TaskSet::spawn

(PHP 8.6+, True Async 1.0)

public TaskSet::spawn(callable $task, mixed ...$args): void

Adds a callable to the set with an auto-increment key (0, 1, 2, …).

If no concurrency limit is set or a slot is available, the coroutine is created immediately. Otherwise, the callable with arguments is placed in a queue and started when a slot becomes available.

Parameters

task: Callable to execute. Accepts any callable: Closure, function, method.
args: Arguments passed to the callable.

Errors

Throws Async\AsyncException if the set is sealed (seal()) or cancelled (cancel()).

Examples

Example #1 Basic usage

<?php

use Async\TaskSet;

spawn(function() {
    $set = new TaskSet();

    $set->spawn(fn() => "first");
    $set->spawn(fn() => "second");

    $set->seal();
    $results = $set->joinAll()->await();

    var_dump($results[0]); // string(5) "first"
    var_dump($results[1]); // string(6) "second"
});

Example #2 With arguments

<?php

use Async\TaskSet;

spawn(function() {
    $set = new TaskSet();

    $set->spawn(function(int $a, int $b) {
        return $a + $b;
    }, 10, 20);

    $set->seal();
    $results = $set->joinAll()->await();
    var_dump($results[0]); // int(30)
});

Documentation