April 2026
Intermediate
1009 pages
34h 15m
English
Content preview from PHP and MySQL
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28.4 WebSockets
Ajax is quite nice, but not particularly performant; after all, the whole thing is still based on HTTP. With WebSockets or the WebSocket protocol, there is a possible alternative. This is a very high-performance, full-duplex communication protocol that enables data to be exchanged with the server in a very simple way. HTTP is still in play, but only for establishing the connection.
WebSockets have numerous advantages. In addition to better performance, the WebSocket protocol also offers bidirectionality, meaning that the server can continuously send data to the client even when a connection is established. The usual HTTP pull method (the client requests data, and only then does the server send it) naturally looks old in comparison. ...
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