PHP: Unix Domain: Unix and UDG

[edit] Last updated: Sat, 12 May 2012

Unix Domain: Unix and UDG

unix:// and udg:// (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.

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Matthew Fortune 15-Feb-2007 09:03


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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