blocks|key|1321651|text|file_get_contents会做你想做的事|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1321652|$output+=+file_get_contents('http://www.example.com/');
echo+$output;|code-block|syntax|javascript|1321653|编辑:触发GET请求并立即返回的一种方法。|1321654|引用自http://petewarden.typepad.com/searchbrowser/2008/06/how-to-post-an.html|1321655|function+curl_post_async($url,+$params)
{
++++foreach+($params+as+$key+=>+&$val)+{
++++++if+(is_array($val))+$val+=+implode(',',+$val);
++++++++$post_params[]+=+$key.'='.urlencode($val);
++++}
++++$post_string+=+implode('&',+$post_params);

++++$parts=parse_url($url);

++++$fp+=+fsockopen($parts['host'],
++++++++isset($parts['port'])?$parts['port']:80,
++++++++$errno,+$errstr,+30);

++++$out+=+"POST+".$parts['path']."+HTTP/1.1\r\n";
++++$out.=+"Host:+".$parts['host']."\r\n";
++++$out.=+"Content-Type:+application/x-www-form-urlencoded\r\n";
++++$out.=+"Content-Length:+".strlen($post_string)."\r\n";
++++$out.=+"Connection:+Close\r\n\r\n";
++++if+(isset($post_string))+$out.=+$post_string;

++++fwrite($fp,+$out);
++++fclose($fp);
}|1321656|这样做的目的是打开一个套接字，发出一个get请求，然后立即关闭该套接字并返回。|1321657|entityMap|0|LINK|mutability|MUTABLE|url|http://petewarden.typepad.com/searchbrowser/2008/06/how-to-post-an.html^0|0|H|0|0|0|3|1Z|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|14|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|15|8|@]|D|@$9|16|A|17|1|18]]|E|$]]|$1|O|3|P|5|H|7|19|8|@]|D|@]|E|$I|J]]|$1|Q|3|R|5|6|7|1A|8|@]|D|@]|E|$]]|$1|S|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]]]

<code>file_get_contents</code> will do what you want

<pre><code>$output = file_get_contents('http://www.example.com/');
echo $output;
</code></pre>

Edit: One way to fire off a GET request and return immediately.

Quoted from <a href="http://petewarden.typepad.com/searchbrowser/2008/06/how-to-post-an.html" rel="noreferrer">http://petewarden.typepad.com/searchbrowser/2008/06/how-to-post-an.html</a>

<pre><code>function curl_post_async($url, $params)
{
 foreach ($params as $key =&gt; &amp;$val) {
 if (is_array($val)) $val = implode(',', $val);
 $post_params[] = $key.'='.urlencode($val);
 }
 $post_string = implode('&amp;', $post_params);

 $parts=parse_url($url);

 $fp = fsockopen($parts['host'],
 isset($parts['port'])?$parts['port']:80,
 $errno, $errstr, 30);

 $out = "POST ".$parts['path']." HTTP/1.1\r\n";
 $out.= "Host: ".$parts['host']."\r\n";
 $out.= "Content-Type: application/x-www-form-urlencoded\r\n";
 $out.= "Content-Length: ".strlen($post_string)."\r\n";
 $out.= "Connection: Close\r\n\r\n";
 if (isset($post_string)) $out.= $post_string;

 fwrite($fp, $out);
 fclose($fp);
}
</code></pre>

What this does is open a socket, fire off a get request, and immediately close the socket and return.

blocks|key|1536933|text|有趣的问题。我猜您只是想在另一台服务器上触发一些流程或操作，但并不关心结果是什么，并希望您的脚本继续执行。cURL中可能有一些东西可以实现这一点，但是如果cURL不能这样做，您可能想要考虑使用exec()在服务器上运行另一个执行调用的脚本。(通常，人们希望得到脚本调用的结果，所以我不确定PHP是否能够直接触发进程。)使用exec()，您可以运行一个wget，甚至另一个用file_get_conents()发出请求的PHP脚本。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1536934|entityMap^0|2O|6|4H|6|4V|4|56|I|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|G|$]]

Interesting problem. I'm guessing you just want to trigger some process or action on the other server, but don't care what the results are and want your script to continue. There is probably something in cURL that can make this happen, but you may want to consider using <code>exec()</code> to run another script on the server that does the call if cURL can't do it. (Typically people want the results of the script call so I'm not sure if PHP has the ability to just trigger the process.) With <code>exec()</code> you could run a <code>wget</code> or even another PHP script that makes the request with <code>file_get_conents()</code>.

