fsockopen

    (PHP 4, PHP 5, PHP 7, PHP 8)

    fsockopen — Open Internet or Unix domain socket connection

    Description

    fsockopen(
        string $hostname,
        int $port = -1,
        int &$error_code = null,
        string &$error_message = null,
        ?float $timeout = null
    ): resource|false

    Initiates a socket connection to the resource specified by hostname.

    PHP supports targets in the Internet and Unix domains as described in List of Supported Socket Transports. A list of supported transports can also be retrieved using stream_get_transports().

    The socket will by default be opened in blocking mode. You can switch it to non-blocking mode by using stream_set_blocking().

    The function stream_socket_client() is similar but provides a richer set of options, including non-blocking connection and the ability to provide a stream context.

    Parameters

    hostname

    If OpenSSL support is installed, you may prefix the hostname with either ssl:// or tls:// to use an SSL or TLS client connection over TCP/IP to connect to the remote host.

    port

    The port number. This can be omitted and skipped with -1 for transports that do not use ports, such as unix://.

    error_code

    If provided, holds the system level error number that occurred in the system-level connect() call.

    If the value returned in error_code is 0 and the function returned false, it is an indication that the error occurred before the connect() call. This is most likely due to a problem initializing the socket.

    error_message

    The error message as a string.

    timeout

    The connection timeout, in seconds. When null, the default_socket_timeout php.ini setting is used.

    Note:

    If you need to set a timeout for reading/writing data over the socket, use stream_set_timeout(), as the timeout parameter to fsockopen() only applies while connecting the socket.

    Return Values

    fsockopen() returns a file pointer which may be used together with the other file functions (such as fgets(), fgetss(), fwrite(), fclose(), and feof()). If the call fails, it will return false

    Errors/Exceptions

    Throws E_WARNING if hostname is not a valid domain.

    Changelog

    Version Description
    8.0.0 timeout is nullable now.

    Examples

    Example #1 fsockopen() Example

    <?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);
    }
    ?>

    Example #2 Using UDP connection

    The example below shows how to retrieve the day and time from the UDP service "daytime" (port 13) in your own machine.

    <?php
    $fp     = fsockopen("udp://127.0.0.1", 13, $errno, $errstr);
    if (!    $fp) {
    echo     "ERROR: $errno - $errstr<br />\n";
    } else {
    fwrite($fp, "\n");
    echo     fread($fp, 26);
    fclose($fp);
    }
    ?>

    Notes

    Note:

    Depending on the environment, the Unix domain or the optional connect timeout may not be available.

    Warning

    UDP sockets will sometimes appear to have opened without an error, even if the remote host is unreachable. The error will only become apparent when you read or write data to/from the socket. The reason for this is because UDP is a "connectionless" protocol, which means that the operating system does not try to establish a link for the socket until it actually needs to send or receive data.

    Note: When specifying a numerical IPv6 address (e.g. fe80::1), you must enclose the IP in square brackets—for example, tcp://[fe80::1]:80.

    See Also

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    ＋add a note

    User Contributed Notes 42 notes

    up
    23
    joe at edwardsconsultants dot com
    21 years ago
    just a quick note for users attempting https and thinking they must resort to curl or alternate methods -
    you can use fsockopen, just read the docs closely. basically they are saying to use 'ssl://' for a HTTPS (SSL) web request.

    so this would work for authorize.net, and others; even for that paypal IPN - however I think it would be best to leave the site and deal with paypal's form:

    <?php
    $host     = "something.example.com";
    $port = 443;
    $path = "/the/url/path/file.php"; //or .dll, etc. for authnet, etc.

    //you will need to setup an array of fields to post with
    //then create the post string
    $formdata = array ( "x_field" => "somevalue");
    //build the post string
    foreach($formdata AS $key => $val){
    $poststring .= urlencode($key) . "=" . urlencode($val) . "&";
    }
    // strip off trailing ampersand
    $poststring = substr($poststring, 0, -1);

    $fp = fsockopen("ssl://".$host, $port, $errno, $errstr, $timeout = 30);

    if(!    $fp){
    //error tell us
    echo "$errstr ($errno)\n";

    }else{

    //send the server request
    fputs($fp, "POST $path HTTP/1.1\r\n");
    fputs($fp, "Host: $host\r\n");
    fputs($fp, "Content-type: application/x-www-form-urlencoded\r\n");
    fputs($fp, "Content-length: ".strlen($poststring)."\r\n");
    fputs($fp, "Connection: close\r\n\r\n");
    fputs($fp, $poststring . "\r\n\r\n");

    //loop through the response from the server
    while(!feof($fp)) {
    echo     fgets($fp, 4096);
    }
    //close fp - we are done with it
    fclose($fp);
    }
    ?>
    up
    16
    sir_reality2001 at yahoo dot com
    20 years ago
    <?php
    // This script is an example of posting multiple files using
    // fsockopen.
    // The tricky part is making sure the HTTP headers and file boundaries are acceptable to the target webserver.
    // This script is for example purposes only and could/should be improved upon.

    $host='targethost';
    $port=80;
    $path='/test/socket/file_upload/receive_files.php';

    // the file you want to upload
    $file_array[0] = "dingoboy.gif"; // the file
    $file_array[1] = "dingoboy2.gif"; // the file
    $file_array[2] = "dingoboy3.gif"; // the file
    $content_type = "image/gif"; // the file mime type
    //$content_type = "text/plain";
    //echo "file_array[0]:$file_array[0]<br><br>";

    srand((double)microtime()*1000000);
    $boundary = "---------------------------".substr(md5(rand(0,32000)),0,10);

    $data = "--$boundary";

    for(    $i=0;$i<count($file_array);$i++){
    $content_file = join("", file($file_array[$i]));

    $data.="
    Content-Disposition: form-data; name=\"file"    .($i+1)."\"; filename=\"$file_array[$i]\"
    Content-Type:     $content_type

    $content_file
    --    $boundary";

    }

    $data.="--\r\n\r\n";

    $msg =
    "POST $path HTTP/1.0
    Content-Type: multipart/form-data; boundary=    $boundary
    Content-Length: "    .strlen($data)."\r\n\r\n";

    $result="";

    // open the connection
    $f = fsockopen($host, $port);

    fputs($f,$msg.$data);

    // get the response
    while (!feof($f)) $result .= fread($f,32000);

    fclose($f);

    ?>
    up
    12
    ryan1_00 at hotmail dot com
    17 years ago
    This script checks specific ports so you need to have the correct port open on the server for this to work.

    E.g if i have a windows domain controller and it is servering LDAP then the following would be used to check it is online:
    <?php
    chkServer    ("MyDC", "389");
    ?>

    for a webserver:
    <?php
    chkServer    ("MyWebSvr", "80");
    ?>

    etc etc
    --------------------------------------------------------

    <?php
    // check if a server is up by connecting to a port
    function chkServer($host, $port)
    {
    $hostip = @gethostbyname($host); // resloves IP from Hostname returns hostname on failure

    if ($hostip == $host) // if the IP is not resloved
    {
    echo     "Server is down or does not exist";
    }
    else
    {
    if (!    $x = @fsockopen($hostip, $port, $errno, $errstr, 5)) // attempt to connect
    {
    echo     "Server is down";
    }
    else
    {
    echo     "Server is up";
    if (    $x)
    {
    @    fclose($x); //close connection
    }
    }
    }
    }
    ?>
    up
    4
    michiel at parse dot nl
    20 years ago
    The following snippet allows you to retrieve the title of a page.

    Great for rewriting auto-url detectors to display the actual title rather then http://...

