PHP Concurrent HTTP requests?

Question

I was wondering what the best way to do concurrent HTTP requests in PHP? I have a lot of data to get and i'd rather do multiple requests at once to retrieve it all.

Does anybody know how I can do this? Preferably in an anonymous/callback function mannor...

Thanks,

Tom.

Like [`curl`](http://php.net/curl) the [`http`](http://php.net/http) extension also provides for concurrent requests, using the [`HttpRequestPool`](http://php.net/HttpRequestPool) class (which in turn just uses curl behind the scenes). — mario, Oct 06 '11 at 23:36
Possible duplicate: http://stackoverflow.com/questions/1240267/asynchronous-http-requests-in-php — igorw, Oct 06 '11 at 23:37
possible duplicate of [Parallel HTTP requests in PHP using PECL HTTP classes \[Answer: HttpRequestPool class\]](http://stackoverflow.com/questions/168951/parallel-http-requests-in-php-using-pecl-http-classes-answer-httprequestpool-cl) — mario, Oct 06 '11 at 23:37

score 12 · Accepted Answer · answered Oct 06 '11 at 23:34

12

You can use curl_multi, which internally fires off multiple separate requests under a single curl handle.

But otherwise PHP itself not in any way/shape/form "multithreaded" and will not allow things to run in parallel, except via gross hacks (multiple parallel scripts, one script firing up multiple background tasks via exec(), etc...).

answered Oct 06 '11 at 23:34

Marc B

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Things are changed, now PHP can make async calls using the Fibers which is included in PHP 8.1 – Anees Sadeek Jun 13 '23 at 06:28

score 2 · Answer 2 · answered Oct 06 '11 at 23:59

2

You can try either curl_multi() or use a lower level function socket_select()

answered Oct 06 '11 at 23:59

Alexei Tenitski

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score 1 · Answer 3 · answered Nov 26 '13 at 22:27

1

you can use HttpRequestPool http://www.php.net/manual/de/httprequestpool.construct.php

$multiRequests = array(
  new HttpRequest('http://www.google.com', HttpRequest::METH_GET),
  new HttpRequest('http://www.yahoo.com', HttpRequest::METH_GET)
  new HttpRequest('http://www.bing.com', HttpRequest::METH_GET)
);

$pool = new HttpRequestPool();
foreach ($multiRequests as $request)
{
  $pool->attach($request);
}

$pool->send();

foreach($pool as $request) 
{
  echo $request->getResponseBody();
}

answered Nov 26 '13 at 22:27

Tobias Gassmann

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I am getting this error while testing this code : Fatal error: Class 'HttpRequest' not found. – Vijaysinh Parmar May 19 '16 at 04:47
You are probably using version 2 of pecl_http. In case you want to use HttpRequest you need to install pecl_http 1.7.6, I think. Version 2 has been completly rewritten years ago, nevertheless the documentation on php.net refers to version 1 – Tobias Gassmann May 19 '16 at 05:21

score 1 · Answer 4 · answered Oct 24 '17 at 13:49

Or if you want you can send you data as json. In php you can defragment it into all the values again. for eg.

xhttp.open("GET", "gotoChatRoomorNot.php?q=[{"+str+"},{"+user1+"},{"+user2"}]", true);

and in php you can follow this to get your data back: How do I extract data from JSON with PHP?

So make a string in json format and send the entire thing through http. I think you can perform the same kind of behaviour with xml, but i am not aware of xml

PHP Concurrent HTTP requests?

4 Answers4

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