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Running async function in php

Is it possible to create some php class that can run functions asynchronously? Here is what I have done so far:

class Worker extends Thread
{
    protected  $asyncFun;
    protected $paramsArray;

    public function run() {
        $asyncFun(/*parameters go here*/)
    }

    public function setAsyncFunction($func, $paramsArr)
    {
        $this->asyncFun = $func;
        $this->paramsArray = $paramsArr;
    }
}

Here is what I want to call it:

$worker = new Worker();
$worker->setAsyncFunction(foo, ["a", "b"]);
$worker::start();
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2 answers

Recent versions of pthreads support closing as members, making the code very simple:

<?php
class Background extends Thread {

    public function __construct(callable $call, array $args = []) {
        $this->call = $call;
        $this->args = $args;
    }

    public function run() {
        call_user_func_array($this->call, $this->args);
    }

    protected $call;
    protected $args;
}

$background = new Background(function($greeting){
    printf("%s\n", $greeting);
}, ["Hello World"]);
$background->start();
$background->join();

function named($greeting) {
    printf("%s\n", $greeting);
}

$background = new Background("named", ["Goodbye World"]);
$background->start();
$background->join();
?>

However, this is terrible, it is difficult to imagine any function that is so hungry that it needs its own flow.

You started the right path with the thought that you should reuse the context and create a workflow, pthreads has it all built in.

More reasonable code using inline classes is more like:

<?php
class Background extends Threaded {

    public function __construct(callable $call, array $args = []) {
        $this->call = $call;
        $this->args = $args;
    }

    public function run() {
        call_user_func_array($this->call, $this->args);
    }

    protected $call;
    protected $args;
}

$pool = new Pool(4);

$pool->submit(new Background(function($greeting){
    printf("%s\n", $greeting);
}, ["Hello World"]));

$pool->shutdown();
?>

. , , Pool, :

<?php
class Background extends Threaded {

    public function __construct(callable $call, array $args = []) {
        $this->call = $call;
        $this->args = $args;
    }

    public function run() {
        $this->synchronized(function(){
            $this->result = call_user_func_array
                ($this->call, $this->args);
            $this->notify();
        });
    }

    public function getResult() {
        return $this->synchronized(function(){
            while (!isset($this->result))
                $this->wait();
            return $this->result;
        });
    }

    protected $call;
    protected $args;
    protected $result;
}

$pool = new Pool(4);

$call = new Background(function($greeting){
    return sprintf("%s\n", $greeting);
}, ["Hello World"]);

$pool->submit($call);

echo $call->getResult();

$pool->shutdown();
?>

, Background::getResult , , , .

+5

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PHP, , exec cURL, script.

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+2

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