[Zalastax]

I want to use sockets in PHP but I don't know how to start it. Just creating a .php file with the socket script in doesn't seem enough.
Please tell me what are the necessary code to get it running. I would really appreciate a test script that just accept and then disconnect a socket.

I have searched the forums and I found a test script here: fsockopen() - they say it's enabled - doesn't work but it was in an attachment that was invalid.

[grace1004]

I got the following example code from php.net. When testing, it works fine.

PHP Code:

<?php
$fp = fsockopen("yourdomain.com", 80, $errno, $errstr, 30);
if (!$fp) {
    echo "$errstr ($errno)<br />\n";
} else {
    $out = "GET / HTTP/1.1\r\n";
    $out .= "Host: yourdomain.com\r\n";
    $out .= "Connection: Close\r\n\r\n";
    fwrite($fp, $out);
    while (!feof($fp)) {
        echo fgets($fp, 128);
    }
    fclose($fp);
}
?>

[Zalastax]

Thank you for the reply. It did work. But in that example the script is acting client. Is it possible for it to act as server too? What IP and port should be used when acting server? If I would use the first example on this page: http://php.net/manual/en/sockets.examples.php I would need to change the IP to the server IP and the port to an open port, since it is free I know all ports aren't open.
As I have understood usually you have to start the socket server from a command line?

[grace1004]

Do you think it's possible to do server-side socket test without having own server?

[Zalastax]

Well since you can specify a host name to connect to and since they handle DNS I didn't think it was impossible. The request could be handled like when you connect on port 80. Since they say sockets work I thought it was possible.

So is it impossible?

[grace1004]

PHP Code:

<?php
error_reporting(E_ALL);

echo "<h2>TCP/IP Connection</h2>\n";

/* Get the port for the WWW service. */
$service_port = getservbyname('www', 'tcp');

/* Get the IP address for the target host. */
$address = gethostbyname('mydomain.com');

/* Create a TCP/IP socket. */
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false) {
    echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
} else {
    echo "OK.\n";
}

echo "Attempting to connect to '$address' on port '$service_port'...";
$result = socket_connect($socket, $address, $service_port);
if ($result === false) {
    echo "socket_connect() failed.\nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "\n";
} else {
    echo "OK.\n";
}

$in = "HEAD / HTTP/1.1\r\n";
$in .= "Host: mydomain.com\r\n";
$in .= "Connection: Close\r\n\r\n";
$out = '';

echo "Sending HTTP HEAD request...";
socket_write($socket, $in, strlen($in));
echo "OK.\n";

echo "Reading response:\n\n";
while ($out = socket_read($socket, 2048)) {
    echo $out;
}

echo "Closing socket...";
socket_close($socket);
echo "OK.\n\n";
?>

After running example #2 code (http://php.net/manual/en/sockets.examples.php), I got the following response:

TCP/IP Connection
OK. Attempting to connect to '31.170.160.169' on port '80'...OK. Sending HTTP HEAD request...OK.
Reading response: HTTP/1.1 200 OK Date: Thu, 10 May 2012 17:56:23 GMT Server: Apache X-Powered-By:
PHP/5.2.17 Connection: close Content-Type: text/html Closing socket...OK.

Isn't this what you want?

To test example #1 code, you need to have your own server for executing php script on shell mode.

[Zalastax]

No i wanted it to act as a server and wait for incoming connections, but since that is impossible I will see if i can set up my own server instead.