php中popen的使用问题

        $fixedcmd="send 123456063 10000 1111111";        $ph="/usr/src/myappMamou/apps/myapp";        $rs = popen(\"$ph\" \"$fixedcmd\", "r" );	pclose($rs);

<?php$descriptorspec = array(   0 => array("pipe", "r"),  // stdin is a pipe that the child will read from   1 => array("pipe", "w"),  // stdout is a pipe that the child will write to   2 => array("file", "/tmp/error-output.txt", "a") // stderr is a file to write to);$cwd = '/usr/src/myappMamou/apps';$process = proc_open('myapps', $descriptorspec, $pipes, $cwd);if (is_resource($process)) {    // $pipes now looks like this:    // 0 => writeable handle connected to child stdin    // 1 => readable handle connected to child stdout    // Any error output will be appended to /tmp/error-output.txt	$fixedcmd="send 123456063 10000 1111111";    fwrite($pipes[0], $fixedcmd);    fclose($pipes[0]);    echo stream_get_contents($pipes[1]);    fclose($pipes[1]);    // It is important that you close any pipes before calling    // proc_close in order to avoid a deadlock    $return_value = proc_close($process);    echo "command returned $return_value\n";}