CURLOPT_READFUNCTION  705 ext/curl/interface.c 	REGISTER_CURL_CONSTANT(CURLOPT_READFUNCTION);
CURLOPT_READFUNCTION 1854 ext/curl/interface.c 	curl_easy_setopt(ch->cp, CURLOPT_READFUNCTION,      curl_read);
CURLOPT_READFUNCTION 2650 ext/curl/interface.c 		case CURLOPT_READFUNCTION: