Recommended: "PHP Video Tutorial"
Let’s first look at the synchronization code and request time.
$start_time=date("h:i:sa");
for ($i=0; $i <100 ; $i++) {
$urls[]="http://www.downxia.com/downinfo/2315".$i.".html";
GetTitle(geturl("http://www.downxia.com/downinfo/2315".$i.".html"));
}
function geturl($url){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$output = curl_exec($ch);
curl_close($ch);
return $output;
}
function GetTitle($output){
preg_match('/.*<\/title>/i',$output,$matches);
var_dump($matches[0]);
}
$end_time=date("h:i:sa");
echo '开始时间是：'.$start_time;
echo '结束时间是：'.$end_time;</pre><div class="contentsignin">Copy after login</div></div><p><img alt="" class="has" src="https://img.php.cn/upload/article/000/000/020/f3308981971ab2270c03dc7d2f94fb4b-0.jpg"/></p><p>You can see at the bottom that the time took 27 seconds. </p><p> Next, let’s take a look at the code and time spent on php curl’s asynchronous concurrent http requests. </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false;">$start_time=date("h:i:sa");
$urls=[];
for ($i=0; $i <100 ; $i++) {
$urls[]="http://www.downxia.com/downinfo/2315".$i.".html";
}
var_dump($urls);
// GetTitle('klasjdkla<title>313asds12 ');
rolling_curl($urls,'GetTitle');
function GetTitle($output){
preg_match('/.*<\/title>/i',$output,$matches);
var_dump($matches[0]);
}
$end_time=date("h:i:sa");
echo '开始时间是：'.$start_time;
echo '结束时间是：'.$end_time;
function rolling_curl($urls, $callback, $custom_options = null)
{//多个url访问
// 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($master);
return true;
}</pre><div class="contentsignin">Copy after login</div></div><p><img alt="" class="has" src="https://img.php.cn/upload/article/000/000/020/f3308981971ab2270c03dc7d2f94fb4b-1.jpg"/></p><p>It only took 3 seconds? In fact, I think it took 5 seconds, because startup is slower than synchronization, and it was stuck for 2 seconds at the beginning. </p><p>http request efficiency, there is no doubt that asynchronous is much higher than synchronous. </p><p>The core request code is as follows: (This is written by a foreigner, there is a slight problem, the last prompt is undefined offset) </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false;">function rolling_curl($urls, $callback, $custom_options = null)
{//多个url访问
// 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;
}</pre><div class="contentsignin">Copy after login</div></div><p>Modify it. Just add a judgment when adding a new URL. // When $i is equal to the size of the $urls array, there is no need to increase it. </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false;">function rolling_curl($urls, $callback, $custom_options = null)
{//多个url访问
// 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)
// 当$i等于$urls数组大小时不用再增加了
if($i<sizeof($urls)){
$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;
}</pre><div class="contentsignin">Copy after login</div></div><p> Above, the end. Write it down so you don’t forget. </p></body></html>
<p>The above is the detailed content of About php curl asynchronous concurrent request http. For more information, please follow other related articles on the PHP Chinese website!</p> </div>
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