blocks|key|1321753|text|尝试：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1321754|//Your+Code+here
$pid+=+pcntl_fork();
if+($pid+==+-1)+{
+++++die('could+not+fork');
}
else+if+($pid)
{
echo("Bye")++
}
else
{
+++++//Do+Post+Processing
}|code-block|syntax|javascript|1321755|这将不能作为apache模块工作，您需要使用CGI。|1321756|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Try:

<pre><code>//Your Code here
$pid = pcntl_fork();
if ($pid == -1) {
 die('could not fork');
}
else if ($pid)
{
echo("Bye") 
}
else
{
 //Do Post Processing
}
</code></pre>

This will NOT work as an apache module, you need to be using CGI.

blocks|key|1321810|text|我发现了这个有趣的链接来进行异步处理(get请求)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1321811|askapache|offset|length|1321812|此外，您可以使用消息队列进行异步处理，例如beanstalkd。|1321813|entityMap|0|LINK|mutability|MUTABLE|url|http://www.askapache.com/php/speedy-form-post.html^0|0|0|9|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

I found this interesting link to do asynchronous processing(get request).

<a href="http://www.askapache.com/php/speedy-form-post.html" rel="nofollow noreferrer">askapache</a>

Furthermore you could do asynchronous processing by using a message queue like for instance beanstalkd.

blocks|key|1321903|text|下面是如何让Marquis的回答同时处理POST和GET请求：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1321904|++//+$type+must+equal+'GET'+or+'POST'
++function+curl_request_async($url,+$params,+$type='POST')
++{
++++++foreach+($params+as+$key+=>+&$val)+{
++++++++if+(is_array($val))+$val+=+implode(',',+$val);
++++++++$post_params[]+=+$key.'='.urlencode($val);
++++++}
++++++$post_string+=+implode('&',+$post_params);

++++++$parts=parse_url($url);

++++++$fp+=+fsockopen($parts['host'],
++++++++++isset($parts['port'])?$parts['port']:80,
++++++++++$errno,+$errstr,+30);

++++++//+Data+goes+in+the+path+for+a+GET+request
++++++if('GET'+==+$type)+$parts['path']+.=+'?'.$post_string;

++++++$out+=+"$type+".$parts['path']."+HTTP/1.1\r\n";
++++++$out.=+"Host:+".$parts['host']."\r\n";
++++++$out.=+"Content-Type:+application/x-www-form-urlencoded\r\n";
++++++$out.=+"Content-Length:+".strlen($post_string)."\r\n";
++++++$out.=+"Connection:+Close\r\n\r\n";
++++++//+Data+goes+in+the+request+body+for+a+POST+request
++++++if+('POST'+==+$type+&&+isset($post_string))+$out.=+$post_string;

++++++fwrite($fp,+$out);
++++++fclose($fp);
++}|code-block|syntax|javascript|1321905|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is how to make Marquis' answer work with both POST and GET requests:

<pre><code> // $type must equal 'GET' or 'POST'
 function curl_request_async($url, $params, $type='POST')
 {
 foreach ($params as $key =&gt; &amp;$val) {
 if (is_array($val)) $val = implode(',', $val);
 $post_params[] = $key.'='.urlencode($val);
 }
 $post_string = implode('&amp;', $post_params);

 $parts=parse_url($url);

 $fp = fsockopen($parts['host'],
 isset($parts['port'])?$parts['port']:80,
 $errno, $errstr, 30);

 // Data goes in the path for a GET request
 if('GET' == $type) $parts['path'] .= '?'.$post_string;

 $out = "$type ".$parts['path']." HTTP/1.1\r\n";
 $out.= "Host: ".$parts['host']."\r\n";
 $out.= "Content-Type: application/x-www-form-urlencoded\r\n";
 $out.= "Content-Length: ".strlen($post_string)."\r\n";
 $out.= "Connection: Close\r\n\r\n";
 // Data goes in the request body for a POST request
 if ('POST' == $type &amp;&amp; isset($post_string)) $out.= $post_string;

 fwrite($fp, $out);
 fclose($fp);
 }
</code></pre>

blocks|key|1321993|text|您最好考虑使用消息队列，而不是建议的方法。我确信这将是更好的解决方案，尽管它需要比发送请求多一点的工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1321994|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You'd better consider using Message Queues instead of advised methods.
I'm sure this will be better solution, although it requires a little more job than just sending a request.

