curl_multi_init单线程改多线程实现
原来单线程的curl实现如下：
function post($url, $data = '', $head = 'application/x-www-form-urlencoded')
{
// ...
$output = curl_exec($ch);
curl_close($ch);
return $output;
}现在要将其改为多线程，思路是将数据数组分成小块，然后对每一块都创建一个单独的curl句柄。
$newData = array_chunk($data, 10, true);
foreach ($newData as $k => $tmp) {
$mh = curl_multi_init();
$chs = [];
foreach ($tmp as $key => $url) {
$ch = curl_init();
$chs[$key] = $ch;
// ...
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $tmp);
curl_multi_add_handle($mh, $ch);
}
$active = null;
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);
}
}
foreach ($chs as $key => $ch) {
$res[$k][$key] = curl_multi_getcontent($ch);
curl_multi_remove_handle($mh, $ch);
}
curl_multi_close($mh);
}
var_dump($res); 
