://www.php.net/manual/en/function.proc-open.php Edit -- https://master.php.net/note/edit/102239 Del: integrated -- https://master.php.net/note/delete/102239/integrated Del: useless -- https://master.php.net/note/delete/102239/useless Del: bad code -- https://master.php.net/note/delete/102239/bad+code Del: spam -- https://master.php.net/note/delete/102239/spam Del: non-english -- https://master.php.net/note/delete/102239/non-english Del: in docs -- https://master.php.net/note/delete/102239/in+docs Del: other reasons-- https://master.php.net/note/delete/102239 Reject -- https://master.php.net/note/reject/102239 Search -- https://master.php.net/manage/user-notes.php