blocks|key|1322071|text|让我向您介绍我的方法:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1322072|需要在服务器上安装nodejs|1322073|(我的服务器发送1000个https+get请求只需要2秒)|1322074|url.php：|1322075|<?
$urls+=+array_fill(0,+100,+'http://google.com/blank.html');

function+execinbackground($cmd)+{+
++++if+(substr(php_uname(),+0,+7)+==+"Windows"){+
++++++++pclose(popen("start+/B+".+$cmd,+"r"));++
++++}+
++++else+{+
++++++++exec($cmd+.+"+>+/dev/null+&");+++
++++}+
}+
fwite(fopen("urls.txt","w"),implode("\n",$urls);
execinbackground("nodejs+urlscript.js+urls.txt");
//+{+do+your+work+while+get+requests+being+executed..+}
?>|code-block|syntax|javascript|1322076|urlscript.js+>|1322077|var+https+=+require('https');
var+url+=+require('url');
var+http+=+require('http');
var+fs+=+require('fs');
var+dosya+=+process.argv[2];
var+logdosya+=+'log.txt';
var+count=0;
http.globalAgent.maxSockets+=+300;
https.globalAgent.maxSockets+=+300;

setTimeout(timeout,100000);+//+maximum+execution+time+(in+ms)

function+trim(string)+{
++++return+string.replace(/%5E\s*%7C\s*$/g,+'')
}

fs.readFile(process.argv[2],+'utf8',+function+(err,+data)+{
++++if+(err)+{
++++++++throw+err;
++++}
++++parcala(data);
});

function+parcala(data)+{
++++var+data+=+data.split("\n");
++++count=''%2Bdata.length%2B'-'%2Bdata[1];
++++data.forEach(function+(d)+{
++++++++req(trim(d));
++++});
++++/*
++++fs.unlink(dosya,+function+d()+{
++++++++console.log('<%25s>+file+deleted',+dosya);
++++});
++++*/
}


function+req(link)+{
++++var+linkinfo+=+url.parse(link);
++++if+(linkinfo.protocol+==+'https:')+{
++++++++var+options+=+{
++++++++host:+linkinfo.host,
++++++++port:+443,
++++++++path:+linkinfo.path,
++++++++method:+'GET'
++++};
https.get(options,+function(res)+{res.on('data',+function(d)+{});}).on('error',+function(e)+{console.error(e);});
++++}+else+{
++++var+options+=+{
++++++++host:+linkinfo.host,
++++++++port:+80,
++++++++path:+linkinfo.path,
++++++++method:+'GET'
++++};++++++++
http.get(options,+function(res)+{res.on('data',+function(d)+{});}).on('error',+function(e)+{console.error(e);});
++++}
}


process.on('exit',+onExit);

function+onExit()+{
++++log();
}

function+timeout()
{
console.log("i+am+too+far+gone");process.exit();
}

function+log()+
{
++++var+fd+=+fs.openSync(logdosya,+'a%2B');
++++fs.writeSync(fd,+dosya+%2B+'-'%2Bcount%2B'\n');
++++fs.closeSync(fd);
}|1322078|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|V|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|W|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|J|7|Y|8|@]|9|@]|A|$K|L]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

let me show you my way :)

needs nodejs installed on the server

(my server sends 1000 https get request takes only 2 seconds)

url.php : 

<pre><code>&lt;?
$urls = array_fill(0, 100, 'http://google.com/blank.html');

function execinbackground($cmd) { 
 if (substr(php_uname(), 0, 7) == "Windows"){ 
 pclose(popen("start /B ". $cmd, "r")); 
 } 
 else { 
 exec($cmd . " &gt; /dev/null &amp;"); 
 } 
} 
fwite(fopen("urls.txt","w"),implode("\n",$urls);
execinbackground("nodejs urlscript.js urls.txt");
// { do your work while get requests being executed.. }
?&gt;
</code></pre>

urlscript.js >

<pre><code>var https = require('https');
var url = require('url');
var http = require('http');
var fs = require('fs');
var dosya = process.argv[2];
var logdosya = 'log.txt';
var count=0;
http.globalAgent.maxSockets = 300;
https.globalAgent.maxSockets = 300;

setTimeout(timeout,100000); // maximum execution time (in ms)

function trim(string) {
 return string.replace(/^\s*|\s*$/g, '')
}

fs.readFile(process.argv[2], 'utf8', function (err, data) {
 if (err) {
 throw err;
 }
 parcala(data);
});

