Created
November 16, 2015 08:19
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curl_multi多线程curl抓取数据
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<?php | |
function rolling_curl($urls, $callback, $custom_options = null) { | |
// make sure the rolling window isn't greater than the # of urls | |
$rolling_window = 5; | |
$rolling_window = (sizeof($urls) < $rolling_window) ? sizeof($urls) : $rolling_window; | |
$master = curl_multi_init(); | |
$curl_arr = array(); | |
// add additional curl options here | |
$std_options = array(CURLOPT_RETURNTRANSFER => true, | |
CURLOPT_FOLLOWLOCATION => true, | |
CURLOPT_MAXREDIRS => 5); | |
$options = ($custom_options) ? ($std_options + $custom_options) : $std_options; | |
// start the first batch of requests | |
for ($i = 0; $i < $rolling_window; $i++) { | |
$ch = curl_init(); | |
$options[CURLOPT_URL] = $urls[$i]; | |
curl_setopt_array($ch,$options); | |
curl_multi_add_handle($master, $ch); | |
} | |
do { | |
while(($execrun = curl_multi_exec($master, $running)) == CURLM_CALL_MULTI_PERFORM); | |
if($execrun != CURLM_OK) | |
break; | |
// a request was just completed -- find out which one | |
while($done = curl_multi_info_read($master)) { | |
$info = curl_getinfo($done['handle']); | |
if ($info['http_code'] == 200) { | |
$output = curl_multi_getcontent($done['handle']); | |
// request successful. process output using the callback function. | |
$callback($output); | |
// start a new request (it's important to do this before removing the old one) | |
$ch = curl_init(); | |
$options[CURLOPT_URL] = $urls[$i++]; // increment i | |
curl_setopt_array($ch,$options); | |
curl_multi_add_handle($master, $ch); | |
// remove the curl handle that just completed | |
curl_multi_remove_handle($master, $done['handle']); | |
} else { | |
// request failed. add error handling. | |
} | |
} | |
} while ($running); | |
curl_multi_close($master); | |
return true; | |
} |
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