PHP中有没有办法进行异步HTTP调用？我不关心响应，我只想做类似的事情file_get_contents()，但在执行我的其余代码之前不要等待请求完成。这对于在我的应用程序中触发某种“事件”或触发长流程非常有用。
有任何想法吗？
UltimateBrent
问问题
208069 次
18 回答
42
我之前接受的答案不起作用。它仍在等待响应。这确实有效，取自How do I make an asynchronous GET request in PHP?
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);
}
于 2010-05-27T21:14:03.160 回答
28
如果您控制要异步调用的目标（例如您自己的“longtask.php”），您可以从该端关闭连接，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）
- longtask.php 关闭连接并继续（神奇！）
- 连接关闭时 cURL 返回 quick.php
- 两个任务并行继续
我已经尝试过了，它工作得很好。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某种通信方式。
在执行其他任何操作之前，请在 longtask.php 中尝试此代码。它将关闭连接，但仍会继续运行（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();
该代码是从PHP 手册的用户贡献的注释中复制而来的，并有所改进。
于 2010-02-13T18:22:58.120 回答
20
您可以通过使用 exec() 来调用可以执行 HTTP 请求的东西来做一些诡计，例如wget，但是您必须将程序的所有输出定向到某个位置，例如文件或 /dev/null，否则 PHP 进程将等待该输出.
如果您想将进程与 apache 线程完全分开，请尝试类似（我对此不确定，但希望您明白）：
exec('bash -c "wget -O (url goes here) > /dev/null 2>&1 &"');
这不是一个好生意，您可能需要像 cron 作业这样调用心跳脚本的东西，该脚本轮询实际的数据库事件队列以执行真正的异步事件。
于 2008-09-23T23:35:26.947 回答
14
截至 2018 年，Guzzle已成为 HTTP 请求的事实上的标准库，用于多个现代框架。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，甚至可以在需要进行 100 个 HTTP 调用但不想一次运行超过 5 个时将它们汇集起来。
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]
请参阅http://docs.guzzlephp.org/en/stable/quickstart.html#concurrent-requests
于 2018-07-09T06:02:24.450 回答
13
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
}
您可以在下面看到上述示例的控制台输出。它将显示简单的实时时钟，指示请求正在运行多少时间：
于 2015-05-19T00:27:32.257 回答
11
/**
* 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} {$options} >> /dev/null &");
}
于 2010-03-13T07:18:03.687 回答
9
CURL使用设置低来伪造请求中止CURLOPT_TIMEOUT_MS设置
ignore_user_abort(true)为在连接关闭后继续处理。
使用此方法，无需过于依赖操作系统、浏览器和 PHP 版本，通过标头和缓冲区实现连接处理
主进程
function async_curl($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...
注意
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“类 Unix 系统”上存在一个错误/“功能”，如果该值小于 1000 毫秒，则会导致 libcurl 立即超时并出现错误“ cURL 错误 (28): 已超时”。这种行为的解释是：
[...]
解决方案是使用 CURLOPT_NOSIGNAL 禁用信号
资源
于 2015-02-21T13:36:54.697 回答
5
swoole 扩展。https://github.com/matyhtf/swoole PHP 的异步和并发网络框架。
$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);
于 2014-03-03T06:06:10.823 回答
4
让我告诉你我的方式:)
需要在服务器上安装 nodejs
（我的服务器发送 1000 个 https 获取请求仅需 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);
}
于 2012-02-08T19:20:42.280 回答
4
您可以使用非阻塞套接字和 PHP 的 pecl 扩展之一：
您可以使用在代码和 pecl 扩展之间为您提供抽象层的库：https ://github.com/reactphp/event-loop
你也可以使用异步 http-client，基于之前的库：https ://github.com/reactphp/http-client
查看其他 ReactPHP 库：http: //reactphp.org
小心使用异步模型。我建议在 youtube 上观看此视频：http ://www.youtube.com/watch?v=MWNcItWuKpI
于 2014-06-18T15:20:42.127 回答
3
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");
于 2015-02-27T12:35:17.583 回答
3
事件扩展
事件扩展非常合适。它是Libevent库的一个端口，专为事件驱动 I/O 而设计，主要用于网络。
我编写了一个示例 HTTP 客户端，它允许调度多个 HTTP 请求并异步运行它们。
这是一个基于事件扩展的示例 HTTP 客户端类。
该类允许调度多个 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
$client->run();
测试.php
这是服务器端的示例脚本。
<?php
echo 'GET: ', var_export($_GET, true), PHP_EOL;
echo 'User-Agent: ', $_SERVER['HTTP_USER_AGENT'] ?? '(none)', PHP_EOL;
用法
php http-client.php
样本输出
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。）
请注意，该代码专为CLI SAPI中的长期处理而设计。
对于自定义协议，请考虑使用低级 API，即缓冲区事件、缓冲区。对于 SSL/TLS 通信，我建议将低级 API 与 Event 的ssl context结合使用。例子：
虽然 Libevent 的 HTTP API 很简单，但它不如缓冲区事件灵活。例如，HTTP API 当前不支持自定义 HTTP 方法。但是几乎可以使用低级 API 实现任何协议。
电动车扩展
我还编写了另一个 HTTP 客户端的示例，该客户端使用Ev扩展和非阻塞模式的套接字。该代码比基于 Event 的示例稍微冗长，因为 Ev 是一个通用的事件循环。它不提供特定于网络的功能，但它的观察者尤其能够监听封装到套接字资源中的文件描述符。EvIo
这是一个基于Ev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观察者，但它的I/O 观察者可用于套接字的异步处理。
以下代码显示了如何安排 HTTP 请求以进行并行处理。
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'));
}
$client->run();
测试
假设http://my-host.local/test.php脚本正在打印以下内容的转储$_GET：
<?php
echo 'GET: ', var_export($_GET, true), PHP_EOL;
然后php http-client.php命令的输出将类似于以下内容：
<<<<
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）
请注意，在 PHP 5 中，套接字扩展可能会记录EINPROGRESS、EAGAIN和EWOULDBLOCK errno值的警告。可以使用以下命令关闭日志
error_reporting(E_ERROR);
关于守则的“其余部分”
我只想做类似的事情
file_get_contents()，但不要等待请求完成后再执行我的其余代码。
例如，应该与网络请求并行运行的代码可以在Event timer或 Ev 的idle watcher的回调中执行。您可以通过观看上面提到的示例轻松弄清楚。否则，我将添加另一个示例:)
于 2016-12-02T07:58:07.293 回答
2
我发现这个包非常有用且非常简单：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。您还可以在闭包中使用类实例方法。
例如，我使用基于此包的 Laravel 扩展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 50 秒没有异步它只在 8 秒内完成。
于 2019-08-29T20:28:07.257 回答
1
当我向任何页面的特定 URL 进行 POST 时，这是我自己的 PHP 函数......示例：*** 我的函数的使用......
<?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>
于 2014-05-13T23:38:24.153 回答
1
这是一个工作示例，只需运行它并随后打开 storage.txt 即可查看神奇的结果
<?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));
于 2014-06-09T23:56:38.397 回答
1
ReactPHP 异步 http 客户端
https://github.com/shuchkin/react-http-client
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();
在 CLI 模式下运行 php
$ php get.php
于 2018-12-28T18:15:13.433 回答
1
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
于 2020-04-18T19:37:54.150 回答
-4
于 2012-04-30T11:34:23.610 回答