function parcala(data) {
 var data = data.split("\n");
 count=''+data.length+'-'+data[1];
 data.forEach(function (d) {
 req(trim(d));
 });
 /*
 fs.unlink(dosya, function d() {
 console.log('&lt;%s&gt; file deleted', dosya);
 });
 */
}


function req(link) {
 var linkinfo = url.parse(link);
 if (linkinfo.protocol == 'https:') {
 var options = {
 host: linkinfo.host,
 port: 443,
 path: linkinfo.path,
 method: 'GET'
 };
https.get(options, function(res) {res.on('data', function(d) {});}).on('error', function(e) {console.error(e);});
 } else {
 var options = {
 host: linkinfo.host,
 port: 80,
 path: linkinfo.path,
 method: 'GET'
 }; 
http.get(options, function(res) {res.on('data', function(d) {});}).on('error', function(e) {console.error(e);});
 }
}


process.on('exit', onExit);

function onExit() {
 log();
}

function timeout()
{
console.log("i am too far gone");process.exit();
}

function log() 
{
 var fd = fs.openSync(logdosya, 'a+');
 fs.writeSync(fd, dosya + '-'+count+'\n');
 fs.closeSync(fd);
}
</code></pre>

blocks|key|1537454|text|试试这段代码...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1537455|$chu+=+curl_init();

curl_setopt($chu,+CURLOPT_URL,+'http://www.myapp.com/test.php?someprm=xyz');

curl_setopt($chu,+CURLOPT_FRESH_CONNECT,+true);
curl_setopt($chu,+CURLOPT_TIMEOUT,+1);

curl_exec($chu);
curl_close($chu);|code-block|syntax|javascript|1537456|请不要忘记启用CURL+php扩展。|1537457|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Try this code....

<pre><code>$chu = curl_init();

curl_setopt($chu, CURLOPT_URL, 'http://www.myapp.com/test.php?someprm=xyz');

curl_setopt($chu, CURLOPT_FRESH_CONNECT, true);
curl_setopt($chu, CURLOPT_TIMEOUT, 1);

curl_exec($chu);
curl_close($chu);
</code></pre>

Please dont forget to enable CURL php extension.

blocks|key|1322177|text|function+make_request($url,+$waitResult=true){
++++$cmi+=+curl_multi_init();

++++$curl+=+curl_init();
++++curl_setopt($curl,+CURLOPT_URL,+$url);
++++curl_setopt($curl,+CURLOPT_RETURNTRANSFER,+true);

++++curl_multi_add_handle($cmi,+$curl);

++++$running+=+null;
++++do+{
++++++++curl_multi_exec($cmi,+$running);
++++++++sleep(.1);
++++++++if(!$waitResult)
++++++++break;
++++}+while+($running+>+0);
++++curl_multi_remove_handle($cmi,+$curl);
++++if($waitResult){
++++++++$curlInfos+=+curl_getinfo($curl);
++++++++if((int)+$curlInfos['http_code']+==+200){
++++++++++++curl_multi_close($cmi);
++++++++++++return+curl_multi_getcontent($curl);
++++++++}
++++}
++++curl_multi_close($cmi);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1322178|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>function make_request($url, $waitResult=true){
 $cmi = curl_multi_init();

 $curl = curl_init();
 curl_setopt($curl, CURLOPT_URL, $url);
 curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

 curl_multi_add_handle($cmi, $curl);

 $running = null;
 do {
 curl_multi_exec($cmi, $running);
 sleep(.1);
 if(!$waitResult)
 break;
 } while ($running &gt; 0);
 curl_multi_remove_handle($cmi, $curl);
 if($waitResult){
 $curlInfos = curl_getinfo($curl);
 if((int) $curlInfos['http_code'] == 200){
 curl_multi_close($cmi);
 return curl_multi_getcontent($curl);
 }
 }
 curl_multi_close($cmi);
}
</code></pre>

blocks|key|1322256|text|我建议您使用经过良好测试的PHP库：curl-easy|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1322257|<?php
$request+=+new+cURL\Request('http://www.externalsite.com/script2.php?variable=45');
$request->getOptions()
++++->set(CURLOPT_TIMEOUT,+5)
++++->set(CURLOPT_RETURNTRANSFER,+true);

//+add+callback+when+the+request+will+be+completed
$request->addListener('complete',+function+(cURL\Event+$event)+{
++++$response+=+$event->response;
++++$content+=+$response->getContent();
++++echo+$content;
});

while+($request->socketPerform())+{
++++//+do+anything+else+when+the+request+is+processed
}|code-block|syntax|javascript|1322258|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/stil/curl-easy^0|I|9|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

