小开

你可以使用exec()来调用一些可以执行HTTP请求的东西，如wget，但你必须将程序的所有输出指向某个地方，如文件或/dev/null，否则PHP进程将等待该输出。

如果你想把进程和apache线程完全分开，可以尝试这样做(我不确定，但我希望你能明白):

exec('bash -c "wget -O (url goes here) > /dev/null 2>&1 &"');

这不是一项很好的业务，您可能需要类似cron作业的东西来调用heartbeat脚本，该脚本轮询实际的数据库事件队列来执行真正的异步事件。

小开

如果你控制了你想要异步调用的目标(例如你自己的"longtask.php")，你可以从那端关闭连接，两个脚本将并行运行。它是这样工作的:

quick.php通过cURL打开longtask.php(这里没有魔法)
php关闭连接并继续(神奇!)
当连接关闭时，cURL返回quick.php
两项任务同时进行

我试过了，效果不错。但是quick.php不会知道longtask.php正在做什么，除非您在进程之间创建一些通信方式。

在执行其他操作之前，请先在longtask.php中尝试这段代码。它将关闭连接，但仍然继续运行(并抑制任何输出):

while(ob_get_level()) ob_end_clean();
header('Connection: close');
ignore_user_abort();
ob_start();
echo('Connection Closed');
$size = ob_get_length();
header("Content-Length: $size");
ob_end_flush();
flush();

该代码复制自PHP手册的用户贡献了注释并进行了一些改进。

小开

/**
* Asynchronously execute/include a PHP file. Does not record the output of the file anywhere.
*
* @param string $filename              file to execute, relative to calling script
* @param string $options               (optional) arguments to pass to file via the command line
*/
function asyncInclude($filename, $options = '') {
exec("/path/to/php -f {$filename} {$options} >> /dev/null &");
}

小开

最佳答案

我之前接受的答案行不通。它仍在等待回应。不过，这确实有效，取自如何在PHP中进行异步GET请求?

function post_without_wait($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);
}

小开

让我告诉你我的路。

需要在服务器上安装nodejs

(我的服务器发送1000个HTTPS请求只需要2秒)

url.php:

<?
$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.. }
?>

urlscript.js >

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('<%s> 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);
}

小开

好吧，超时可以设置为毫秒，参见http://www.php.net/manual/en/function.curl-setopt

中的"CURLOPT_CONNECTTIMEOUT_MS"

小开

swoole扩展。https://github.com/matyhtf/swoole 异步的,

$client = new swoole_client(SWOOLE_SOCK_TCP, SWOOLE_SOCK_ASYNC);


$client->on("connect", function($cli) {
$cli->send("hello world\n");
});


$client->on("receive", function($cli, $data){
echo "Receive: $data\n";
});


$client->on("error", function($cli){
echo "connect fail\n";
});


$client->on("close", function($cli){
echo "close\n";
});


$client->connect('127.0.0.1', 9501, 0.5);

小开

这是我自己的PHP函数，当我做POST到任何页面的特定URL .... 示例:my Function的***用法

    <?php
parse_str("email=myemail@ehehehahaha.com&subject=this is just a test");
$_POST['email']=$email;
$_POST['subject']=$subject;
echo HTTP_POST("http://example.com/mail.php",$_POST);***


exit;
?>
<?php
/*********HTTP POST using FSOCKOPEN **************/
// by ArbZ


function HTTP_Post($URL,$data, $referrer="") {


// parsing the given URL
$URL_Info=parse_url($URL);


// Building referrer
if($referrer=="") // if not given use this script as referrer
$referrer=$_SERVER["SCRIPT_URI"];


// making string from $data
foreach($data as $key=>$value)
$values[]="$key=".urlencode($value);
$data_string=implode("&",$values);


// Find out which port is needed - if not given use standard (=80)
if(!isset($URL_Info["port"]))
$URL_Info["port"]=80;


