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4.x is outdated, please check the latest version 22.x
Latest version:
pecl install openswoole-22.1.2
<?php Swoole\Coroutine\Http2\Client->ping(): bool
None
Returns true when the ping is successful and false when the ping fails.
The ping frame is a mechanism for measuring the minimum round-trip time from the sender and determining whether an idle connection is still valid or not.
For more information on the implementation of ping frames, see the HTTP/2 Ping Frame RFC document.
