ngx_regex_exec    167 core/ngx_regex.c         n = ngx_regex_exec(re[i].regex, s, NULL, 0);
ngx_regex_exec   2561 http/modules/ngx_http_fastcgi_module.c     n = ngx_regex_exec(flcf->split_regex, &r->uri, captures, (1 + 2) * 3);
ngx_regex_exec   2472 http/modules/ngx_http_ssi_filter_module.c         rc = ngx_regex_exec(rgc.regex, &left, NULL, 0);
ngx_regex_exec   1815 http/ngx_http_variables.c     rc = ngx_regex_exec(re->regex, s, r->captures, len);