$pid) { die(__FILE__ . ':' . __LINE__ . "\n"); } if ($pid) { echo "fork $pid
\n"; sleep(1); echo "exit parent process
\n"; exit(); } sleep(3); echo "Child
\n"; sleep(3); echo "Child
\n"; sleep(3); echo "Child
\n"; } } $apc = new AsyncPC(); $apc->run();