- $socket: The socket resource
- $level: The option level, usually SOL_TCP
- $optname: The option name, such as TCP_NODELAY
- $optval: The option value, typically boolean or integer
Example code:
<?php
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false) {
die("socket_create failed: " . socket_strerror(socket_last_error()));
}
// Disable Nagle algorithm to reduce sending delay
if (!socket_set_option($socket, SOL_TCP, TCP_NODELAY, 1)) {
die("socket_set_option TCP_NODELAY failed: " . socket_strerror(socket_last_error($socket)));
}
echo "TCP_NODELAY set successfully, data sending delay has been disabled.\n";
// Other socket connection and operations...
socket_close($socket);
?>