PHP socket communication (tcp/udp) example analysis

This article mainly introduces the php socket communication (tcp/udp) method, and analyzes the related techniques of realizing tcp and udp communication based on socket in the form of examples. Friends in need can refer to it.

Note

1. When using socket_bind, the IP address cannot be a real loopback address such as 127.0.0.1
2. When server.php is running in the background, nohup php server.php > /var/tmp/a.log 2>&1 &

1: udp method

1) server.php

<?php
//error_reporting( E_ALL );
set_time_limit( 0 );
ob_implicit_flush();
$socket = socket_create( AF_INET, SOCK_DGRAM, SOL_UDP );
if ( $socket === false ) {
  echo "socket_create() failed:reason:" . socket_strerror( socket_last_error() ) . "\n";
}
$ok = socket_bind( $socket, &#39;202.85.218.133&#39;, 11109 );
if ( $ok === false ) {
  echo "socket_bind() failed:reason:" . socket_strerror( socket_last_error( $socket ) );
}
while ( true ) {
  $from = "";
  $port = 0;
  socket_recvfrom( $socket, $buf,1024, 0, $from, $port );
  echo $buf;
  usleep( 1000 );
}
?>

2) client.php

<?php
$sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
$msg = &#39;hello&#39;;
$len = strlen($msg);
socket_sendto($sock, $msg, $len, 0, &#39;202.85.218.133&#39;, 11109);
socket_close($sock);
?>

Two: TCP method

1)server.php

<?php
//error_reporting( E_ALL );
set_time_limit( 0 );
ob_implicit_flush();
$socket = socket_create( AF_INET, SOCK_STREAM, SOL_TCP );
socket_bind( $socket, &#39;192.168.2.143&#39;, 11109 );
socket_listen($socket);
$acpt=socket_accept($socket);
echo "Acpt!\n";
while ( $acpt ) {
  $words=fgets(STDIN);
  socket_write($acpt,$words);
  $hear=socket_read($acpt,1024);
  echo $hear;
  if("bye\r\n"==$hear){
    socket_shutdown($acpt);
    break;
  }
  usleep( 1000 );
}
socket_close($socket)
?>

2) client.php

<?php
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$con=socket_connect($socket,&#39;192.168.2.143&#39;,11109);
if(!$con){socket_close($socket);exit;}
echo "Link\n";
while($con){
    $hear=socket_read($socket,1024);
    echo $hear;
    $words=fgets(STDIN);
    socket_write($socket,$words);
    if($words=="bye\r\n"){break;}
}
socket_shutdown($socket);
socket_close($sock);
?>

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