// building POST-request: HTTP_HEADERs
$request.="POST ".$URL_Info["path"]." HTTP/1.1\n";
$request.="Host: ".$URL_Info["host"]."\n";
$request.="Referer: $referer\n";
$request.="Content-type: application/x-www-form-urlencoded\n";
$request.="Content-length: ".strlen($data_string)."\n";
$request.="Connection: close\n";
$request.="\n";
$request.=$data_string."\n";


$fp = fsockopen($URL_Info["host"],$URL_Info["port"]);
fputs($fp, $request);
while(!feof($fp)) {
$result .= fgets($fp, 128);
}
fclose($fp); //$eco = nl2br();




function getTextBetweenTags($string, $tagname) {
$pattern = "/<$tagname ?.*>(.*)<\/$tagname>/";
preg_match($pattern, $string, $matches);
return $matches[1];
}
//STORE THE FETCHED CONTENTS to a VARIABLE, because its way better and fast...
$str = $result;
$txt = getTextBetweenTags($str, "span"); $eco = $txt;  $result = explode("&",$result);
return $result[1];
<span style=background-color:LightYellow;color:blue>".trim($_GET['em'])."</span>
</pre> ";
}
</pre>

小开

下面是一个工作示例，只需运行它，然后打开storage.txt，检查神奇的结果

<?php
function curlGet($target){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec ($ch);
curl_close ($ch);
return $result;
}


// Its the next 3 lines that do the magic
ignore_user_abort(true);
header("Connection: close"); header("Content-Length: 0");
echo str_repeat("s", 100000); flush();


$i = $_GET['i'];
if(!is_numeric($i)) $i = 1;
if($i > 4) exit;
if($i == 1) file_put_contents('storage.txt', '');


file_put_contents('storage.txt', file_get_contents('storage.txt') . time() . "\n");


sleep(5);
curlGet($_SERVER['HTTP_HOST'] . $_SERVER['SCRIPT_NAME'] . '?i=' . ($i + 1));
curlGet($_SERVER['HTTP_HOST'] . $_SERVER['SCRIPT_NAME'] . '?i=' . ($i + 1));

小开

你可以在PHP中使用非阻塞套接字和pecl扩展之一:

< a href = " http://php.net/event " rel =“nofollow”> http://php.net/event < / >
http://php.net/libevent
< a href = " http://php.net/ev " rel =“nofollow”> http://php.net/ev < / >
https://github.com/m4rw3r/php-libev

你可以使用库，它在你的代码和pecl扩展之间提供一个抽象层:https://github.com/reactphp/event-loop

你也可以基于前面的库https://github.com/reactphp/http-client使用异步http-client

查看ReactPHP: http://reactphp.org的其他库

使用异步模型要小心。我推荐在youtube上看这个视频:http://www.youtube.com/watch?v=MWNcItWuKpI

小开

使用CURL设置低CURLOPT_TIMEOUT_MS来伪造请求中止

设置ignore_user_abort(true)在连接关闭后继续处理。

使用这种方法，不需要通过头文件和缓冲区来实现连接处理，这太依赖于操作系统，浏览器和PHP版本

主进程

function async_curl($background_process=''){


//-------------get curl contents----------------


$ch = curl_init($background_process);
curl_setopt_array($ch, array(
CURLOPT_HEADER => 0,
CURLOPT_RETURNTRANSFER =>true,
CURLOPT_NOSIGNAL => 1, //to timeout immediately if the value is < 1000 ms
CURLOPT_TIMEOUT_MS => 50, //The maximum number of mseconds to allow cURL functions to execute
CURLOPT_VERBOSE => 1,
CURLOPT_HEADER => 1
));
$out = curl_exec($ch);


//-------------parse curl contents----------------


//$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
//$header = substr($out, 0, $header_size);
//$body = substr($out, $header_size);


curl_close($ch);


return true;
}


async_curl('http://example.com/background_process_1.php');

后台进程

ignore_user_abort(true);


//do something...

