Join 4,000+ others and never miss out on new tips, tutorials, and more.
Latest version:
pecl install openswoole-22.1.2 | composer require openswoole/core:22.1.5
<?php OpenSwoole\WebSocket\Server->exist(int $fd): bool
The file descriptor of the WebSocket connection, it can be found from the frame object.
If success, it returns true, otherwise it returns false
Check if the TCP connection is established, exists and is in an active state. This is a good way to check if the client is present. A connection only exists if it has completed the WebSocket handshake stage, if the connection is in the process of performing the handshake, this method will return false.
Note: This method is only used to check if a TCP connection exists, you should use isEstablished() to check specifically for a WebSocket connection type.
<?php
$server->on('Message', function OpenSwoole\WebSocket\Server $server, $frame)
{
if($server->exists($frame->fd))
{
echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}\n";
$server->push($frame->fd, "This is a message from the server.");
}
else
{
echo "Connection does not exist\n";
}
});