Use PHP socket to send and receive data

Question

I'm trying to send and receive data by PHP socket.

Evrything is OK but when I'm trying to send data PHP does not send anything (Wireshark told me that sent data length was 0).

I'm using this code:

<?php
$address = 'example.com';
$port = 1234;

$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$sockconnect = socket_connect($sock, $address, $port);

$c = 0;
do {
    $c++;
    $msg = '<test>Xml data</test>';

    socket_write($sock, $msg, strlen($msg));

    echo socket_read($sock, 1024 * 100, PHP_NORMAL_READ);

} while ($c < 3);

socket_close($sock);

Can anyone help me? Thanks for reading my question.

sanmai · Accepted Answer · 2012-01-23 06:31:47Z

9

How can you know that everything is okay if you don't check for errors even once?

Consider the following example from the manual:

<?php
error_reporting(E_ALL);

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

/* Get the IP address for the target host. */
$address = gethostbyname('www.example.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";
}

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";
}

$in = "HEAD / HTTP/1.1\r\n";
$in .= "Host: www.example.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;
}

socket_close($socket);
?>

edited Jan 23, 2012 at 6:31

answered Jan 23, 2012 at 6:19

sanmai

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4 Comments

ucha Over a year ago

There is no any errors, but remote host does not answer me again. But it works correctly when I'm sending data via SocketTest v3.0

ucha Over a year ago

Yes it works on the other hosts, but I need to send only xml data, because my host does not respond http head requests from any ports except 1980. It does not respond me (even using your example) when I'm sending XML data.

sanmai Over a year ago

Well, that is not a PHP problem here.

ucha Over a year ago

But SocketTest (written on java) working properly when using same OS, same data, same host. I've compared data sent by PHP to data sent by SocketTest (wireshark) and all sent package is same.

user3245415 · Accepted Answer · 2014-03-15 16:45:29Z

3

You are not using the gethostbyname function, so it tries to connect to a nonexistent ip address

<?php
$address= gethostbyname('yourdata.com');

answered Mar 15, 2014 at 16:45

user3245415

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