注

如果您希望cURL在不到一秒的时间内超时，您可以使用 CURLOPT_TIMEOUT_MS，尽管在类unix上有一个bug/“特性” 如果值为<，则会导致libcurl立即超时; 1000毫秒，错误“cURL错误(28):超时已达”。的这种行为的解释是:

[…]

解决方案是使用CURLOPT_NOSIGNAL禁用信号

资源

卷曲超时小于1000ms总是失败?< / >

http://www.php.net/manual/en/function.curl-setopt.php#104597

http://php.net/manual/en/features.connection-handling.php

小开

class async_file_get_contents extends Thread{
public $ret;
public $url;
public $finished;
public function __construct($url) {
$this->finished=false;
$this->url=$url;
}
public function run() {
$this->ret=file_get_contents($this->url);
$this->finished=true;
}
}
$afgc=new async_file_get_contents("http://example.org/file.ext");

小开

你可以使用这个库:https://github.com/stil/curl-easy

这很简单:

<?php
$request = new cURL\Request('http://yahoo.com/');
$request->getOptions()->set(CURLOPT_RETURNTRANSFER, true);


// Specify function to be called when your request is complete
$request->addListener('complete', function (cURL\Event $event) {
$response = $event->response;
$httpCode = $response->getInfo(CURLINFO_HTTP_CODE);
$html = $response->getContent();
echo "\nDone.\n";
});


// Loop below will run as long as request is processed
$timeStart = microtime(true);
while ($request->socketPerform()) {
printf("Running time: %dms    \r", (microtime(true) - $timeStart)*1000);
// Here you can do anything else, while your request is in progress
}

下面你可以看到上面例子的控制台输出。它将显示简单的活动时钟，指示请求正在运行的时间:

animation

小开

事件的扩展

事件扩展是非常合适的。它是Libevent库的一个端口，用于事件驱动的I/O，主要用于网络。

我已经写了一个示例HTTP客户端，允许调度一些

. HTTP请求并异步运行

这是一个基于事件扩展的示例HTTP客户端类。

该类允许调度大量HTTP请求，然后异步运行它们。

http-client.php

<?php
class MyHttpClient {
/// @var EventBase
protected $base;
/// @var array Instances of EventHttpConnection
protected $connections = [];


public function __construct() {
$this->base = new EventBase();
}


/**
* Dispatches all pending requests (events)
*
* @return void
*/
public function run() {
$this->base->dispatch();
}


public function __destruct() {
// Destroy connection objects explicitly, don't wait for GC.
// Otherwise, EventBase may be free'd earlier.
$this->connections = null;
}


/**
* @brief Adds a pending HTTP request
*
* @param string $address Hostname, or IP
* @param int $port Port number
* @param array $headers Extra HTTP headers
* @param int $cmd A EventHttpRequest::CMD_* constant
* @param string $resource HTTP request resource, e.g. '/page?a=b&c=d'
*
* @return EventHttpRequest|false
*/
public function addRequest($address, $port, array $headers,
$cmd = EventHttpRequest::CMD_GET, $resource = '/')
{
$conn = new EventHttpConnection($this->base, null, $address, $port);
$conn->setTimeout(5);


$req = new EventHttpRequest([$this, '_requestHandler'], $this->base);


foreach ($headers as $k => $v) {
$req->addHeader($k, $v, EventHttpRequest::OUTPUT_HEADER);
}
$req->addHeader('Host', $address, EventHttpRequest::OUTPUT_HEADER);
$req->addHeader('Connection', 'close', EventHttpRequest::OUTPUT_HEADER);
if ($conn->makeRequest($req, $cmd, $resource)) {
$this->connections []= $conn;
return $req;
}


return false;
}




/**
* @brief Handles an HTTP request
*
* @param EventHttpRequest $req
* @param mixed $unused
*
* @return void
*/
public function _requestHandler($req, $unused) {
if (is_null($req)) {
echo "Timed out\n";
} else {
$response_code = $req->getResponseCode();


if ($response_code == 0) {
echo "Connection refused\n";
} elseif ($response_code != 200) {
echo "Unexpected response: $response_code\n";
} else {
echo "Success: $response_code\n";
$buf = $req->getInputBuffer();
echo "Body:\n";
while ($s = $buf->readLine(EventBuffer::EOL_ANY)) {
echo $s, PHP_EOL;
}
}
}
}
}