    <?php
    echo get_url_title("http://www.php.net/cal.php?id=409");

    function     get_url_title($url, $timeout = 2)
    {
    $url = parse_url($url);

    if(!    in_array($url['scheme'],array('','http')))
    return;

    $fp = fsockopen ($url['host'], ($url['port'] > 0 ? $url['port'] : 80), $errno, $errstr, $timeout);
    if (!    $fp)
    {
    return;
    // echo "$errstr ($errno)<br>\n";
    }
    else
    {
    fputs ($fp, "GET /".$url['path'].($url['query'] ? '?'.$url['query'] : '')." HTTP/1.0\r\nHost: ".$url['host']."\r\n\r\n");
    $d = '';
    while (!    feof($fp))
    {
    $d .= fgets ($fp,2048);

    if(    preg_match('~(</head>|<body>|(<title>\s*(.*?)\s*</title>))~i', $d, $m))
    break;
    }
    fclose ($fp);

    return     $m[3];
    }
    }
    ?>
    up
    2
    huli0401 at gmail dot com
    16 years ago
    <?php
    // Check for new version
    $current_version = explode('.', '1.0.00');
    $minor_revision = (int) $current_version[2];

    $errno = 0;
    $errstr = $version_info = '';

    if (    $fsock = fsockopen("www.exanmple.eu", 80, $errno, $errstr, 30))
    {
    @    fputs($fsock, "GET /ver.txt HTTP/1.1\r\n");
    @    fputs($fsock, "HOST: www.example.eu\r\n");
    @    fputs($fsock, "Connection: close\r\n\r\n");

    $get_info = false;
    while (!@    feof($fsock))
    {
    if (    $get_info)
    {
    $version_info .= @fread($fsock, 1024);
    }
    else
    {
    if (@    fgets($fsock, 1024) == "\r\n")
    {
    $get_info = true;
    }
    }
    }
    @    fclose($fsock);

    $version_info = explode("\n", $version_info);
    $latest_head_revision = (int) $version_info[0];
    $latest_minor_revision = (int) $version_info[2];
    $latest_version = (int) $version_info[0] . '.' . (int) $version_info[1] . '.' . (int) $version_info[2];

    if (    $latest_head_revision == 2 && $minor_revision == $latest_minor_revision)
    {
    $version_info = '<p style="color:green">OK</p>';
    }
    else
    {
    $version_info = '<p style="color:red">neaktualne';
    $version_info .= '<br />'Latest_version_info' . $latest_version) . ' ' . sprintf(Current_version_info'. '1.0.00') . '</p>';
    }
    }
    else
    {
    if (    $errstr)
    {
    $version_info = '<p style="color:red">' . sprintf(Connect_socket_error) . '</p>';
    }
    else
    {
    $version_info = '<p>'Socket_functions_disabled'</p>';
    }
    }

    $version_info .= '<p>'Mailing_list_subscribe_reminder'</p>';

    echo     $version_info;
    ?>
    up
    4
    verran at descent-rangers dot com
    22 years ago
    I was tearing my hair out for a week trying to figure out how to do this.

    If you use fsockopen with a service that doesn't have an EOF, or you try to read beyond EOF or line break, PHP can hang completely.

    In my case, I was trying to write a class that talks to Kali servers (www.kali.net) to get a list of people on the chat server. To keep PHP from hanging due to the above, I discovered this:

    <?php
    class kali_utils {
    function     games_list($kali_server_ip, $kali_server_port) {
    $result = array();
    $fp = fsockopen($kali_server_ip, $kali_server_port, $errno, $error, 30);
    if (!    $fp) {
    $result["errno"] = $errno;
    $result["error"] = $error;
    }
    else {
    fputs($fp, "KALIQ");
    $header = fread($fp, 5);
    $bytes_left = socket_get_status($fp);
    if (    $bytes_left > 0) {
    $result["results"] = fread($fp, $bytes_left["unread_bytes"]);
    }
    else {
    $result["results"] = "";
    }
    fclose($fp);
    }
    return     $result;
    }
    }
    ?>

    When I send the request packet, I get a response packet of length 5. Then I call socket_get_status() and use the unread_bytes key from it to know how far to fread from the socket. Works very good.

    I've only used this on PHP 4.2.1 so far.
    up
    5
    ghzero at ghzero dot de
    15 years ago
    note:
    the default protocol - if not given - seems to be tcp://
    up
    4
    richard dot lajaunie at cote-azur dot cci dot fr
    19 years ago
    <?php
    /************************************************************
    * Author: Richard Lajaunie
    * Mail : richard.lajaunie@cote-azur.cci.fr
    *
    * subject : this script retreive all mac-addresses on all ports
    * of a Cisco 3548 Switch by a telnet connection
    *
    * base on the script by: xbensemhoun at t-systems dot fr
    **************************************************************/

    if ( array_key_exists(1, $argv) ){
    $cfgServer = $argv[1];
    }else{
    echo     "ex: 'php test.php 10.0.0.0' \n";
    exit;
    }

    $cfgPort = 23; //port, 22 if SSH
    $cfgTimeOut = 10;

    $usenet = fsockopen($cfgServer, $cfgPort, $errno, $errstr), $cfgTimeOut);

    if(!    $usenet){
    echo     "Connexion failed\n";
    exit();
    }else{
    echo     "Connected\n";
    fputs ($usenet, "password\r\n");
    fputs ($usenet, "en\r\n");
    fputs ($usenet, "password\r\n");
    fputs ($usenet, "sh mac-address-table\r\n");
    fputs ($usenet, " "); // this space bar is this for long output

    // this skip non essential text
    $j = 0;
    while (    $j<16){
    fgets($usenet, 128);
    $j++;
    }
    stream_set_timeout($usenet, 2); // set the timeout for the fgets
    $j = 0;
    while (!    feof($usenet)){
    $ret = fgets($usenet, 128);
    $ret = str_replace("\r", '', $ret);
    $ret = str_replace("\n", "", $ret);
    if (    ereg("FastEthernet", $ret)){
    echo     "$ret \n";
    }
    if (    ereg('--More--', $ret) ){
    fputs ($usenet, " "); // for following page
    }
    $info = stream_get_meta_data($usenet);
    if (    $info['timed_out']) {
    $j++;
    }
    if (    $j >2){
    fputs ($usenet, "lo");
    break;
    }
    }
    }
    echo     "End.\r\n";
    ?>
    up
    5
    Kiki_EF
    19 years ago
    Additional ICQ status request over proxy
    <?php
    function icq_uin($uin)
    {
    if (!     is_numeric($uin))
    return     false;
    $proxy_name = 'proxy.mydomain.de';
    $proxy_port = 8080;
    $proxy_user = "";
    $proxy_pass = "";
    $proxy_cont = '';
    $request_url = "http://status.icq.com/online.gif?icq=$uin";

    $proxy_fp = fsockopen($proxy_name, $proxy_port);
    if (!    $proxy_fp)
    return     false;
    fputs($proxy_fp, "GET $request_url HTTP/1.0\r\nHost: $proxy_name\r\n");
    fputs($proxy_fp, "Proxy-Authorization: Basic ". base64_encode ("$proxy_user:$proxy_pass")."\r\n\r\n");
    while(!    feof($proxy_fp)){
    $proxy_cont .= fread($proxy_fp,4096);
    }
    fclose($proxy_fp);
    $proxy_cont = substr($proxy_cont, strpos($proxy_cont,"\r\n\r\n")+4);
    if (    strstr($proxy_cont, 'online1'))
    return     'online';
    if (    strstr($proxy_cont, 'online0'))
    return     'offline';
    if (    strstr($proxy_cont, 'online2'))
    return     'disabled';
    }
    echo     "User is ".icq_uin(123456789012345);
    ?>

    Thanx

    [EDIT BY danbrown AT php DOT net: Based on code provided in a note by (rafaelbc AT matrix DOT com DOT br) on 23-MAY-09, which has since been removed.]
    up
    6
    robin at pozytron dot com
    19 years ago
    I have found, when using fsockopen() and the POST method, that using HTTP/1.1 is VERY significantly slower than HTTP/1.0 (at least for the server I'm querying, an Orion-based server). Also, using cURL tended to be faster than fsockopen(), though only slightly. For example, here was a recent set of data (for the same exact request in each case):

    cURL: 4.2sec
    fsockopen() HTTP/1.0: 4.9sec
    fsockopen() HTTP/1.1: 19.9sec (!)

