PHP Manual: Retrieve list of registered socket transports

array stream_get_transports()

Returns an indexed array containing the name of all socket transports available on the running system.

This function has no parameters.

Returns an indexed array of socket transports names.

Example #1 Using stream_get_transports

<?php
$xportlist = stream_get_transports();
print_r($xportlist);
?>

The above example will output something similar to:

Array (
  [0] => tcp
  [1] => udp
  [2] => unix
  [3] => udg
)

stream_get_transports