这篇文章主要介绍了php实现 master-worker 守护多进程模式的实例代码，代码简单易懂，非常不错，具有一定的参考借鉴价值 ,需要的朋友可以参考下。

具体代码如下所示：

1. <?php
2. class Worker{
3. public static $count = 2;
4. public static function runAll(){
5. static::runMaster();
6. static::moniProcess();
7. }
8. //开启主进程
9. public static function runMaster(){
10. //确保进程有最大操作权限
11. unmask(0);
12. $pid = pcntl_fork();
13. if($pid > 0){
14. echo "主进程进程 $pid \n";
15. exit;
16. }else if($pid == 0){
17. if(-1 === posix_setsid()){
18. throw new Exception("setsid fail");
19. }
20. for ($i=0; $i < self::$count; $i++) {
21. static::runWorker();
22. }
23. @cli_set_process_title("master_process");
24. }else{
25. throw new Exception("创建主进程失败");
26. }
27. }
28. //开启子进程
29. public static function runWorker(){
30. unmask(0);
31. $pid = pcntl_fork();
32. if($pid > 0){
33. // echo "创建子进程 $pid \n";
34. }else if($pid == 0){
35. if(-1 === posix_setsid()){
36. throw new Exception("setsid fail");
37. }
38. @cli_set_process_title("worker_process");
39. while(1){
40. sleep(1);
41. }
42. }else{
43. throw new Exception("创建子进程失败");
44. }
45. }
46. //监控worker进程
47. public function moniProcess(){
48. while( $pid = pcntl_wait($status)){
49. if($pid == -1){
50. break;
51. }else{
52. static::runWorker();
53. }
54. }
55. }
56. }

Worker::runAll();

1. ps -aux
2. USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
3. root 1 0.0 0.0 18200 3076 pts/0 Ss+ 14:05 0:00 bash
4. root 6 0.0 0.0 18208 3252 pts/1 Ss 14:06 0:00 bash
5. root 19 0.0 0.0 18204 3248 pts/2 Ss+ 14:11 0:00 bash
6. root 64 0.0 0.2 348488 8320 ? Ss 15:32 0:00 master_process
7. root 65 0.0 0.2 348488 8400 ? Ss 15:32 0:00 worker_process
8. root 66 0.0 0.2 348488 8400 ? Ss 15:32 0:00 worker_process
9. root 67 0.0 0.0 36640 2804 pts/1 R+ 15:32 0:00 ps -aux

执行命令 kill 65，杀死进程 65 则master_process 进程会再自动开启一个子进程

1. USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
2. root 1 0.0 0.0 18200 3076 pts/0 Ss+ 14:05 0:00 bash
3. root 6 0.0 0.0 18208 3252 pts/1 Ss 14:06 0:00 bash
4. root 19 0.0 0.0 18204 3248 pts/2 Ss+ 14:11 0:00 bash
5. root 64 0.0 0.2 348488 8320 ? Ss 15:32 0:00 master_process
6. root 66 0.0 0.2 348488 8400 ? Ss 15:32 0:00 worker_process
7. root 68 0.0 0.1 348488 5796 ? Ss 15:34 0:00 worker_process
8. root 69 0.0 0.0 36640 2728 pts/1 R+ 15:34 0:00 ps -aux