    I'm not sure why this was occurring. Perhaps it has something to do with the Orion server, which I have little experience with. However, it was not a fluke, and I double-checked the code to make sure there were no errors.

    EDITORS NOTE: HTTP/1.1 uses persistent connection causing this delay. Use "Connection: close" header to disable it.
    up
    3
    edwin at bitstorm dot org
    19 years ago
    Here's a function to just fetch the contents behind an URL.

    <?php
    function fetchURL( $url ) {
    $url_parsed = parse_url($url);
    $host = $url_parsed["host"];
    $port = $url_parsed["port"];
    if (    $port==0)
    $port = 80;
    $path = $url_parsed["path"];
    if (    $url_parsed["query"] != "")
    $path .= "?".$url_parsed["query"];

    $out = "GET $path HTTP/1.0\r\nHost: $host\r\n\r\n";

    $fp = fsockopen($host, $port, $errno, $errstr, 30);

    fwrite($fp, $out);
    $body = false;
    while (!    feof($fp)) {
    $s = fgets($fp, 1024);
    if (     $body )
    $in .= $s;
    if (     $s == "\r\n" )
    $body = true;
    }

    fclose($fp);

    return     $in;
    }
    ?>
    up
    5
    brage (a t) jeffnappi (d.o.t) commie
    21 years ago
    thought you guys may appreciate this function, allows you to pass an array of urls to download and does so simultaneously using non-blocking sockets, then returns the data in an array.

    <?php
    // function connects to an array of URLS at the same time
    // and returns an array of results.

    function multiHTTP ($urlArr) {
    $sockets = Array(); // socket array!
    $urlInfo = Array(); // info arr
    $retDone = Array();
    $retData = Array();
    $errno = Array();
    $errstr = Array();
    for (    $x=0;$x<count($urlArr);$x++) {
    $urlInfo[$x] = parse_url($urlArr[$x]);
    $urlInfo[$x][port] = ($urlInfo[$x][port]) ? $urlInfo[$x][port] : 80;
    $urlInfo[$x][path] = ($urlInfo[$x][path]) ? $urlInfo[$x][path] : "/";
    $sockets[$x] = fsockopen($urlInfo[$x][host], $urlInfo[$x][port],
    $errno[$x], $errstr[$x], 30);
    socket_set_blocking($sockets[$x],FALSE);
    $query = ($urlInfo[$x][query]) ? "?" . $urlInfo[$x][query] : "";
    fputs($sockets[$x],"GET " . $urlInfo[$x][path] . "$query HTTP/1.0\r\nHost: " .
    $urlInfo[$x][host] . "\r\n\r\n");
    }
    // ok read the data from each one
    $done = false;
    while (!    $done) {
    for (    $x=0; $x < count($urlArr);$x++) {
    if (!    feof($sockets[$x])) {
    if (    $retData[$x]) {
    $retData[$x] .= fgets($sockets[$x],128);
    } else {
    $retData[$x] = fgets($sockets[$x],128);
    }
    } else {
    $retDone[$x] = 1;
    }
    }
    $done = (array_sum($retDone) == count($urlArr));
    }
    return     $retData;
    }
    ?>
    up
    6
    Alexander Wegener
    17 years ago
    To check if a Url is Online (with http and https)
    Using @fgets to hide Warning when using SSL
    (Bug: "Warning: function.fgets SSL: fatal protocol error", http://bugs.php.net/bug.php?id=23220)

    <?php

    function isOnline($url) {
    if (!    $url_info = parse_url($url)) {
    return     false;
    }

    switch (    $url_info['scheme']) {
    case     'https':
    $scheme = 'ssl://';
    $port = 443;
    break;
    case     'http':
    default:
    $scheme = '';
    $port = 80;
    }

    $data = "";
    $fid = @fsockopen($scheme . $url_info['host'], $port, $errno, $errstr, 30);
    if (    $fid) {
    fputs($fid, 'HEAD ' . (isset($url_info['path'])? $url_info['path']: '/') . (isset($url_info['query'])? '?' . $url_info['query']: '') . " HTTP/1.0\r\n" .
    "Connection: close\r\n" .
    'Host: ' . $url_info['host'] . "\r\n\r\n");
    while (!    feof($fid)) {
    $data .= @fgets($fid, 128);
    }
    fclose($fid);
    return !empty(    $data);
    } else {
    return     false;
    }
    }

    ?>
    up
    1
    GreenReaper
    5 years ago
    PHP (or OpenSSL) may not always choose to use e.g. TLS 1.2, but you can force it to with tlsv1.2://
    https://docs.php.net/manual/en/migration56.openssl.php#migration56.openssl.crypto-method

    This was a great help to me, given Twitter's recent API changes to require TLS 1.2+.
    up
    6
    nytro_rst at yahoo dot com
    14 years ago
    A simple proxy list checker. You can check a list ip:port if that port is opened on that IP.

    <?php

    $fisier     = file_get_contents('proxy_list.txt'); // Read the file with the proxy list
    $linii = explode("\n", $fisier); // Get each proxy
    $fisier = fopen("bune.txt", "a"); // Here we will write the good ones

    for($i = 0; $i < count($linii) - 1; $i++) test($linii[$i]); // Test each proxy

    function test($proxy)
    {
    global     $fisier;
    $splited = explode(':',$proxy); // Separate IP and port
    if($con = @fsockopen($splited[0], $splited[1], $eroare, $eroare_str, 3))
    {
    fwrite($fisier, $proxy . "\n"); // Check if we can connect to that IP and port
    print $proxy . '<br>'; // Show the proxy
    fclose($con); // Close the socket handle
    }
    }

    fclose($fisier); // Close the file

    ?>
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    3
    saul dot dobney at dobney dot com
    19 years ago
    If you are using fsockopen to access webpage, but come across a redirect (Location: ) in the header and want to find and follow the redirect as in this snippet:

    <?php
    while (!feof($fp)) {
    $line=fgets($fp, 1024);
    if (    stristr($line,"location:")!="") {
    $redirect=preg_replace("/location:/i","",$line);
    }
    }
    ?>

    Then don't forget to <?php $redirect = trim($redirect); ?> before trying to follow this new link as $redirect actually has a \r\n on the end of it and won't give you a valid path in the next iteration otherwise. A six hour bug.

    Saul Dobney
    up
    1
    bradland at umich dot edu
    17 years ago
    I was having trouble doing an https in fopen and with fsockopen where the address had ssl://. I was getting error code 114 in the log. After much research i found that there was some ssl conflict trouble with MySQL 5.0.20-5.0.33. It had some functions that were interfering with openssl that showed up in the php install.

    http://bugs.mysql.com/bug.php?id=21930
    http://bugs.mysql.com/bug.php?id=19289
    up
    1
    v13+phpnet at it dot teithe dot gr
    17 years ago
    The following function performs pop3 authentication. Returns NULL on error, or true/false to indicate username/password matching:

    $address is the hostname of the server and $ssl is a boolean that indicates whether an SSL connection is requested.

    <?php
    function pop3authCheck($username, $password, $address, $ssl)
    {
    if (    $ssl)
    $uri="ssl://$address:995";
    else
    $uri="tcp://$address:110";

    $fp=fsockopen($uri);

    if (!    $fp)
    return(    NULL);

    $st=fgets($fp, 512);
    if (    substr($st, 0, 3)!="+OK")
    {
    fclose($fp);
    return(    NULL);
    }

    $st="USER $username\n";
    if (    fwrite($fp, $st)!=strlen($st))
    {
    fclose($fp);
    return(    NULL);
    }

    $st=fgets($fp, 512);
    if (    substr($st, 0, 3)!="+OK")
    {
    fclose($fp);
    return(    NULL);
    }

    $st="PASS $password\n";
    if (    fwrite($fp, $st)!=strlen($st))
    {
    fclose($fp);
    return(    NULL);
    }

    $st=fgets($fp, 512);
    fclose($fp);
    if (    substr($st, 0, 3)=="+OK")
    return(    true);
    else if (    substr($st, 0, 4)=="+ERR")
    return(    false);
    else
    return(    NULL);
    }
    ?>
    up
    1
    Duukkis
    18 years ago
    Lots of tries and lots of reading http-headers...