$address = "my-host.local";
$port = 80;
$headers = [ 'User-Agent' => 'My-User-Agent/1.0', ];


$client = new MyHttpClient();


// Add pending requests
for ($i = 0; $i < 10; $i++) {
$client->addRequest($address, $port, $headers,
EventHttpRequest::CMD_GET, '/test.php?a=' . $i);
}


// Dispatch pending requests
$client->run();

test.php

这是服务器端的示例脚本。

<?php
echo 'GET: ', var_export($_GET, true), PHP_EOL;
echo 'User-Agent: ', $_SERVER['HTTP_USER_AGENT'] ?? '(none)', PHP_EOL;

使用

php http-client.php

样例输出

Success: 200
Body:
GET: array (
'a' => '1',
)
User-Agent: My-User-Agent/1.0
Success: 200
Body:
GET: array (
'a' => '0',
)
User-Agent: My-User-Agent/1.0
Success: 200
Body:
GET: array (
'a' => '3',
)
...

(修剪)。

注意，该代码是为CLI SAPI中的长期处理而设计的。

对于自定义协议，可以考虑使用低级API，例如缓冲事件，缓冲区。对于SSL/TLS通信，我建议将低级API与Event的ssl上下文结合使用。例子:

尽管Libevent的HTTP API很简单，但它不像缓冲区事件那么灵活。例如，HTTP API目前不支持自定义HTTP方法。但是使用底层API实现几乎任何协议都是可能的。

电动汽车推广

我还编写了另一个HTTP客户端示例，使用电动汽车扩展和套接字在非阻塞模式中。该代码比基于Event的示例稍微冗长一些，因为Ev是一个通用的事件循环。它不提供特定于网络的函数，但它的EvIo监控器能够监听封装在套接字资源中的文件描述符。

这是一个基于电动汽车扩展的示例HTTP客户端。

Ev扩展实现了一个简单而强大的通用事件循环。它不提供特定于网络的监视器，但它的I / O观察家可以用于套接字的异步处理。

下面的代码展示了如何将HTTP请求安排为并行处理。

http-client.php

<?php
class MyHttpRequest {
/// @var MyHttpClient
private $http_client;
/// @var string
private $address;
/// @var string HTTP resource such as /page?get=param
private $resource;
/// @var string HTTP method such as GET, POST etc.
private $method;
/// @var int
private $service_port;
/// @var resource Socket
private $socket;
/// @var double Connection timeout in seconds.
private $timeout = 10.;
/// @var int Chunk size in bytes for socket_recv()
private $chunk_size = 20;
/// @var EvTimer
private $timeout_watcher;
/// @var EvIo
private $write_watcher;
/// @var EvIo
private $read_watcher;
/// @var EvTimer
private $conn_watcher;
/// @var string buffer for incoming data
private $buffer;
/// @var array errors reported by sockets extension in non-blocking mode.
private static $e_nonblocking = [
11, // EAGAIN or EWOULDBLOCK
115, // EINPROGRESS
];


/**
* @param MyHttpClient $client
* @param string $host Hostname, e.g. google.co.uk
* @param string $resource HTTP resource, e.g. /page?a=b&c=d
* @param string $method HTTP method: GET, HEAD, POST, PUT etc.
* @throws RuntimeException
*/
public function __construct(MyHttpClient $client, $host, $resource, $method) {
$this->http_client = $client;
$this->host        = $host;
$this->resource    = $resource;
$this->method      = $method;


// Get the port for the WWW service
$this->service_port = getservbyname('www', 'tcp');


// Get the IP address for the target host
$this->address = gethostbyname($this->host);


// Create a TCP/IP socket
$this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if (!$this->socket) {
throw new RuntimeException("socket_create() failed: reason: " .
socket_strerror(socket_last_error()));
}


// Set O_NONBLOCK flag
socket_set_nonblock($this->socket);


$this->conn_watcher = $this->http_client->getLoop()
->timer(0, 0., [$this, 'connect']);
}


public function __destruct() {
$this->close();
}


private function freeWatcher(&$w) {
if ($w) {
$w->stop();
$w = null;
}
}


/**
* Deallocates all resources of the request
*/
private function close() {
if ($this->socket) {
socket_close($this->socket);
$this->socket = null;
}


