curl_multi_init单线程改多线程
问题:
如何将以下单线程curl代码改写成多线程版本,利用curl_multi_init提高效率?
for ($i=0; $i < 100; $i++) { $res[$key] = post($url, 'key='.$i); }
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答案:
以下是使用curl_multi_init实现多线程版本的代码:
$newData = array_chunk($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_URL, $url); curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-type:application/x-www-form-urlencoded;charset=utf-8;')); curl_setopt($ch, CURLOPT_TIMEOUT, 30); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_HEADER, 0); curl_setopt($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); }
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相对于单线程版本,此代码通过curl_multi_init同时执行多个curl请求,并使用curl_multi_exec等函数控制这些请求的执行流程,从而提高了效率。
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