I would recommend you well tested PHP library: <a href="https://github.com/stil/curl-easy" rel="noreferrer">curl-easy</a>

<pre><code>&lt;?php
$request = new cURL\Request('http://www.externalsite.com/script2.php?variable=45');
$request-&gt;getOptions()
 -&gt;set(CURLOPT_TIMEOUT, 5)
 -&gt;set(CURLOPT_RETURNTRANSFER, true);

// add callback when the request will be completed
$request-&gt;addListener('complete', function (cURL\Event $event) {
 $response = $event-&gt;response;
 $content = $response-&gt;getContent();
 echo $content;
});

while ($request-&gt;socketPerform()) {
 // do anything else when the request is processed
}
</code></pre>

blocks|key|1537616|text|以下是用于执行简单GET请求的已接受答案的改编。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1537617|需要注意的一点是，如果服务器进行任何url重写，这将不起作用。你需要使用一个功能更全的http客户端。|1537618|++/**
+++*+Performs+an+async+get+request+(doesn't+wait+for+response)
+++*+Note:+One+limitation+of+this+approach+is+it+will+not+work+if+server+does+any+URL+rewriting
+++*/
++function+async_get($url)
++{
++++++$parts=parse_url($url);

++++++$fp+=+fsockopen($parts['host'],
++++++++++isset($parts['port'])?$parts['port']:80,
++++++++++$errno,+$errstr,+30);

++++++$out+=+"GET+".$parts['path']."+HTTP/1.1\r\n";
++++++$out.=+"Host:+".$parts['host']."\r\n";
++++++$out.=+"Connection:+Close\r\n\r\n";
++++++fwrite($fp,+$out);
++++++fclose($fp);
++}|code-block|syntax|javascript|1537619|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Here's an adaptation of the accepted answer for performing a simple GET request.

One thing to note if the server does any url rewriting, this will not work. You'll need to use a more full featured http client. 

<pre><code> /**
 * Performs an async get request (doesn't wait for response)
 * Note: One limitation of this approach is it will not work if server does any URL rewriting
 */
 function async_get($url)
 {
 $parts=parse_url($url);

 $fp = fsockopen($parts['host'],
 isset($parts['port'])?$parts['port']:80,
 $errno, $errstr, 30);

 $out = "GET ".$parts['path']." HTTP/1.1\r\n";
 $out.= "Host: ".$parts['host']."\r\n";
 $out.= "Connection: Close\r\n\r\n";
 fwrite($fp, $out);
 fclose($fp);
 }
</code></pre>

blocks|key|1322376|text|基于这个线程，我为我的codeigniter项目做了这个。它工作得很好。你可以在后台处理任何函数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1322377|接受异步调用的控制器。|1322378|class+Daemon+extends+CI_Controller
{
++++//+Remember+to+disable+CI's+csrf-checks+for+this+controller

++++function+index(+)
++++{
++++++++ignore_user_abort(+1+);
++++++++try
++++++++{
++++++++++++if+(+strcmp(+$_SERVER['REMOTE_ADDR'],+$_SERVER['SERVER_ADDR']+)+!=+0+&&+!in_array(+$_SERVER['REMOTE_ADDR'],+$this->config->item(+'proxy_ips'+)+)+)
++++++++++++{
++++++++++++++++log_message(+"error",+"Daemon+called+from+untrusted+IP-address:+"+.+$_SERVER['REMOTE_ADDR']+);
++++++++++++++++show_404(+'/daemon'+);
++++++++++++++++return;
++++++++++++}