    If you want to post $_POST vars and (in this case) one file named userfile to $remote_server and $remote_url.

    <?php
    // get the necessary data
    $file_name = $_FILES['userfile']['name']; // the file
    $tmp_name = $_FILES['userfile']['tmp_name']; // the file
    $content_type = $_FILES['userfile']['type']; // the file mime type

    srand((double)microtime()*1000000);
    $boundary = "---------------------".substr(md5(rand(0,32000)),0,10);

    // Build the header
    $header = "POST $remote_url HTTP/1.0\r\n";
    $header .= "Host: $remote_server\r\n";
    $header .= "Content-type: multipart/form-data, boundary=$boundary\r\n";
    // attach post vars
    foreach($_POST AS $index => $value){
    $data .="--$boundary\r\n";
    $data .= "Content-Disposition: form-data; name=\"".$index."\"\r\n";
    $data .= "\r\n".$value."\r\n";
    $data .="--$boundary\r\n";
    }
    // and attach the file
    $data .= "--$boundary\r\n";
    $content_file = join("", file($tmp_name));
    $data .="Content-Disposition: form-data; name=\"userfile\"; filename=\"$file_name\"\r\n";
    $data .= "Content-Type: $content_type\r\n\r\n";
    $data .= "".$content_file."\r\n";
    $data .="--$boundary--\r\n";
    $header .= "Content-length: " . strlen($data) . "\r\n\r\n";
    // Open the connection
    $fp = fsockopen($remote_server, 80);
    // then just
    fputs($fp, $header.$data);
    fclose($fp);
    ?>
    up
    1
    blazely at removetoemail netspace net au
    21 years ago
    Here's a quick function to establish a connection to a web server that will time out if the connection is lost after a user definable amount of time or if the server can't be reached.

    Also supports Basic authentication if a username/password is specified. Any improvements or criticisms, please email me! :-)

    Returns either a resource ID, an error code or 0 if the server can't be reached at all. Returns -1 in the event that something really wierd happens like a non-standard http response or something. Hope it helps someone.

    Cheers,

    Ben Blazely

    <?php
    function connectToURL($addr, $port, $path, $user="", $pass="", $timeout="30")
    {
    $urlHandle = fsockopen($addr, $port, $errno, $errstr, $timeout);
    if (    $urlHandle)
    {
    socket_set_timeout($urlHandle, $timeout);
    if (    $path)
    {
    $urlString = "GET $path HTTP/1.0\r\nHost: $addr\r\nConnection: Keep-Alive\r\nUser-Agent: MyURLGrabber\r\n";
    if (    $user)
    $urlString .= "Authorization: Basic ".base64_encode("$user:$pass")."\r\n";
    $urlString .= "\r\n";

    fputs($urlHandle, $urlString);

    $response = fgets($urlHandle);

    if (    substr_count($response, "200 OK") > 0) // Check the status of the link
    {
    $endHeader = false; // Strip initial header information
    while ( !$endHeader)
    {
    if (    fgets($urlHandle) == "\r\n")
    $endHeader = true;
    }

    return     $urlHandle; // All OK, return the file handle
    }
    else if (    strlen($response) < 15) // Cope with wierd non standard responses
    {
    fclose($urlHandle);
    return -    1;
    }
    else     // Cope with a standard error response
    {
    fclose($urlHandle);
    return     substr($response,9,3);
    }
    }

    return     $urlHandle;
    }
    else
    {
    return     0;
    }
    }
    }
    ?>
    up
    1
    dan at lovepond dot com
    21 years ago
    Here is some code to help out abit more with the EOF problem.
    I had a problem where I needed to strip out so many lines of server input to get back right data i wanted.

    <?php
    $port    =4000;
    $host="localhost";
    $message="test";
    $status=senddata($host,$port,$message);
    print     "$status";

    function     senddata($host,$port,$message) {

    #takes in account servers that do not return EOF character
    #send data to server and get back input

    #function globals
    $linenumber="2"; #amount of lines to get rid of before we give input
    $lineamount="1"; #amount of lines to read after we give input

    $fp = fsockopen("$host", $port, $errno, $errstr, 30);
    if (!    $fp) {
    echo     "$errstr ($errno)";
    }
    else {
    for (    $i = 1; $i < $linenumber+1; $i++) {
    fread ($fp,1);
    $bytes_left = socket_get_status($fp);
    if (    $bytes_left > 0) { fread($fp, $bytes_left[unread_bytes]); }
    }
    fputs($fp, "$message\r\n");
    for (    $i = 1; $i < $lineamount+1; $i++) {
    $status.=fread($fp,1);
    $bytes_left = socket_get_status($fp);
    if (    $bytes_left > 0) { $status.=fread($fp, $bytes_left[unread_bytes]); }
    }
    fclose ($fp);
    }

    return     $status;
    }

    ?>
    up
    1
    oliver dot christen at camptocamp dot com
    15 years ago
    When downloading large files, it is not really efficient to put the whole server answer in memory before parsing the data to remove the header parts. Here is a simple way to do it while writing the data as it arrive:

    <?php

    // $socket is a valid fsockopen handle

    $out = '';
    $headerendfound = false;
    $fp = fopen($fileTarget, 'w');
    $buffer = '';
    while (!    feof($socket)) {
    $out = fgets ($socket,16384);
    if (    $headerendfound) {
    fwrite($fp, $out);
    print     '.';
    }
    if (!    $headerendfound) {
    $buffer .= $out;
    print     "searching for header\n";
    $headerend = strpos($buffer, "\r\n\r\n");
    if (    $headerend !== false) {
    $headerendfound = true;
    fwrite($fp, substr($buffer, $headerend+4));
    $buffer = '';
    }
    }
    }
    fclose($fp);
    fclose($socket);

    ?>
    up
    1
    konrad dot meyer at gmail dot com
    19 years ago
    The documentation example is of a GET request. I have found POST documentation to be lacking, and here's a function to easily simulate submitting form data:

    <?php
    # $host includes host and path and filename
    # ex: "myserver.com/this/is/path/to/file.php"
    # $query is the POST query data
    # ex: "a=thisstring&number=46&string=thatstring
    # $others is any extra headers you want to send
    # ex: "Accept-Encoding: compress, gzip\r\n"
    function post($host,$query,$others=''){
    $path=explode('/',$host);
    $host=$path[0];
    unset(    $path[0]);
    $path='/'.(implode('/',$path));
    $post="POST $path HTTP/1.1\r\nHost: $host\r\nContent-type: application/x-www-form-urlencoded\r\n${others}User-Agent: Mozilla 4.0\r\nContent-length: ".strlen($query)."\r\nConnection: close\r\n\r\n$query";
    $h=fsockopen($host,80);
    fwrite($h,$post);
    for(    $a=0,$r='';!$a;){
    $b=fread($h,8192);
    $r.=$b;
    $a=(($b=='')?1:0);
    }
    fclose($h);
    return     $r;
    }
    ?>
    up
    3
    asalamanca at redcetus dot com
    20 years ago
    This is a very fast program for test a form or link (many times).
    <?php
    $repeat     = 100; // How many times repeat the test

    $timeout = 100; // Max time for stablish the conection
    $size = 16; // Bytes will be read (and display). 0 for read all

    $server = '127.0.0.1'; // IP address
    $host = 'www.example.net'; // Domain name
    $target = '/poll/answer.asp'; // Specific program
    $referer = 'http://www.example.com/'; // Referer
    $port = 80;

    // Setup an array of fields to get with then create the get string
    $gets = array ( 'get_field_1' => 'somevalue',
    'get_field_2' => 'somevalue' );

