Pool::isClosed

Check if the pool is closed.

Pool::isClosed ​

(PHP 8.6+, True Async 1.0)

php
public Pool::isClosed(): bool

Checks whether the pool has been closed by a close() call.

Parameters ​

This method takes no parameters.

Return Value ​

Returns true if the pool is closed, false if the pool is active.

Examples ​

Example #1 Checking pool state ​

php
<?php

use Async\Pool;

$pool = new Pool(
    factory: fn() => new \stdClass(),
    max: 5
);

var_dump($pool->isClosed()); // bool(false)

$pool->close();

var_dump($pool->isClosed()); // bool(true)

Example #2 Conditional pool usage ​

php
<?php

use Async\Pool;

function executeQuery(Pool $pool, string $sql): mixed
{
    if ($pool->isClosed()) {
        throw new \RuntimeException('Connection pool is closed');
    }

    $conn = $pool->acquire();

    try {
        return $conn->query($sql)->fetchAll();
    } finally {
        $pool->release($conn);
    }
}

See Also ​