fsockopen Open Internet or Unix domain socket connection- PHP

resource fsockopen ( string $hostname [, int $port = -1 [, int &$errno [, string &$errstr [, float $timeout = ini_get("default_socket_timeout") ]]]] )

Open Internet or Unix domain socket connection

Initiates a socket connection to the resource specified by hostname.


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

4.3.0 Added support for the timeout parameter on win32. 4.3.0 SSL and TLS over TCP/IP support was added.

Question: Give me working Example of fsockopen?

$fp = fsockopen('example.com', 80);

$postVars = array(
    'key1' => 'value1',
    'key2' => 'value2',
    'key3' => 'value3',
    'key4' => 'value4'
);
$postContent = http_build_query($postVars);

fwrite($fp, "POST /reposter.php HTTP/1.1\r\n");
fwrite($fp, "Host: example.com\r\n");
fwrite($fp, "Content-Type: application/x-www-form-urlencoded\r\n");
fwrite($fp, "Content-Length: ".strlen($postContent)."\r\n");
fwrite($fp, "Connection: close\r\n");
fwrite($fp, "\r\n");

fwrite($fp, $postContent);

header('Content-type: text/plain');
while (!feof($fp)) {
    echo fgets($fp, 1024);
}