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
v3	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();