l int strlen(string str) :取得字符串长度 l string substr(string string,int start[,int len]) :截取字符串 string string:原字符串 int start:从哪开始截取 [,int len]:可选,截取长度 l string strto...
B2C:business to customer 商家对客户 C2C:customer to customer 客户对客户 B2B:business to business 商家对商家 B2B2C:business to business to customer 商家对商家对客户 O2O:online to offline 线上线...