|
|
|
|
Bookmark this on Delicious
Share on Facebook
 Slashdot It!
Digg  pcntl_waitpid
Waits on or returns the status of a forked child
(PHP 4 >= 4.0.7, PHP 5)
Code Examples / Notes » pcntl_waitpidadmin
Here's a decent example of the pcntl_waitpid() call: $i = 0; $starttime = microtime(TRUE); $pid_arr = array(); while ($i < intval($argv[1])) { $pid = pcntl_fork(); if ($pid == -1) { die('could not fork'); } else { if ($pid) // parent { $pid_arr[$i] = $pid; } else // child { performSomeFunction($i+1); } } $i++; } foreach ($pid_arr as $pid) { // we are the parent pcntl_waitpid($pid, $status); } $elapsed = microtime(TRUE) - $starttime; print "\n==> total elapsed: " . sprintf("%f secs.\n", $elapsed); kevin
--- while ($i < intval($argv[1])) { $pid = pcntl_fork(); if ($pid == -1) { die('could not fork'); } else { if ($pid) // parent { $pid_arr[$i] = $pid; } else // child { performSomeFunction($i+1); } } $i++; } --- careful, this will create a lot more children than you probably expect. You must return or exit after performSomeFunction($i+1); ie, else // child { performSomeFunction($i+1); exit(0); } |
