Undefined property: Swoole\ Server\ Port::$connections

the following error occurred when using connections:

foreach($serv->ports[0]->connections as $fd) {
    $serv->push($fd, json_encode($data));
}

Undefined property: SwooleServerPort::$connections,

the official document says that the pcre library is missing. The same error still occurs when
installs pcre-devel, and recompiles swoole.
ask for an answer.

Mar.11,2021
The

port iterator has been added in the new version. Please check if your swoole version supports this feature.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b313a9-2b5c5.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b313a9-2b5c5.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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