socket_create
(PHP 4 >= 4.0.7, PHP 5)
socket_create — Create a socket (endpoint for communication)
Descrierea
resource socket_create
( int $domain
, int $type
, int $protocol
)
Creates and returns a socket resource, also referred to as an endpoint of communication. A typical network connection is made up of 2 sockets, one performing the role of the client, and another performing the role of the server.
Parametri
- domain
-
The domain parameter specifies the protocol family to be used by the socket.
Available address/protocol families Domain Description AF_INET IPv4 Internet based protocols. TCP and UDP are common protocols of this protocol family. AF_INET6 IPv6 Internet based protocols. TCP and UDP are common protocols of this protocol family. Support added in PHP 5.0.0. AF_UNIX Local communication protocol family. High efficiency and low overhead make it a great form of IPC (Interprocess Communication). - type
-
The type parameter selects the type of communication to be used by the socket.
Available socket types Type Description SOCK_STREAM Provides sequenced, reliable, full-duplex, connection-based byte streams. An out-of-band data transmission mechanism may be supported. The TCP protocol is based on this socket type. SOCK_DGRAM Supports datagrams (connectionless, unreliable messages of a fixed maximum length). The UDP protocol is based on this socket type. SOCK_SEQPACKET Provides a sequenced, reliable, two-way connection-based data transmission path for datagrams of fixed maximum length; a consumer is required to read an entire packet with each read call. SOCK_RAW Provides raw network protocol access. This special type of socket can be used to manually construct any type of protocol. A common use for this socket type is to perform ICMP requests (like ping, traceroute, etc). SOCK_RDM Provides a reliable datagram layer that does not guarantee ordering. This is most likely not implemented on your operating system. - protocol
-
The protocol parameter sets the specific protocol within the specified domain to be used when communicating on the returned socket. The proper value can be retrieved by name by using getprotobyname(). If the desired protocol is TCP, or UDP the corresponding constants SOL_TCP