note 64116 added to function.proc-open

[Again, please delete my previous comment, the code still contained bugs (sorry). This version now includes Frederick Leitner's fix from below, and also fixes another bug: If an empty file was piped into the process, the loop would hang indefinitely.] The following code works for piping large amounts of data through a filtering program. I find it very weird that such a lot of code is needed for this task... On entry, $stdin contains the standard input for the program. Tested on Debian Linux with PHP 5.1.2. $descriptorSpec = array(0 => array("pipe", "r"), 1 => array('pipe', 'w'), 2 => array('pipe', 'w')); $process = proc_open($command, $descriptorSpec, $pipes); $txOff = 0; $txLen = strlen($stdin); $stdout = ''; $stdoutDone = FALSE; $stderr = ''; $stderrDone = FALSE; stream_set_blocking($pipes[0], 0); // Make stdin/stdout/stderr non-blocking stream_set_blocking($pipes[1], 0); stream_set_blocking($pipes[2], 0); if ($txLen == 0) fclose($pipes[0]); while (TRUE) { $rx = array(); // The program's stdout/stderr if (!$stdoutDone) $rx[] = $pipes[1]; if (!$stderrDone) $rx[] = $pipes[2]; $tx = array(); // The program's stdin if ($txOff < $txLen) $tx[] = $pipes[0]; stream_select($rx, $tx, $ex = NULL, NULL, NULL); // Block til r/w possible if (!empty($tx)) { $txRet = fwrite($pipes[0], substr($stdin, $txOff, 8192)); if ($txRet !== FALSE) $txOff += $txRet; if ($txOff >= $txLen) fclose($pipes[0]); } foreach ($rx as $r) { if ($r == $pipes[1]) { $stdout .= fread($pipes[1], 8192); if (feof($pipes[1])) { fclose($pipes[1]); $stdoutDone = TRUE; } } else if ($r == $pipes[2]) { $stderr .= fread($pipes[2], 8192); if (feof($pipes[2])) { fclose($pipes[2]); $stderrDone = TRUE; } } } if (!is_resource($process)) break; if ($txOff >= $txLen && $stdoutDone && $stderrDone) break; } $returnValue = proc_close($process); ---- Server IP: 217.13.201.10 Probable Submitter: 85.181.21.132 ---- X-Spam-Status: No, hits=3.1 required=5.0 tests=DATE_MISSING,FROM_NO_LOWER autolearn=no version=2.64 ---- Manual Page -- http://www.php.net/manual/en/function.proc-open.php Edit -- http://master.php.net/note/edit/64116 Del: integrated -- http://master.php.net/note/delete/64116/integrated Del: useless -- http://master.php.net/note/delete/64116/useless Del: bad code -- http://master.php.net/note/delete/64116/bad+code Del: spam -- http://master.php.net/note/delete/64116/spam Del: non-english -- http://master.php.net/note/delete/64116/non-english Del: in docs -- http://master.php.net/note/delete/64116/in+docs Del: other reasons-- http://master.php.net/note/delete/64116 Reject -- http://master.php.net/note/reject/64116 Search -- http://master.php.net/manage/user-notes.php