php curl async callback
function process_multi_requests($urls, $callback){
$handle = curl_multi_init();
foreach ($urls as $url) {
$ch = curl_init($url);
curl_setopt_array($ch, array(CURLOPT_RETURNTRANSFER => TRUE));
curl_multi_add_handle($handle, $ch);
}
do {
$mrc = curl_multi_exec($handle, $active);
if ($state = curl_multi_info_read($handle)) {
$info = curl_getinfo($state['handle']);
$callback(curl_multi_getcontent($state['handle']), $info);
curl_multi_remove_handle($handle, $state['handle']);
}
} while ($mrc == CURLM_CALL_MULTI_PERFORM || $active);
curl_multi_close($handle);
}
$urls=array(
"http://127.0.0.1/url1.php",
"http://127.0.0.1/url2.php",
"http://127.0.0.1/url3.php",
);
process_multi_requests($urls,function($result){
echo "$result\n";
});