    // Setup an array of fields to post with then create the post string
    $posts = array ( 'post_field_1' => 'somevalue',
    'post_field_2' => 'somevalue' );

    // That's all. Now the program proccess $repeat times

    $method = "GET";
    if (     is_array( $gets ) ) {
    $getValues = '?';
    foreach(     $gets AS $name => $value ){
    $getValues .= urlencode( $name ) . "=" . urlencode( $value ) . '&';
    }
    $getValues = substr( $getValues, 0, -1 );
    } else {
    $getValues = '';
    }

    if (     is_array( $posts ) ) {
    foreach(     $posts AS $name => $value ){
    $postValues .= urlencode( $name ) . "=" . urlencode( $value ) . '&';
    }
    $postValues = substr( $postValues, 0, -1 );
    $method = "POST";
    } else {
    $postValues = '';
    }

    $request = "$method $target$getValues HTTP/1.1\r\n";
    $request .= "Host: $host\r\n";
    $request .= 'User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) ';
    $request .= "Gecko/20021204\r\n";
    $request .= 'Accept: text/xml,application/xml,application/xhtml+xml,';
    $request .= 'text/html;q=0.9,text/plain;q=0.8,video/x-mng,image/png,';
    $request .= "image/jpeg,image/gif;q=0.2,text/css,*/*;q=0.1\r\n";
    $request .= "Accept-Language: en-us, en;q=0.50\r\n";
    $request .= "Accept-Encoding: gzip, deflate, compress;q=0.9\r\n";
    $request .= "Accept-Charset: ISO-8859-1, utf-8;q=0.66, *;q=0.66\r\n";
    $request .= "Keep-Alive: 300\r\n";
    $request .= "Connection: keep-alive\r\n";
    $request .= "Referer: $referer\r\n";
    $request .= "Cache-Control: max-age=0\r\n";

    if (     $method == "POST" ) {
    $lenght = strlen( $postValues );
    $request .= "Content-Type: application/x-www-form-urlencoded\r\n";
    $request .= "Content-Length: $lenght\r\n";
    $request .= "\r\n";
    $request .= $postValues;
    }

    for (     $i = 0; $i < $repeat; $i++ ) {
    $socket = fsockopen( $server, $port, $errno, $errstr, $timeout );
    fputs( $socket, $request );
    if (     $size > 0 ) {
    $ret = fgets( $socket, $size );
    } else {
    $ret = '';
    while ( !    feof( $socket ) ) {
    $ret .= fgets( $socket, 4096 );
    }
    }
    fclose( $socket );
    echo     "<hr> $i -- $content $ret";
    }
    ?>

    Alejandro Salamanca
    up
    2
    anarchy
    17 years ago
    The DEFAULT stream timeout is set according to default_socket_timeout in your php.ini file. Took forever for me to dig that up....
    up
    2
    Jeremy Saintot
    13 years ago
    Here is my fsockopen-based HTTP request fonction (GET and POST) :

    <?php
    function http_request(
    $verb = 'GET', /* HTTP Request Method (GET and POST supported) */
    $ip, /* Target IP/Hostname */
    $port = 80, /* Target TCP port */
    $uri = '/', /* Target URI */
    $getdata = array(), /* HTTP GET Data ie. array('var1' => 'val1', 'var2' => 'val2') */
    $postdata = array(), /* HTTP POST Data ie. array('var1' => 'val1', 'var2' => 'val2') */
    $cookie = array(), /* HTTP Cookie Data ie. array('var1' => 'val1', 'var2' => 'val2') */
    $custom_headers = array(), /* Custom HTTP headers ie. array('Referer: http://localhost/ */
    $timeout = 1, /* Socket timeout in seconds */
    $req_hdr = false, /* Include HTTP request headers */
    $res_hdr = false /* Include HTTP response headers */
    )
    {
    $ret = '';
    $verb = strtoupper($verb);
    $cookie_str = '';
    $getdata_str = count($getdata) ? '?' : '';
    $postdata_str = '';

    foreach (    $getdata as $k => $v)
    $getdata_str .= urlencode($k) .'='. urlencode($v) . '&';

    foreach (    $postdata as $k => $v)
    $postdata_str .= urlencode($k) .'='. urlencode($v) .'&';

    foreach (    $cookie as $k => $v)
    $cookie_str .= urlencode($k) .'='. urlencode($v) .'; ';

    $crlf = "\r\n";
    $req = $verb .' '. $uri . $getdata_str .' HTTP/1.1' . $crlf;
    $req .= 'Host: '. $ip . $crlf;
    $req .= 'User-Agent: Mozilla/5.0 Firefox/3.6.12' . $crlf;
    $req .= 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' . $crlf;
    $req .= 'Accept-Language: en-us,en;q=0.5' . $crlf;
    $req .= 'Accept-Encoding: deflate' . $crlf;
    $req .= 'Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7' . $crlf;

    foreach (    $custom_headers as $k => $v)
    $req .= $k .': '. $v . $crlf;

    if (!empty(    $cookie_str))
    $req .= 'Cookie: '. substr($cookie_str, 0, -2) . $crlf;

    if (    $verb == 'POST' && !empty($postdata_str))
    {
    $postdata_str = substr($postdata_str, 0, -1);
    $req .= 'Content-Type: application/x-www-form-urlencoded' . $crlf;
    $req .= 'Content-Length: '. strlen($postdata_str) . $crlf . $crlf;
    $req .= $postdata_str;
    }
    else     $req .= $crlf;

    if (    $req_hdr)
    $ret .= $req;

    if ((    $fp = @fsockopen($ip, $port, $errno, $errstr)) == false)
    return     "Error $errno: $errstr\n";

    stream_set_timeout($fp, 0, $timeout * 1000);

    fputs($fp, $req);
    while (    $line = fgets($fp)) $ret .= $line;
    fclose($fp);

    if (!    $res_hdr)
    $ret = substr($ret, strpos($ret, "\r\n\r\n") + 4);

    return     $ret;
    }
    ?>

    Example usages :

    <?php
    echo http_request('GET', 'www.php.net');
    echo     http_request('GET', 'www.php.net', 80, '/manual/en/function.phpinfo.php');
    echo     http_request('GET', 'www.php.net', 80, '/manual/en/function.phpinfo.php', array('get1' => 'v_get1'), array(), array('cookie1' => 'v_cookie1'), array('X-My-Header' => 'My Value'));
    ?>

    [EDIT BY danbrown AT php DOT net: Contains a bugfix provided by "Wrinkled Cheese" on 24-JUN-2011 to fix the $getdata foreach() loop; another bugfix provided by Suat Secmen on 12-JAN-2012 to fix a $timeout = 1000, then stream_set_timeout($fp, 0, $timeout * 1000), equaling 1,000 seconds.]
    up
    1
    richardaburton at hotmail dot com
    21 years ago
    Improved HTTP/1.1 chunked transfer-encoding example.

    The sample code given below by Jack does not function correctly when run against a recent version of Apache (I'm assuming that this did once work, but from the HTTP/1.1 spec I can only assume if it did work it was based mostly on luck).

    <?php

    $header     = "";
    $response = "";

    // connect
    if (!($request=fsockopen('example.com',80,$errno,$errstr))) exit($errstr);
    else {
    socket_set_timeout($request,10);
    // send request
    fwrite($request,$post);
    // get header
    do $header.=fread($request,1); while (!preg_match('/\\r\\n\\r\\n$/',$header));
    // check for chunked encoding
    if (preg_match('/Transfer\\-Encoding:\\s+chunked\\r\\n/',$header))
    do {
    $byte = "";
    $chunk_size="";
    do {
    $chunk_size.=$byte;
    $byte=fread($request,1);
    } while (    $byte!="\\r"); // till we match the CR
    fread($request, 1); // also drop off the LF
    $chunk_size=hexdec($chunk_size); // convert to real number
    $response.=fread($request,$chunk_size);
    fread($request,2); // ditch the CRLF that trails the chunk
    } while ($chunk_size); // till we reach the 0 length chunk (end marker)
    else {
    // check for specified content length
    if (preg_match('/Content\\-Length:\\s+([0-9]*)\\r\\n/',$header,$matches)) {
    $response=fread($request,$matches[1]);
    } else {
    // not a nice way to do it (may also result in extra CRLF which trails the real content???)
    while (!feof($request)) $response .= fread($request, 4096);
    }
    }
    // close connection
    fclose($request);
    }

    // do something useful with the response
    print($header);
    print(    $response);

    ?>

    Richard.
    up
    1
    iain at monitormedia dot co dot uk
    22 years ago
    Here's how to send an email using SMTP. This includes rudimentary checking on server responses during the process of sending an email. Could be improved by more comprehensive processing of the result codes...or going on to the next mail exchanger when you fail after connecting to the first.

