Unix Domain: Unix and UDG

unix:// since PHP 3, udg:// since PHP 5

unix:///tmp/mysock
udg:///tmp/mysock

unix:// provides access to a socket stream connection in the Unix domain. udg:// provides an alternate transport to a Unix domain socket using the user datagram protocol.

Unix domain sockets, unlike Internet domain sockets, do not expect a port number. In the case of fsockopen() the portno parameter should be set to 0.

Code Examples / Notes » transports.unix

matthew fortune

It appears that fsockopen prior to php5 did not need the unix:// qualifier when opening a unix domain socket: php4: fsockopen("/tmp/mysocket"......); php5: fsockopen("unix:///tmp/mysocket"......); This caught me out when upgrading.

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Internet Domain: TCP
Unix Domain: Unix and UDG