++++++++++++$this->load->library(+'encrypt'+);
++++++++++++$params+=+unserialize(+urldecode(+$this->encrypt->decode(+$_POST['data']+)+)+);
++++++++++++unset(+$_POST+);
++++++++++++$model+=+array_shift(+$params+);
++++++++++++$method+=+array_shift(+$params+);
++++++++++++$this->load->model(+$model+);
++++++++++++if+(+call_user_func_array(+array(+$this->$model,+$method+),+$params+)+===+FALSE+)
++++++++++++{
++++++++++++++++log_message(+"error",+"Daemon+could+not+call:+"+.+$model+.+"::"+.+$method+.+"()"+);
++++++++++++}
++++++++}
++++++++catch(Exception+$e)
++++++++{
++++++++++++log_message(+"error",+"Daemon+has+error:+"+.+$e->getMessage(+)+.+$e->getFile(+)+.+$e->getLine(+)+);
++++++++}
++++}
}|code-block|syntax|javascript|1322379|和一个执行异步调用的库|1322380|class+Daemon
{
++++public+function+execute_background(+/*+model,+method,+params+*/+)
++++{
++++++++$ci+=+&get_instance(+);
++++++++//+The+callback+URL+(its+ourselves)
++++++++$parts+=+parse_url(+$ci->config->item(+'base_url'+)+.+"/daemon"+);
++++++++if+(+strcmp(+$parts['scheme'],+'https'+)+==+0+)
++++++++{
++++++++++++$port+=+443;
++++++++++++$host+=+"ssl://"+.+$parts['host'];
++++++++}
++++++++else+
++++++++{
++++++++++++$port+=+80;
++++++++++++$host+=+$parts['host'];
++++++++}
++++++++if+(+(+$fp+=+fsockopen(+$host,+isset(+$parts['port']+)+?+$parts['port']+:+$port,+$errno,+$errstr,+30+)+)+===+FALSE+)
++++++++{
++++++++++++throw+new+Exception(+"Internal+server+error:+background+process+could+not+be+started"+);
++++++++}
++++++++$ci->load->library(+'encrypt'+);
++++++++$post_string+=+"data="+.+urlencode(+$ci->encrypt->encode(+serialize(+func_get_args(+)+)+)+);
++++++++$out+=+"POST+"+.+$parts['path']+.+"+HTTP/1.1\r\n";
++++++++$out+.=+"Host:+"+.+$host+.+"\r\n";
++++++++$out+.=+"Content-Type:+application/x-www-form-urlencoded\r\n";
++++++++$out+.=+"Content-Length:+"+.+strlen(+$post_string+)+.+"\r\n";
++++++++$out+.=+"Connection:+Close\r\n\r\n";
++++++++$out+.=+$post_string;
++++++++fwrite(+$fp,+$out+);
++++++++fclose(+$fp+);
++++}
}|1322381|可以调用此方法来处理“后台”中的任何model::+method+()。它使用可变参数。|1322382|$this->load->library('daemon');
$this->daemon->execute_background(+'model',+'method',+$arg1,+$arg2,+...+);|1322383|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Based on this thread I made this for my codeigniter project. It works just fine. You can have any function processed in the background.

A controller that accepts the async calls.

<pre><code>class Daemon extends CI_Controller
{
 // Remember to disable CI's csrf-checks for this controller

 function index( )
 {
 ignore_user_abort( 1 );
 try
 {
 if ( strcmp( $_SERVER['REMOTE_ADDR'], $_SERVER['SERVER_ADDR'] ) != 0 &amp;&amp; !in_array( $_SERVER['REMOTE_ADDR'], $this-&gt;config-&gt;item( 'proxy_ips' ) ) )
 {
 log_message( "error", "Daemon called from untrusted IP-address: " . $_SERVER['REMOTE_ADDR'] );
 show_404( '/daemon' );
 return;
 }

 $this-&gt;load-&gt;library( 'encrypt' );
 $params = unserialize( urldecode( $this-&gt;encrypt-&gt;decode( $_POST['data'] ) ) );
 unset( $_POST );
 $model = array_shift( $params );
 $method = array_shift( $params );
 $this-&gt;load-&gt;model( $model );
 if ( call_user_func_array( array( $this-&gt;$model, $method ), $params ) === FALSE )
 {
 log_message( "error", "Daemon could not call: " . $model . "::" . $method . "()" );
 }
 }
 catch(Exception $e)
 {
 log_message( "error", "Daemon has error: " . $e-&gt;getMessage( ) . $e-&gt;getFile( ) . $e-&gt;getLine( ) );
 }
 }
}
</code></pre>

