void
ngx_http_core_run_phases(ngx_http_request_t *r)
{
    ngx_int_t                   rc;
    ngx_http_phase_handler_t   *ph;
    ngx_http_core_main_conf_t  *cmcf;

    cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);

    ph = cmcf->phase_engine.handlers;

    while (ph[r->phase_handler].checker) {

        rc = ph[r->phase_handler].checker(r, &ph[r->phase_handler]);

        if (rc == NGX_OK) {
            return;
        }
    }
}