    <?php

    function another_mail($to,$subject,$headers,$message)
    {
    // Could get this from the php ini?
    $from="me@example.com";
    list(    $me,$mydomain) = split("@",$from);

    // Now look up the mail exchangers for the recipient
    list($user,$domain) = split("@",$to,2);
    if(    getmxrr($domain,$mx,$weight) == 0) return FALSE;

    // Try them in order of lowest weight first
    array_multisort($mx,$weight);
    $success=0;

    foreach(    $mx as $host) {
    // Open an SMTP connection
    $connection = fsockopen ($host, 25, $errno, $errstr, 1);
    if (!    $connection)
    continue;
    $res=fgets($connection,256);
    if(    substr($res,0,3) != "220") break;

    // Introduce ourselves
    fputs($connection, "HELO $mydomain\n");
    $res=fgets($connection,256);
    if(    substr($res,0,3) != "250") break;

    // Envelope from
    fputs($connection, "MAIL FROM: $from\n");
    $res=fgets($connection,256);
    if(    substr($res,0,3) != "250") break;

    // Envelope to
    fputs($connection, "RCPT TO: $to\n");
    $res=fgets($connection,256);
    if(    substr($res,0,3) != "250") break;

    // The message
    fputs($connection, "DATA\n");
    $res=fgets($connection,256);
    if(    substr($res,0,3) != "354") break;

    // Send To:, From:, Subject:, other headers, blank line, message, and finish
    // with a period on its own line.
    fputs($connection, "To: $to\nFrom: $from\nSubject: $subject\n$headers\n\n$message\n.\n");
    $res=fgets($connection,256);
    if(    substr($res,0,3) != "250") break;

    // Say bye bye
    fputs($connection,"QUIT\n");
    $res=fgets($connection,256);
    if(    substr($res,0,3) != "221") break;

    // It worked! So break out of the loop which tries all the mail exchangers.
    $success=1;
    break;
    }
    // Debug for if we fall over - uncomment as desired
    // print $success?"Mail sent":"Failure: $res\n";
    if($connection) {
    if(    $success==0) fputs($connection, "QUIT\n");
    fclose ($connection);
    }
    return     $success?TRUE:FALSE;
    }

    another_mail("recipient@example.com","My Subject","X-mailer: PHP Script\nX-another-header: Whatever","Test email body.\n\nNote if you actually put a period on a line\nby itself, the function will terminate prematurely.\n\nYou will get a partial email sent though.\n");
    ?>
    up
    1
    kexianbin at diyism dot com
    12 years ago
    My recursive unchunk function:

    <?php
    function unchunk($result)
    {return     preg_replace('/([0-9A-F]+)\r\n(.*)/sie',
    '($cnt=@base_convert("\1", 16, 10))
    ?substr(($str=@strtr(\'\2\', array(\'\"\'=>\'"\', \'\\\\0\'=>"\x00"))), 0, $cnt).unchunk(substr($str, $cnt+2))
    :""
    '    ,
    $result
    );
    }
    ?>
    up
    1
    xbensemhoun at t-systems dot fr
    21 years ago
    To make a telnet connection with a Cisco router:

    <?php
    $cfgServer     = "nnn.nnn.nnn.nnn"; //IP of your router
    $cfgPort = 23; //port, 22 if SSH
    $cfgTimeOut = 10;

    $usenet = fsockopen($cfgServer, $cfgPort, $errno, $errstr, $cfgTimeOut);

    if(!    $usenet)
    {
    echo     "Connexion failed\n";
    exit();
    }
    else
    {
    echo     "Connected\n<BR>";
    fputs ($usenet, "toto\r\n");
    fputs ($usenet, "en\r\n");
    fputs ($usenet, "tutu\r\n");
    fputs ($usenet, "exit\r\n");
    while (!    feof($usenet))
    {
    echo     ". ".fgets($usenet, 128)."<BR>\n";
    }
    }
    ?>

    Then you will have:
    Connected
    . ��������
    .
    . User Access Verification
    .
    . Password:
    . testXB>en
    . Password:
    . testXB#exit
    .
    up
    1
    Goce Dokoski
    6 years ago
    Trying to fsockopen an ssl:// connection, but it was hanging for a long time, ignoring timeout parameter, and eventually returning false, without an error message.

    Turns out (at least) on Windows it validates certificates and doesn't have a valid certificate store.

    This worked for me:

    - download Mozilla's certificate store from https://curl.haxx.se/ca/cacert.pem
    - copy it inside php installation (for example: c:\php)
    - and set it up in php.ini

    openssl.cafile="c:\php\cacert.pem"

    My system: Apache/2.4.29 (Win64) OpenSSL/1.0.2n PHP/5.6.38
    up
    1
    p14nd4
    10 years ago
    It appears that in PHP 5.6.0 (at least the version in Debian jessie, with openssl 1.0.1h-3), this function *is* now validating SSL certificates (in a variety of ways). First, it appears to fail for untrusted certificates (i.e. no matching CA trusted locally), and secondly, it appears to fail for mismatched hostnames in the request and certificate.

    ---------
    $ echo "<?php echo fsockopen(\"ssl://localhost\", 993); ?>" | php -a
    Interactive mode enabled

    PHP Warning    : fsockopen(): Peer certificate CN=`my.test.server' did not match expected CN=`localhost' in - on line 1
    PHP Warning: fsockopen(): Failed to enable crypto in - on line 1
    PHP Warning: fsockopen(): unable to connect to ssl://localhost:993 (Unknown error) in - on line 1
    ----------
    $ echo "<?php echo fsockopen(\"ssl://my.test.server\", 993); ?>" | php -a
    Interactive mode enabled

    PHP Warning: fsockopen(): SSL operation failed with code 1. OpenSSL Error messages:
    error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed in - on line 1
    PHP Warning: fsockopen(): Failed to enable crypto in - on line 1
    PHP Warning: fsockopen(): unable to connect to ssl://my.test.server:993 (Unknown error) in - on line 1
    ---------
    #installed CA locally
    ---------
    $ echo "<?php echo fsockopen(\"ssl://my.test.server\", 993); ?>" | php -a
    Interactive mode enabled

    Resource id #1
    up
    0
    jszoja at gmail dot com
    2 years ago
    Opening non-existing socket file via `unix//` protocol will result in exception also when suppressing error with @ like:
    <?php
    $fh     = @fsockopen('unix:///var/run/file-not-exists.sock');
    ?>

    It is important to know when migrating from PHP 7.4 to 8.x, as handling error suppression with @ has changed.
    up
    0
    perrya at shoalhaven dot nsw dot gov dot au
    8 years ago
    on my FreeBSD vm, with Joomla, I was getting the error

    fsockopen(): unable to connect to ssl://localhost:443 (Unknown error)

    when using a contact form and also the module updating process.

    After reading other notes on here, regarding certificate validation, I installed the port ca_root_nss

    (Root certificates from certificate authorities included in the Mozilla
    NSS library and thus in Firefox and Thunderbird.)

