fsockopen

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

fsockopen — Apre una connessione a un socket appartenente a un dominio Internet o Unix

Descrizione

fsockopen(
    string $hostname,
    int $porta,
    int $errno = ?,
    string $errstr = ?,
    float $timeout = ?
): int

Inizializza una connessione nel dominio Internet (AF_INET, usando TCP o UDP) o Unix (AF_UNIX). Per il dominio Internet, apre una connessione a un socket TCP verso l' hostname sulla porta port. hostname può essere in questo caso, sia un fully qualified domain name o un indirizzo IP. Per le connessioni UDP, è necessario specificare esplicitamente il protocollo, usando: 'udp://' come prefisso di hostname. Per il dominio Unix, hostname viene utilizzato come percorso verso il socket, in questo caso, porta deve essere impostato a 0. Il parametro opzionale timeout può essere usato per impostare un timeout in secondi per la chiamata di sistema connect.

A partire da PHP 4.3.0, se si è compilato con il supporto OpenSSL, si può prefissare hostname con 'ssl://' oppure 'tls://' per utilizzare una connessione client SSL o TLS su una connessione TCP/IP per connettersi all'host remoto.

fsockopen() restituisce un puntatore a file che può essere usato nelle altre funzioni orientate ai file (come fgets(), fgetss(), fputs(), fclose() e feof()).

Se la chiamata non ha successo, viene restituito false e se gli argomenti opzionali errno e errstr sono presenti, vengono impostati a indicare l'errore a livello di sistema che è avvenuto nella chiamata alla funzione connect() del sistema operativo. Se il valore di errno restituito è 0 e la funzione restituisce false, è un'indicazione che l'errore è avvenuto prima della chiamata di connect(). Questo è molto probabilmente legato ad un problema di inizializzazione del socket. Si noti che gli argomenti errno e errstr verranno sempre passati by reference.

A seconda dell'ambiente operativo, il dominio Unix o l'opzionale timeout della connect potrebbero non essere disponibili.

Il socket viene aperto di default in modo blocking. Si può passare al modo non-blocking usando socket_set_blocking().

Example #1 Esempio di fsockopen()

<?php
$fp = fsockopen ("www.php.net", 80, $errno, $errstr, 30);
if (!$fp) {
    echo "$errstr ($errno)<br>\n";
} else {
    fputs ($fp, "GET / HTTP/1.0\r\nHost: www.php.net\r\n\r\n");
    while (!feof($fp)) {
        echo fgets ($fp,128);
    }
    fclose ($fp);
}
?>

L'esempio seguente mostra come ottenere data e ora tramite il servizio UDP "daytime" (porta 13) della vostra stessa macchina.

Example #2 Uso di connessione UDP

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

Nota:
Il parametro timeout è stato introdotto nel PHP 3.0.9 e il supporto UDP è stato aggiunto nel PHP 4.

Vedere anche pfsockopen(), socket_set_blocking(), socket_set_timeout(), fgets(), fgetss(), fputs(), fclose(), feof() e l'estensione Curl.

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User Contributed Notes 42 notes

down

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);

}

?>

down

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);



?>

down

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

            }

        }  

    }

}

?>

down

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];

    }

}

?>

down

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;

?>

down

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.

down

ghzero at ghzero dot de ¶

15 years ago

note:
the default protocol - if not given - seems to be tcp://

down

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";

?>

down

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.]

down

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.

down

edwin at bitstorm dot org ¶

20 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;
}
?>

down

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;

}

?>

down

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;
        }
    } 

?>

down

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+.

down

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

?>

down

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

down

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

down

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);
}
?>

down

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);
?>

down

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;

  }

 }

}

?>

down

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;

}



?>

down

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);

?>

down

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;
}
?>

down

asalamanca at redcetus dot com ¶

21 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

down

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....

down

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.]

down

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.

down

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");

?>

down

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

.

down

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

down

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

down

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.

down

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

                             );

         }

?>

down

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.

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-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.

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-1

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)); 
}
?>

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-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);
            }
        }
    }
?>

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-1

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

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-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);
    }
?>

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-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")))); ?>

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-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**************/

?>

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-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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