And a library that does the async calls

<pre><code>class Daemon
{
 public function execute_background( /* model, method, params */ )
 {
 $ci = &amp;get_instance( );
 // The callback URL (its ourselves)
 $parts = parse_url( $ci-&gt;config-&gt;item( 'base_url' ) . "/daemon" );
 if ( strcmp( $parts['scheme'], 'https' ) == 0 )
 {
 $port = 443;
 $host = "ssl://" . $parts['host'];
 }
 else 
 {
 $port = 80;
 $host = $parts['host'];
 }
 if ( ( $fp = fsockopen( $host, isset( $parts['port'] ) ? $parts['port'] : $port, $errno, $errstr, 30 ) ) === FALSE )
 {
 throw new Exception( "Internal server error: background process could not be started" );
 }
 $ci-&gt;load-&gt;library( 'encrypt' );
 $post_string = "data=" . urlencode( $ci-&gt;encrypt-&gt;encode( serialize( func_get_args( ) ) ) );
 $out = "POST " . $parts['path'] . " HTTP/1.1\r\n";
 $out .= "Host: " . $host . "\r\n";
 $out .= "Content-Type: application/x-www-form-urlencoded\r\n";
 $out .= "Content-Length: " . strlen( $post_string ) . "\r\n";
 $out .= "Connection: Close\r\n\r\n";
 $out .= $post_string;
 fwrite( $fp, $out );
 fclose( $fp );
 }
}
</code></pre>

This method can be called to process any model::method() in the 'background'. It uses variable arguments.

<pre><code>$this-&gt;load-&gt;library('daemon');
$this-&gt;daemon-&gt;execute_background( 'model', 'method', $arg1, $arg2, ... );
</code></pre>

blocks|key|1322430|text|这对我来说很好，遗憾的是你不能从你的请求中检索响应：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1322431|<?php
header("http://mahwebsite.net/myapp.php?var=dsafs");
?>|code-block|syntax|javascript|1322432|它的工作速度非常快，不需要原始的tcp套接字:)|1322433|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

This works fine for me, sadly you cannot retrieve the response from your request:

<pre><code>&lt;?php
header("http://mahwebsite.net/myapp.php?var=dsafs");
?&gt;
</code></pre>

It works very fast, no need for raw tcp sockets :)

blocks|key|1322608|text|建议:设置一个框架集HTML页面的格式，假设其中包含9个框架。每个框架都将获得myapp.php页面的一个不同的“实例”。将有9个不同的线程在Web服务器上并行运行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1322609|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Suggestion: format a FRAMESET HTML page which contains, let´s say, 9 frames inside. Each frame will GET a different "instance" of your myapp.php page. There will be 9 different threads running on the Web server, in parallel.

blocks|key|1537973|text|如果您使用的是Linux环境，那么您可以使用PHP的exec命令来调用linux+curl。下面是一个示例代码，它将创建一个异步HTTP+post。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1537974|function+_async_http_post($url,+$json_string)+{
++$run+=+"curl+-X+POST+-H+'Content-Type:+application/json'";
++$run.=+"+-d+'"+.$json_string.+"'+"+.+"'"+.+$url+.+"'";
++$run.=+"+>+/dev/null+2>&1+&";
++exec($run,+$output,+$exit);
++return+$exit+==+0;
}|code-block|syntax|javascript|1537975|这段代码不需要任何额外的PHP库，它可以在10毫秒内完成http+post。|1537976|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If you are using Linux environment then you can use the PHP's exec command to invoke the linux curl. Here is a sample code, which will make a Asynchronous HTTP post. 

<pre><code>function _async_http_post($url, $json_string) {
 $run = "curl -X POST -H 'Content-Type: application/json'";
 $run.= " -d '" .$json_string. "' " . "'" . $url . "'";
 $run.= " &gt; /dev/null 2&gt;&amp;1 &amp;";
 exec($run, $output, $exit);
 return $exit == 0;
}
</code></pre>

This code does not need any extra PHP libs and it can complete the http post in less than 10 milliseconds.

blocks|key|1538028|text|只需对上面发布的脚本进行一些更正。下面的方法对我很有效|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1538029|function+curl_request_async($url,+$params,+$type='GET')
++++{
++++++++$post_params+=+array();
++++++++foreach+($params+as+$key+=>+&$val)+{
++++++++++++if+(is_array($val))+$val+=+implode(',',+$val);
++++++++++++$post_params[]+=+$key.'='.urlencode($val);
++++++++}
++++++++$post_string+=+implode('&',+$post_params);

++++++++$parts=parse_url($url);
++++++++echo+print_r($parts,+TRUE);
++++++++$fp+=+fsockopen($parts['host'],
++++++++++++(isset($parts['scheme'])+&&+$parts['scheme']+==+'https')?+443+:+80,
++++++++++++$errno,+$errstr,+30);