    Now it works
    up
    0
    gratcypalma at gmail dot com
    14 years ago
    <?php
    /*
    this script i used for remote my PvPGN Server, to check email user.
    not good, but it work.
    */

    set_time_limit(0);
    $host = 'host';
    $port = 'port';
    $user = 'user';
    $pass = 'pass';
    $socket = fsockopen($host, $port) or die('Could not connect to: '.$host);
    $userdota = "palma";
    if(    $socket)
    {
    sendcmd("\r",$socket);
    $status = "open"; // set status open

    while($status=="open") //while we are connected to the server
    {
    $line = @fgets($socket, 1024) ;
    /////////////login////////////////
    if (strstr($line, "there is no guest account"))
    {
    sendcmd($user."\r\n",$socket);
    sendcmd($pass."\r\n",$socket);
    }
    //////////////send command ////////////////////
    if (strstr($line,"Your unique name: ".$user))
    {     sendcmd("/finger ".$userdota."\r\n",$socket);
    }

    //////////////get email////////////////////
    if (strstr($line,"email:")) // if respone server write "email:"
    {
    $pattern = '/email:(.*) ,/';
    preg_match($pattern, $line, $matches);
    fclose($socket);
    $status="close"; // status close
    $matches=str_replace(" ","", $matches);
    $matches=str_replace(",is_operator:0,is_admin:0,","", $matches);
    $matches=str_replace("email:","", $matches);
    print     $matches[0];
    $email=$matches[0];
    }
    if (    strstr($line,"ERROR: Invalid user.")) // if respone server write "ERROR: Invalid user."
    {

    fclose($socket);
    $status="close";
    $error ="Invalid User"; // error message
    }

    ////////////login failed //////////////////////////
    if (strstr($line, "Login failed")) // if respone server write "Login failed"
    {
    $error = "Login Failed"; // error message
    fclose($socket);
    $status="close";
    }

    flush(); // close

    }

    }
    function     sendcmd($cmd,$socket) // send command function
    {
    fputs($socket, $cmd, strlen($cmd));
    }
    ?>
    up
    0
    jabeba at web dot de
    16 years ago
    If you have to use a proxy to make requests outside of your local network, you may use this class:

    <?php
    /*
    *
    * No Proxy Authentification Implemented; PHP 5
    *
    */

    class RemoteFopenViaProxy {

    private     $result;
    private     $proxy_name;
    private     $proxy_port;
    private     $request_url;

    public function     get_proxy_name() {
    return     $this->proxy_name;
    }

    public function     set_proxy_name($n) {
    $this->proxy_name = $n;
    }

    public function     get_proxy_port() {
    return     $this->proxy_port;
    }

    public function     set_proxy_port($p) {
    $this->proxy_port = $p;
    }

    public function     get_request_url() {
    return     $this->request_url;
    }

    public function     set_request_url($u) {
    $this->request_url = $u;
    }

    public function     get_result() {
    return     $this->result;
    }

    public function     set_result($r) {
    $this->result = $r;
    }

    private function     get_url_via_proxy() {

    $proxy_fp = fsockopen($this->get_proxy_name(), $this->get_proxy_port());

    if (!    $proxy_fp) {
    return     false;
    }
    fputs($proxy_fp, "GET " . $this->get_request_url() . " HTTP/1.0\r\nHost: " . $this->get_proxy_name() . "\r\n\r\n");
    while (!    feof($proxy_fp)) {
    $proxy_cont .= fread($proxy_fp, 4096);
    }
    fclose($proxy_fp);
    $proxy_cont = substr($proxy_cont, strpos($proxy_cont, "\r\n\r\n") + 4);
    return     $proxy_cont;

    }

    private function     get_url($url) {
    $fd = @ file($url);
    if (    $fd) {
    return     $fd;
    } else {
    return     false;
    }
    }

    private function     logger($line, $file) {
    $fd = fopen($file . ".log", "a+");
    fwrite($fd, date("Ymd G:i:s") . " - " . $file . " - " . $line . "\n");
    fclose($fd);
    }

    function     __construct($url, $proxy_name = "", $proxy_port = "") {

    $this->set_request_url($url);
    $this->set_proxy_name($proxy_name);
    $this->set_proxy_port($proxy_port);

    }

    public function     request_via_proxy() {

    $this->set_result($this->get_url_via_proxy());
    if (!    $this->get_result()) {
    $this->logger("FAILED: get_url_via_proxy(" . $this->get_proxy_name() . "," . $this->get_proxy_port() . "," . $this->get_request_url() . ")", "RemoteFopenViaProxyClass.log");
    }
    }

    public function     request_without_proxy() {

    $this->set_result($this->get_url($this->get_request_url()));
    if (!    $this->get_result()) {
    $this->logger("FAILED: get_url(" . $url . ")", "RemoteFopenViaProxyClass.log");
    }
    }
    }
    ?>

    Use it this way:

    <?php
    // call constructor
    $obj = new RemoteFopenViaProxy($insert_request_url, $insert_proxy_name, $insert_proxy_port);
    // change settings after object generation
    $obj->set_proxy_name($insert_proxy_name);
    $obj->set_proxy_port($insert_proxy_port);
    $obj->set_request_url($insert_request_url);
    $obj->request_via_proxy();
    echo     $obj->get_result();
    ?>

    If there are errors during execution, the script tries to write some useful information into a log file.
    up
    -1
    walter
    15 years ago
    For some reason the default FreeBSD 7.0 port (jailed environment) breaks fsockopen() on SSL URLs, returning a constant stream of nothing! In my case this resulted in php-cgi bringing down lighttpd completely, in rapid time! Avoid FreeBSD/jails/fsockopen + SSL. Use curl_init() instead.
    up
    -1
    jack at jtr dot de
    20 years ago
    Here is a function for testing a website/URI for availability:

    <?php
    /*
    * @return boolean
    * @param string $link
    * @desc ?berpr?ft die angegeben URL auf Erreichbarkeit (HTTP-Code: 200)
    */
    function url_validate( $link )
    {
    $url_parts = @parse_url( $link );

    if ( empty(     $url_parts["host"] ) ) return( false );

    if ( !empty(     $url_parts["path"] ) )
    {
    $documentpath = $url_parts["path"];
    }
    else
    {
    $documentpath = "/";
    }

    if ( !empty(     $url_parts["query"] ) )
    {
    $documentpath .= "?" . $url_parts["query"];
    }

    $host = $url_parts["host"];
    $port = $url_parts["port"];
    // Now (HTTP-)GET $documentpath at $host";

    if (empty( $port ) ) $port = "80";
    $socket = @fsockopen( $host, $port, $errno, $errstr, 30 );
    if (!    $socket)
    {
    return(    false);
    }
    else
    {
    fwrite ($socket, "HEAD ".$documentpath." HTTP/1.0\r\nHost: $host\r\n\r\n");
    $http_response = fgets( $socket, 22 );

    if (     ereg("200 OK", $http_response, $regs ) )
    {
    return(    true);
    fclose( $socket );
    } else
    {
    // echo "HTTP-Response: $http_response<br>";
    return(false);
    }
    }
    }
    ?>
    up
    -1
    terminal
    21 years ago
    Try this.
    Use AUTH when necessary.
    Read RFC 821 when having problems.

