PHP Manual: Collect references to completed tasks

Description

public int Pool::collect(Callable $collector = ?)

Allows the pool to collect references determined to be garbage by the optionally given collector.

Parameters

collector: A Callable collector that returns a boolean on whether the task can be collected or not. Only in rare cases should a custom collector need to be used.

Return Values

The number of remaining tasks in the pool to be collected.

Changelog

Version	Description
PECL pthreads 3.0.0	An integer is now returned, and the `collector` parameter is now optional.

Examples

Example #1 A basic example of Pool::collect

<?php
$pool = new Pool(4);

for ($i = 0; $i < 15; ++$i) {
    $pool->submit(new class extends Threaded {});
}

while ($pool->collect()); // blocks until all tasks have finished executing

$pool->shutdown();