How to make a long connection with swoole

SWOOLE_KEEP Establishing a TCP persistent connection

swoole_client supports creating a TCP persistent connection in php-fpm/apache Service-Terminal. (Recommended learning: swoole video tutorial)

Usage:

$client = new swoole_client(SWOOLE_SOCK_TCP | SWOOLE_KEEP);
$client->connect('127.0.0.1', 9501);

After enabling the SWOOLE_KEEP option, a request ends The socket will not be closed, and the last connection created will be automatically reused the next time you connect.

If you execute connect and find that the connection has been closed by the server, then connect will create a new connection.

Advantages of SWOOLE_KEEP

TCP long connection can reduce the extra IO consumption caused by connect 3 handshakes/close 4 wave waves

Reduce server side close/connect times

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