    <?php

    $handle     = smtp_connect($smtp_server, 25, 30, 1, 1, 1);
    echo     smtp_command($handle, "EHLO $domain\r\n", 1, 1);
    echo     smtp_command($handle, "MAIL FROM:<$from_mail>\r\n", 1, 1);
    echo     smtp_command($handle, "RCPT TO:<$to_mail>\r\n", 1, 1);
    echo     smtp_command($handle, "DATA\r\n", 1, 1);
    echo     smtp_command($handle, "$message\r\n.\r\n", 1, 1);
    // don't do it like this - it will hang up
    // echo smtp_command($handle, "$message", 1, 1);
    // echo smtp_command($handle, "\r\n.\r\n", 1, 1);
    echo smtp_command($handle, "QUIT\r\n", 1, 1);
    smtp_close($handle);


    function     smtp_connect($host, $port, $timeout=30, $echo_command=False, $echo_response=False, $nl2br=False)
    {
    $errno = 0;
    $errstr = 0;
    if(    $echo_command)
    {
    if(    $nl2br) { echo nl2br("CONNECTING TO $host\r\n"); }
    else { echo     "CONNECTING TO $host\r\n"; }
    }
    $handle = fsockopen($host, $port, $errno, $errstr, $timeout);
    if(!    $handle)
    {
    if(    $echo_command)
    {
    if(    $nl2br) { echo nl2br("CONNECTION FAILED\r\n"); }
    else { echo     "CONNECTION FAILED\r\n"; }
    }
    return     False;
    }
    if(    $echo_command)
    {
    if(    $nl2br) { echo nl2br("SUCCESS\r\n"); }
    else { echo     "SUCCESS\r\n"; }
    }
    $response = fgets($handle,1);
    $bytes_left = socket_get_status($handle);
    if (    $bytes_left > 0) { $response .= fread($handle, $bytes_left["unread_bytes"]); }
    if(    $echo_response)
    {
    if(    $nl2br) { echo nl2br($response); }
    else { echo     $response; }
    }
    return     $handle;
    }

    function     smtp_command($handle, $command, $echo_command=False, $nl2br=False)
    {
    if(    $echo_command)
    {
    if(    $nl2br) { echo nl2br($command); }
    else { echo     $command; }
    }
    fputs($handle, $command);
    $response = fgets($handle,1);
    $bytes_left = socket_get_status($handle);
    if (    $bytes_left > 0) { $response .= fread($handle, $bytes_left["unread_bytes"]); }
    if(    $nl2br) { return nl2br($response); }
    else { return     $response; }
    }

    function     smtp_close($handle)
    {
    fclose($handle);
    }
    ?>
    up
    -2
    biguenique at yahoo dot ca
    10 years ago
    Did you know that fsockopen() DOES NOT validate SSL certificates whatsoever? For the sake of World's overall security level, I guess it would be a very positive idea to add a BIG WARNING notice on the manual page!

    Citing the extensive study titled "The Most Dangerous Code in the World: Validating SSL Certificates in Non-Browser Software" published in 2012 (google it if they removed the link) on page 5:

    "PHP provides several methods for establishing SSL connections. For example, fsockopen, which opens a raw socket to the remote server, can be used to connect to SSL servers by putting “ssl://” in the URL. Even though fsockopen does not perform any certificate checks whatsoever, PHP application developers routinely use it for SSL connection establishment (see Section 9)."

    For proper certificate validation with some level of ease, you can always move to cURL, but be careful:

    "PHP also provides a cURL binding, which uses cURL’s default settings to establish SSL connections with proper certificate validation. As we show in Sections 7.1, 7.2, and 7.3, application developers often set cURL options incorrectly, overriding the defaults and breaking certificate validation."

    For more detailed insights, try out the following code:
    <?php readfile("http".str_replace('+', '.', implode('/', array(":", null, "www+cs+utexas+edu", "~shmat", "shmat_ccs12.pdf")))); ?>
    up
    -1
    Sherif Gayed
    21 years ago
    Here is how to connect to the web from behind a proxy server:

    <?php
    /*************start code**************/
    /*your proxy server address*/
    $proxy = "192.168.10.1";
    /*your proxy server port*/
    $port = 8080;
    /*the url you want to connect to*/
    $url = "http://www.php.net/";
    $fp = fsockopen($proxy, $port);
    fputs($fp, "GET $url HTTP/1.0\r\nHost: $proxy\r\n\r\n");
    while(!    feof($fp)){
    $line = fgets($fp, 4000);
    print(    $line);
    }
    fclose($fp);
    /**************end code**************/
    ?>
    up
    -2
    mikey at badpenguins dot com
    16 years ago
    My $0.02 on handling chunked transfer encoded output... Has rudimentary error handling.

    <?php
    //
    // Example usage...
    //
    $server = '127.0.0.1';
    $port = '80';
    $uri = '/cgi-bin/random-cgi';
    $content = 'Your post content...';

    $post_results = httpPost($server,$port,$uri,$content);
    if (!    is_string($post_results)) {
    die(    'uh oh, something went wrong');
    } else {
    die(    'Here are your results: ' . $post_results);
    }

    //
    // Post provided content to an http server and optionally
    // convert chunk encoded results. Returns false on errors,
    // result of post on success. This example only handles http,
    // not https.
    //
    function httpPost($ip=null,$port=80,$uri=null,$content=null) {
    if (empty(    $ip)) { return false; }
    if (!    is_numeric($port)) { return false; }
    if (empty(    $uri)) { return false; }
    if (empty(    $content)) { return false; }
    // generate headers in array.
    $t = array();
    $t[] = 'POST ' . $uri . ' HTTP/1.1';
    $t[] = 'Content-Type: text/html';
    $t[] = 'Host: ' . $ip . ':' . $port;
    $t[] = 'Content-Length: ' . strlen($content);
    $t[] = 'Connection: close';
    $t = implode("\r\n",$t) . "\r\n\r\n" . $content;
    //
    // Open socket, provide error report vars and timeout of 10
    // seconds.
    //
    $fp = @fsockopen($ip,$port,$errno,$errstr,10);
    // If we don't have a stream resource, abort.
    if (!(get_resource_type($fp) == 'stream')) { return false; }
    //
    // Send headers and content.
    //
    if (!fwrite($fp,$t)) {
    fclose($fp);
    return     false;
    }
    //
    // Read all of response into $rsp and close the socket.
    //
    $rsp = '';
    while(!    feof($fp)) { $rsp .= fgets($fp,8192); }
    fclose($fp);
    //
    // Call parseHttpResponse() to return the results.
    //
    return parseHttpResponse($rsp);
    }

    //
    // Accepts provided http content, checks for a valid http response,
    // unchunks if needed, returns http content without headers on
    // success, false on any errors.
    //
    function parseHttpResponse($content=null) {
    if (empty(    $content)) { return false; }
    // split into array, headers and content.
    $hunks = explode("\r\n\r\n",trim($content));
    if (!    is_array($hunks) or count($hunks) < 2) {
    return     false;
    }
    $header = $hunks[count($hunks) - 2];
    $body = $hunks[count($hunks) - 1];
    $headers = explode("\n",$header);
    unset(    $hunks);
    unset(    $header);
    if (!    verifyHttpResponse($headers)) { return false; }
    if (    in_array('Transfer-Encoding: chunked',$headers)) {
    return     trim(unchunkHttpResponse($body));
    } else {
    return     trim($body);
    }
    }

    //
    // Validate http responses by checking header. Expects array of
    // headers as argument. Returns boolean.
    //
    function validateHttpResponse($headers=null) {
    if (!    is_array($headers) or count($headers) < 1) { return false; }
    switch(    trim(strtolower($headers[0]))) {
    case     'http/1.0 100 ok':
    case     'http/1.0 200 ok':
    case     'http/1.1 100 ok':
    case     'http/1.1 200 ok':
    return     true;
    break;
    }
    return     false;
    }

    //
    // Unchunk http content. Returns unchunked content on success,
    // false on any errors... Borrows from code posted above by
    // jbr at ya-right dot com.
    //
    function unchunkHttpResponse($str=null) {
    if (!    is_string($str) or strlen($str) < 1) { return false; }
    $eol = "\r\n";
    $add = strlen($eol);
    $tmp = $str;
    $str = '';
    do {
    $tmp = ltrim($tmp);
    $pos = strpos($tmp, $eol);
    if (    $pos === false) { return false; }
    $len = hexdec(substr($tmp,0,$pos));
    if (!    is_numeric($len) or $len < 0) { return false; }
    $str .= substr($tmp, ($pos + $add), $len);
    $tmp = substr($tmp, ($len + $pos + $add));
    $check = trim($tmp);
    } while(!empty(    $check));
    unset(    $tmp);
    return     $str;
    }

    ?>
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