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25.x is outdated, please check the latest version 26.x
Latest version:
pecl install openswoole-26.2.0
<?php OpenSwoole\Coroutine::exists(int $cid): bool
coroutine ID.
if success, it returns TRUE, otherwise it returns FALSE.
Check if a coroutine is exists by coroutine ID.
<?php
co::run(function () {
echo OpenSwoole\Coroutine::exists(OpenSwoole\Coroutine::getCid());
});