$this->freeWatcher($this->timeout_watcher);
$this->freeWatcher($this->read_watcher);
$this->freeWatcher($this->write_watcher);
$this->freeWatcher($this->conn_watcher);
}


/**
* Initializes a connection on socket
* @return bool
*/
public function connect() {
$loop = $this->http_client->getLoop();


$this->timeout_watcher = $loop->timer($this->timeout, 0., [$this, '_onTimeout']);
$this->write_watcher = $loop->io($this->socket, Ev::WRITE, [$this, '_onWritable']);


return socket_connect($this->socket, $this->address, $this->service_port);
}


/**
* Callback for timeout (EvTimer) watcher
*/
public function _onTimeout(EvTimer $w) {
$w->stop();
$this->close();
}


/**
* Callback which is called when the socket becomes wriable
*/
public function _onWritable(EvIo $w) {
$this->timeout_watcher->stop();
$w->stop();


$in = implode("\r\n", [
"{$this->method} {$this->resource} HTTP/1.1",
"Host: {$this->host}",
'Connection: Close',
]) . "\r\n\r\n";


if (!socket_write($this->socket, $in, strlen($in))) {
trigger_error("Failed writing $in to socket", E_USER_ERROR);
return;
}


$loop = $this->http_client->getLoop();
$this->read_watcher = $loop->io($this->socket,
Ev::READ, [$this, '_onReadable']);


// Continue running the loop
$loop->run();
}


/**
* Callback which is called when the socket becomes readable
*/
public function _onReadable(EvIo $w) {
// recv() 20 bytes in non-blocking mode
$ret = socket_recv($this->socket, $out, 20, MSG_DONTWAIT);


if ($ret) {
// Still have data to read. Append the read chunk to the buffer.
$this->buffer .= $out;
} elseif ($ret === 0) {
// All is read
printf("\n<<<<\n%s\n>>>>", rtrim($this->buffer));
fflush(STDOUT);
$w->stop();
$this->close();
return;
}


// Caught EINPROGRESS, EAGAIN, or EWOULDBLOCK
if (in_array(socket_last_error(), static::$e_nonblocking)) {
return;
}


$w->stop();
$this->close();
}
}


/////////////////////////////////////
class MyHttpClient {
/// @var array Instances of MyHttpRequest
private $requests = [];
/// @var EvLoop
private $loop;


public function __construct() {
// Each HTTP client runs its own event loop
$this->loop = new EvLoop();
}


public function __destruct() {
$this->loop->stop();
}


/**
* @return EvLoop
*/
public function getLoop() {
return $this->loop;
}


/**
* Adds a pending request
*/
public function addRequest(MyHttpRequest $r) {
$this->requests []= $r;
}


/**
* Dispatches all pending requests
*/
public function run() {
$this->loop->run();
}
}




/////////////////////////////////////
// Usage
$client = new MyHttpClient();
foreach (range(1, 10) as $i) {
$client->addRequest(new MyHttpRequest($client, 'my-host.local', '/test.php?a=' . $i, 'GET'));
}
$client->run();

测试

假设http://my-host.local/test.php脚本正在打印$_GET的转储:

<?php
echo 'GET: ', var_export($_GET, true), PHP_EOL;

那么php http-client.php命令的输出将类似如下:

<<<<
HTTP/1.1 200 OK
Server: nginx/1.10.1
Date: Fri, 02 Dec 2016 12:39:54 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: close
X-Powered-By: PHP/7.0.13-pl0-gentoo


1d
GET: array (
'a' => '3',
)


0
>>>>
<<<<
HTTP/1.1 200 OK
Server: nginx/1.10.1
Date: Fri, 02 Dec 2016 12:39:54 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: close
X-Powered-By: PHP/7.0.13-pl0-gentoo


1d
GET: array (
'a' => '2',
)


0
>>>>
...

