Understanding PHP multi_curl_exec loops
In the PHP curl_multi_exec manual, a strange 3 loops are given as an example:
do {
$mrc = curl_multi_exec($mh, $active);
} while ($mrc == CURLM_CALL_MULTI_PERFORM);
while ($active && $mrc == CURLM_OK) {
if (curl_multi_select($mh) != -1) {
do {
$mrc = curl_multi_exec($mh, $active);
} while ($mrc == CURLM_CALL_MULTI_PERFORM);
}
} I was wondering why we needed so many while loops as opposed to a simple one such as:
do {
curl_multi_exec($master,$running);
} while($running > 0); What I have found is mostly due to prevent making unnecessary calls to curl_multi_exec.