I am running a web service which involved with daemons by php+apache2. So I tried pcntl_fork function. But there is a question that the child process are not terminating even I used exit(0) in the child process's code which result in a lot of apache2 processes.
I'm wondering if there is a way to shutdown those useless apache2 processes?
PS: because I'm not very aware of the mechanism of signal, so I tried to make daemon by a single call to a agent script which will exit as soon as the child is created.
switch ($_GET['action']){
case "new":
$pid = pcntl_fork();
switch ($pid){
case -1:
echo "failed to create daemon";
exit;
case 0:
//Code here
exit(0);
break;
default:
echo "Daemon PID：$pid";
}
}
And I'm planning to use a file to control the daemon. For example I will append a line like "exit" to the daemon's control file such as "1.txt" to let it shutdown itself.
PPS: After reading this topic: pcntl_fork() results in defunct parent process, I'm curious about that if the zombie process bug caused the bug.
