Sockets
PHP Manual

socket_create_pair

(PHP 4 >= 4.0.7, PHP 5)

socket_create_pair — Creates a pair of indistinguishable sockets and stores them in an array

Descripción

bool socket_create_pair ( int $domain , int $type , int $protocol , array &$fd )

socket_create_pair() creates two connected and indistinguishable sockets, and stores them in fd . This function is commonly used in IPC (InterProcess Communication).

Lista de parámetros

domain

The domain parameter specifies the protocol family to be used by the socket. See socket_create() for the full list.

type

The type parameter selects the type of communication to be used by the socket. See socket_create() for the full list.

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, and SOL_UDP can also be used.

See socket_create() for the full list of supported protocols.

fd

Reference to an array in which the two socket resources will be inserted.

Valores retornados

Devuelve TRUE si todo se llevó a cabo correctamente, FALSE en caso de fallo.

Ejemplos

Example#1 socket_create_pair() example

<?php
$sockets 
= array();
/* Setup socket pair */
if (socket_create_pair(AF_UNIXSOCK_STREAM0$sockets) === false) {
    echo 
"socket_create_pair failed. Reason: ".socket_strerror(socket_last_error());
}
/* Send and Recieve Data */
if (socket_write($sockets[0], "ABCdef123\n"strlen("ABCdef123\n")) === false) {
    echo 
"socket_write() failed. Reason: ".socket_strerror(socket_last_error($sockets[0]));
}
if ((
$data socket_read($sockets[1], strlen("ABCdef123\n"), PHP_BINARY_READ) === false) {
    echo 
"socket_read() failed. Reason: ".socket_strerror(socket_last_error($sockets[1]));
}
var_dump($data);

/* Close sockets */
socket_close($sockets[0]);
socket_close($sockets[1]);
?>

Example#2 socket_create_pair() IPC example

<?php
$ary 
= array();
$strone 'Message From Parent.';
$strtwo 'Message From Child.';
if (
socket_create_pair(AF_UNIXSOCK_STREAM0$ary) === false) {
    echo 
"socket_create_pair() failed. Reason: ".socket_strerror(socket_last_error());
}
$pid pcntl_fork();
if (
$pid == -1) {
    echo 
'Could not fork Process.';
} elseif (
$pid) {
    
/*parent*/
    
socket_close($ary[0]);
    if (
socket_write($ary[1], $stronestrlen($strone)) === false) {
        echo 
"socket_write() failed. Reason: ".socket_strerror(socket_last_error($ary[1]));
    }
    if (
socket_read($ary[1], strlen($strtwo), PHP_BINARY_READ) == $strtwo) {
        echo 
"Recieved $strtwo\n";
    }
    
socket_close($ary[1]);
} else {
    
/*child*/
    
socket_close($ary[1]);
    if (
socket_write($ary[0], $strtwostrlen($strtwo)) === false) {
        echo 
"socket_write() failed. Reason: ".socket_strerror(socket_last_error($ary[0]));
    }
    if (
socket_read($ary[0], strlen($strone), PHP_BINARY_READ) == $strone) {
        echo 
"Recieved $strone\n";
    }
    
socket_close($ary[0]);
}
?>

Ver también


Sockets
PHP Manual