(修剪)

注意，在PHP 5中，套接字扩展可能会记录EINPROGRESS、EAGAIN和EWOULDBLOCK errno值的警告。关闭日志是可能的

error_reporting(E_ERROR);

关于准则的“其余部分”

我只想做一些类似file_get_contents()的事情，但不等待请求完成后再执行其余的代码。

应该与网络请求并行运行的代码可以在事件计时器或Ev的闲置的观察者的回调中执行。通过观看上面提到的例子，你可以很容易地找到答案。否则，我将添加另一个例子:)

小开

截至2018年，狂饮已经成为HTTP请求事实上的标准库，在几个现代框架中使用。它是用纯PHP编写的，不需要安装任何自定义扩展。

它可以很好地进行异步HTTP调用，甚至池他们，例如当你需要进行100个HTTP调用，但不想一次运行超过5个。

并发请求示例

use GuzzleHttp\Client;
use GuzzleHttp\Promise;


$client = new Client(['base_uri' => 'http://httpbin.org/']);


// Initiate each request but do not block
$promises = [
'image' => $client->getAsync('/image'),
'png'   => $client->getAsync('/image/png'),
'jpeg'  => $client->getAsync('/image/jpeg'),
'webp'  => $client->getAsync('/image/webp')
];


// Wait on all of the requests to complete. Throws a ConnectException
// if any of the requests fail
$results = Promise\unwrap($promises);


// Wait for the requests to complete, even if some of them fail
$results = Promise\settle($promises)->wait();


// You can access each result using the key provided to the unwrap
// function.
echo $results['image']['value']->getHeader('Content-Length')[0]
echo $results['png']['value']->getHeader('Content-Length')[0]

看到http://docs.guzzlephp.org/en/stable/quickstart.html#concurrent-requests

小开

ReactPHP async http客户端
https://github.com/shuchkin/react-http-client < / p > 通过Composer安装

$ composer require shuchkin/react-http-client

异步HTTP GET

// get.php
$loop = \React\EventLoop\Factory::create();


$http = new \Shuchkin\ReactHTTP\Client( $loop );


$http->get( 'https://tools.ietf.org/rfc/rfc2068.txt' )->then(
function( $content ) {
echo $content;
},
function ( \Exception $ex ) {
echo 'HTTP error '.$ex->getCode().' '.$ex->getMessage();
}
);


$loop->run();

以cli模式运行php

$ php get.php

小开

我发现这个包非常有用和非常简单:https://github.com/amphp/parallel-functions

<?php


use function Amp\ParallelFunctions\parallelMap;
use function Amp\Promise\wait;


$responses = wait(parallelMap([
'https://google.com/',
'https://github.com/',
'https://stackoverflow.com/',
], function ($url) {
return file_get_contents($url);
}));

它将并行加载所有3个url。你也可以在闭包中使用类实例方法

例如，我使用Laravel扩展基于这个包https://github.com/spatie/laravel-collection-macros#parallelmap

这是我的代码:

    /**
* Get domains with all needed data
*/
protected function getDomainsWithdata(): Collection
{
return $this->opensrs->getDomains()->parallelMap(function ($domain) {
$contact = $this->opensrs->getDomainContact($domain);
$contact['domain'] = $domain;
return $contact;
}, 10);
}

它在10个并行线程中加载所有需要的数据，而不是在没有异步的情况下50秒，它在8秒内完成。

小开

Symfony HttpClient是异步的https://symfony.com/doc/current/components/http_client.html。

例如，你可以

use Symfony\Component\HttpClient\HttpClient;


$client = HttpClient::create();
$response1 = $client->request('GET', 'https://website1');
$response2 = $client->request('GET', 'https://website1');
$response3 = $client->request('GET', 'https://website1');
//these 3 calls with return immediately
//but the requests will fire to the website1 webserver


$response1->getContent(); //this will block until content is fetched
$response2->getContent(); //same
$response3->getContent(); //same

如何在PHP中进行异步HTTP请求

事件的扩展

http-client.php

test.php

使用

电动汽车推广

http-client.php

测试

关于准则的“其余部分”

并发请求示例