stream_socket_pair

Description

stream_socket_pair() creates a pair of connected, indistinguishable socket streams. This function is commonly used in IPC (Inter-Process Communication).

Parameters

Return Values

Returns an array with the two socket resources on success, or FALSE on failure.

Examples

Example 1. A stream_socket_pair() example This example shows the basic usage of stream_socket_pair() in Inter-Process Comunication. <?php $sockets = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM, STREAM_IPPROTO_IP); $pid     = pcntl_fork(); if ($pid == -1) {      die('could not fork'); } else if ($pid) {      /* parent */     fclose($sockets[0]);     fwrite($sockets[1], "child PID: $pid\n");     echo fgets($sockets[1]);     fclose($sockets[1]); } else {     /* child */     fclose($sockets[1]);     fwrite($sockets[0], "message from child\n");     echo fgets($sockets[0]);     fclose($sockets[0]); } ?> The above example will output something similar to: child PID: 1378 message from child