++++++++$out+=+"$type+".$parts['path']+.+(isset($parts['query'])+?+'?'.$parts['query']+:+'')+."+HTTP/1.1\r\n";
++++++++$out.=+"Host:+".$parts['host']."\r\n";
++++++++$out.=+"Content-Type:+application/x-www-form-urlencoded\r\n";
++++++++$out.=+"Content-Length:+".strlen($post_string)."\r\n";
++++++++$out.=+"Connection:+Close\r\n\r\n";
++++++++//+Data+goes+in+the+request+body+for+a+POST+request
++++++++if+('POST'+==+$type+&&+isset($post_string))+$out.=+$post_string;
++++++++fwrite($fp,+$out);
++++++++fclose($fp);
++++}|code-block|syntax|javascript|1538030|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Just a few corrections on scripts posted above. The following is working for me

<pre><code>function curl_request_async($url, $params, $type='GET')
 {
 $post_params = array();
 foreach ($params as $key =&gt; &amp;$val) {
 if (is_array($val)) $val = implode(',', $val);
 $post_params[] = $key.'='.urlencode($val);
 }
 $post_string = implode('&amp;', $post_params);

 $parts=parse_url($url);
 echo print_r($parts, TRUE);
 $fp = fsockopen($parts['host'],
 (isset($parts['scheme']) &amp;&amp; $parts['scheme'] == 'https')? 443 : 80,
 $errno, $errstr, 30);

 $out = "$type ".$parts['path'] . (isset($parts['query']) ? '?'.$parts['query'] : '') ." HTTP/1.1\r\n";
 $out.= "Host: ".$parts['host']."\r\n";
 $out.= "Content-Type: application/x-www-form-urlencoded\r\n";
 $out.= "Content-Length: ".strlen($post_string)."\r\n";
 $out.= "Connection: Close\r\n\r\n";
 // Data goes in the request body for a POST request
 if ('POST' == $type &amp;&amp; isset($post_string)) $out.= $post_string;
 fwrite($fp, $out);
 fclose($fp);
 }
</code></pre>

blocks|key|1538078|text|似乎没有人提到Guzzle，它是一个PHP+HTTP客户端，可以方便地发送HTTP请求。它可以使用或不使用Curl。它既可以发送同步请求，也可以发送异步请求。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1538079|$client+=+new+GuzzleHttp\Client();
$promise+=+$client->requestAsync('GET',+'http://httpbin.org/get');
$promise->then(
++++function+(ResponseInterface+$res)+{
++++++++echo+$res->getStatusCode()+.+"\n";
++++},
++++function+(RequestException+$e)+{
++++++++echo+$e->getMessage()+.+"\n";
++++++++echo+$e->getRequest()->getMethod();
++++}
);|code-block|syntax|javascript|1538080|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.guzzlephp.org/en/stable/index.html^0|1H|4|7|6|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

Nobody seems to mention <a href="http://docs.guzzlephp.org/en/stable/index.html" rel="nofollow noreferrer">Guzzle</a>, which is a PHP HTTP client that makes it easy to send HTTP requests. It can work with or without <code>Curl</code>. It can send both synchronous and asynchronous requests.

<pre><code>$client = new GuzzleHttp\Client();
$promise = $client-&gt;requestAsync('GET', 'http://httpbin.org/get');
$promise-&gt;then(
 function (ResponseInterface $res) {
 echo $res-&gt;getStatusCode() . "\n";
 },
 function (RequestException $e) {
 echo $e-&gt;getMessage() . "\n";
 echo $e-&gt;getRequest()-&gt;getMethod();
 }
);
</code></pre>

I wish to make a simple GET request to another script on a different server. How do I do this?

In one case, I just need to request an external script without the need for any output.

<pre><code>make_request('http://www.externalsite.com/script1.php?variable=45'); //example usage
</code></pre>

In the second case, I need to get the text output.

<pre><code>$output = make_request('http://www.externalsite.com/script2.php?variable=45');
echo $output; //string output
</code></pre>

To be honest, I do not want to mess around with CURL as this isn't really the job of CURL. I also do not want to make use of http_get as I do not have the PECL extensions.

Would fsockopen work? If so, how do I do this without reading in the contents of the file? Is there no other way?

Thanks all

<h2>Update</h2>

I should of added, in the first case, I do not want to wait for the script to return anything. As I understand file_get_contents() will wait for the page to load fully etc?

How do I make an asynchronous GET request in PHP?

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我希望向不同服务器上的另一个脚本发出一个简单的GET请求。我该怎么做呢？在一种情况下，我只需要请求一个外部脚本，而不需要任何输出。make_request('http://www.externalsite.com/script1.php?variable=45'); //example usage在第二种情况下，我需要...

问如何在PHP中发出异步GET请求？
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