PHP socket communication (tcp/udp) example analysis, socketudp_PHP tutorial

php socket communication (tcp/udp) example analysis, socketudp

This article describes the php socket communication (tcp/udp) method through examples. Share it with everyone for your reference, the details are as follows:

Attention

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

<&#63;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, '202.85.218.133', 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 );
}
&#63;>

2) client.php

<&#63;php
$sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
$msg = 'hello';
$len = strlen($msg);
socket_sendto($sock, $msg, $len, 0, '202.85.218.133', 11109);
socket_close($sock);
&#63;>

Two: TCP method

1)server.php

<&#63;php
//error_reporting( E_ALL );
set_time_limit( 0 );
ob_implicit_flush();
$socket = socket_create( AF_INET, SOCK_STREAM, SOL_TCP );
socket_bind( $socket, '192.168.2.143', 11109 );
socket_listen($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)
&#63;>

2) client.php

<&#63;php
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$con=socket_connect($socket,'192.168.2.143',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);
&#63;>

Readers who are interested in more PHP-related content can check out the special topics of this site: "Summary of PHP socket usage", "Introduction to PHP basic syntax tutorial", "Summary of PHP error and exception handling methods" and "PHP common functions and techniques" Summary》

I hope this article will be helpful to everyone in PHP programming.

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