使用类似
void replaceOnReceive(int (*cb) (/*arguments of php_swoole_OnReceive...*/)){
void * pSwooleG = dlsym(/*arguments to get SwooleG...*/);
void * pServ = pSwooleG+OFFSET_SERV;
void * pOnReceive2Replace = (*pServ)+OFFSET_ONRECV;
assert(*pOnReceive2Replace == php_swoole_OnReceive);
*pOnReceive2Replace = cb;
}的方法来替换OnReceive，其中根据版本不同，OFFSET_SERV和OFFSET_ONRECV分别如下
| 版本 | OFFSET_SERV | OFFSET_ONRECV |
|---|---|---|
| 4.4.0-beta | 612 | 1040 |
| 4.4.0-alpha | 612 | 920 |
| 4.3.{5,4,3,2} | 600 | 920 |
| 4.3.1 | 600 | 896 |
| 4.3.0 | 592 | 896 |
| 4.2.13 | 576 | 896 |
| 4.2.{12,11,10,10-beta} | 576 | 1928 |
| 4.2.{9,8,7} | 584 | 1928 |
| 4.2.6 | 640 | 1928 |
| 4.2.{5,4} | 640 | 1920 |
| 4.2.{3,2,0},4.1.{2,1,0} | 640 | 1912 |
| 4.2.1 | 648 | 1904 |
| 4.1.{0-beta,0-alpha},4.0.{4,3,2,1,0,0-rc1,0-beta} | 640 | 1904 |
| 2.2.0,2.1.3(不用考虑) | 656 | 1856 |
| 1.10.6 | 640 | 1896 |