通过 php 脚本连接到 TCP/IP 服务器
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Connecting to a TCP/IP server via php script
提问by John Smith
I need to implement a php script on my website that would do the following:
我需要在我的网站上实现一个 php 脚本来执行以下操作：
- Connect to a remote server
- Send packet to the server
- Receive packet from the server
- 连接到远程服务器
- 向服务器发送数据包
- 从服务器接收数据包
Everything is already configurated on the server side to respond to packet requests, I only need to figure out how to use php to connect to TCP/IP server.
服务器端已经配置好了响应数据包请求，我只需要弄清楚如何使用php连接到TCP/IP服务器。
Any ideas in which direction to look?
任何想法朝哪个方向看？
回答by TheHorse
Easily with php sockets:
轻松使用 php 套接字：
<?php
$fp = fsockopen("www.example.com", 80, $errno, $errstr, 30);
if (!$fp) {
echo "$errstr ($errno)<br />\n";
} else {
fwrite($fp, "Your message");
while (!feof($fp)) {
echo fgets($fp, 128);
}
fclose($fp);
}
?>
To read more, go to http://php.net/manual/en/function.fsockopen.php
回答by Arun Killu
<?php
error_reporting(E_ALL);
/* Allow the script to hang around waiting for connections. */
set_time_limit(0);
/* Turn on implicit output flushing so we see what we're getting
* as it comes in. */
ob_implicit_flush();
$address = '192.168.1.53';
$port = 10000;
if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
}
if (socket_bind($sock, $address, $port) === false) {
echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}
if (socket_listen($sock, 5) === false) {
echo "socket_listen() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}
do {
if (($msgsock = socket_accept($sock)) === false) {
echo "socket_accept() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
break;
}
/* Send instructions. */
$msg = "\nWelcome to the PHP Test Server. \n" .
"To quit, type 'quit'. To shut down the server type 'shutdown'.\n";
socket_write($msgsock, $msg, strlen($msg));
do {
if (false === ($buf = socket_read($msgsock, 2048, PHP_NORMAL_READ))) {
echo "socket_read() failed: reason: " . socket_strerror(socket_last_error($msgsock)) . "\n";
break 2;
}
if (!$buf = trim($buf)) {
continue;
}
if ($buf == 'quit') {
break;
}
if ($buf == 'shutdown') {
socket_close($msgsock);
break 2;
}
$talkback = "PHP: You said '$buf'.\n";
socket_write($msgsock, $talkback, strlen($talkback));
echo "$buf\n";
} while (true);
socket_close($msgsock);
} while (true);
socket_close($sock);
?>
this is just an example from net for further look documentation
connecting to tcp server
连接到 tcp 服务器
$host="192.168.1.99";
$port = 1234; // open a client connection
$fp = fsockopen ($host, $port, $errno, $errstr);
if (!$fp) {
$result = "Error: could not open socket connection";
}
else { // get the welcome message fgets ($fp, 1024); // write the user string to the socket
fputs($fp, $message); // get the result $result .= fgets ($fp, 1024); // close the connection
fputs ($fp, "END");
fclose ($fp); // trim the result and remove the starting ?
$result = trim($result);
$result = substr($result, 2); // now print it to the browser
} ?>
Server said: <? echo $result; ?>
