来自工单，很不错

不翻译了，认真看的话都能看懂

---

#!define IPADDR 127.0.0.1

#!defexp SIPURI "sip:" + IPADDR + ":5060"
#!defexp QSIPURI '"sip:' + IPADDR + ':5060"'

#!defexp V16 1<<4

Another possibility is using modparamx() and interpolating your strings there:

#!defenv MYSQL_IP 

modparamx("permissions, "db_url", "mysql://kamailio:kamailio@$def(MYSQL_IP)/kamailio");
Or even just:

modparamx("permissions, "db_url", "mysql://kamailio:kamailio@$env(MYSQL_IP)/kamailio");