Source for file Socket.php
Documentation is available at Socket.php
// +----------------------------------------------------------------------+
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2003 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/2_02.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Stig Bakken <ssb@php.net> |
// | Chuck Hagenbuch <chuck@horde.org> |
// +----------------------------------------------------------------------+
// $Id: Socket.php,v 1.38 2008/02/15 18:24:17 chagenbu Exp $
define('NET_SOCKET_WRITE', 2 );
define('NET_SOCKET_ERROR', 4 );
* Generalized Socket class.
* @author Stig Bakken <ssb@php.net>
* @author Chuck Hagenbuch <chuck@horde.org>
class Net_Socket extends PEAR {
* Whether the socket is blocking. Defaults to true.
* Whether the socket is persistent. Defaults to false.
* @var boolean $persistent
* The IP address to connect to.
* The port number to connect to.
* Number of seconds to wait on socket connections before assuming
* there's no more data. Defaults to no timeout.
* Number of bytes to read at a time in readLine() and
* readAll(). Defaults to 2048.
* @var integer $lineLength
* Connect to the specified port. If called when the socket is
* already connected, it disconnects and connects again.
* @param string $addr IP address or host name.
* @param integer $port TCP port number.
* @param boolean $persistent (optional) Whether the connection is
* persistent (kept open between requests
* @param integer $timeout (optional) How long to wait for data.
* @param array $options See options for stream_context_create.
* @return boolean | PEAR_Error True on success or a PEAR_Error on failure.
function connect ($addr, $port = 0 , $persistent = null , $timeout = null , $options = null )
return $this->raiseError ('$addr cannot be empty');
strstr($addr, '/') !== false ) {
$this->port = $port % 65536;
if ($persistent !== null ) {
$this->persistent = $persistent;
$this->timeout = $timeout;
$openfunc = $this->persistent ? 'pfsockopen' : 'fsockopen';
$old_track_errors = @ini_set('track_errors', 1 );
$timeout = $this->timeout;
// Since PHP 5 fsockopen doesn't allow context specification
$flags = $this->persistent ? STREAM_CLIENT_PERSISTENT : STREAM_CLIENT_CONNECT;
$addr = $this->addr . ':' . $this->port;
$fp = @$openfunc($this->addr, $this->port, $errno, $errstr, $timeout, $context);
$fp = @$openfunc($this->addr, $this->port, $errno, $errstr, $this->timeout);
$fp = @$openfunc($this->addr, $this->port, $errno, $errstr);
if ($errno == 0 && isset ($php_errormsg)) {
@ini_set('track_errors', $old_track_errors);
return $this->raiseError ($errstr, $errno);
@ini_set('track_errors', $old_track_errors);
return $this->setBlocking ($this->blocking);
* Disconnects from the peer, closes the socket.
* @return mixed true on success or a PEAR_Error instance otherwise
return $this->raiseError ('not connected');
* Find out if the socket is in blocking mode.
* @return boolean The current blocking mode.
* Sets whether the socket connection should be blocking or
* not. A read call to a non-blocking socket will return immediately
* if there is no data available, whereas it will block until there
* is data for blocking sockets.
* @param boolean $mode True for blocking sockets, false for nonblocking.
* @return mixed true on success or a PEAR_Error instance otherwise
function setBlocking ($mode)
return $this->raiseError ('not connected');
* Sets the timeout value on socket descriptor,
* expressed in the sum of seconds and microseconds
* @param integer $seconds Seconds.
* @param integer $microseconds Microseconds.
* @return mixed true on success or a PEAR_Error instance otherwise
function setTimeout ($seconds, $microseconds)
return $this->raiseError ('not connected');
* Sets the file buffering size on the stream.
* See php's stream_set_write_buffer for more information.
* @param integer $size Write buffer size.
* @return mixed on success or an PEAR_Error object otherwise
function setWriteBuffer ($size)
return $this->raiseError ('not connected');
return $this->raiseError ('Cannot set write buffer.');
* Returns information about an existing socket resource.
* Currently returns four entries in the result array:
* timed_out (bool) - The socket timed out waiting for data<br>
* blocked (bool) - The socket was blocked<br>
* eof (bool) - Indicates EOF event<br>
* unread_bytes (int) - Number of bytes left in the socket buffer<br>
* @return mixed Array containing information about existing socket resource or a PEAR_Error instance otherwise
return $this->raiseError ('not connected');
* Get a specified line of data
* @return $size bytes of data from the socket, or a PEAR_Error if
return $this->raiseError ('not connected');
return @fgets($this->fp, $size);
* Read a specified amount of data. This is guaranteed to return,
* and has the added benefit of getting everything in one fread()
* chunk; if you know the size of the data you're getting
* beforehand, this is definitely the way to go.
* @param integer $size The number of bytes to read from the socket.
* @return $size bytes of data from the socket, or a PEAR_Error if
return $this->raiseError ('not connected');
return @fread($this->fp, $size);
* Write a specified amount of data.
* @param string $data Data to write.
* @param integer $blocksize Amount of data to write at once.
* NULL means all at once.
* @return mixed If the socket is not connected, returns an instance of PEAR_Error
* If the write succeeds, returns the number of bytes written
* If the write fails, returns false.
function write ($data, $blocksize = null )
return $this->raiseError ('not connected');
if (is_null($blocksize) && !OS_WINDOWS ) {
return @fwrite($this->fp, $data);
$written = @fwrite($this->fp, substr($data, $pos, $blocksize));
if ($written === false ) {
* Write a line of data to the socket, followed by a trailing "\r\n".
* @return mixed fputs result, or an error
function writeLine ($data)
return $this->raiseError ('not connected');
return fwrite($this->fp, $data . "\r\n");
* Tests for end-of-file on a socket descriptor.
* Also returns true if the socket is disconnected.
* @return 1 byte of data from the socket, or a PEAR_Error if
return $this->raiseError ('not connected');
* @return 1 word of data from the socket, or a PEAR_Error if
return $this->raiseError ('not connected');
$buf = @fread($this->fp, 2 );
return (ord($buf[0 ]) + (ord($buf[1 ]) << 8 ));
* @return integer 1 int of data from the socket, or a PEAR_Error if
return $this->raiseError ('not connected');
$buf = @fread($this->fp, 4 );
return (ord($buf[0 ]) + (ord($buf[1 ]) << 8 ) +
(ord($buf[2 ]) << 16 ) + (ord($buf[3 ]) << 24 ));
* Reads a zero-terminated string of data
* @return string, or a PEAR_Error if
return $this->raiseError ('not connected');
while (($char = @fread($this->fp, 1 )) != "\x00") {
* Reads an IP Address and returns it in a dot formatted string
* @return Dot formatted string, or a PEAR_Error if
return $this->raiseError ('not connected');
$buf = @fread($this->fp, 4 );
* Read until either the end of the socket or a newline, whichever
* comes first. Strips the trailing newline from the returned data.
* @return All available data up to a newline, without that
* newline, or until the end of the socket, or a PEAR_Error if
return $this->raiseError ('not connected');
$timeout = time() + $this->timeout;
while (!feof($this->fp) && (!$this->timeout || time() < $timeout)) {
$line .= @fgets($this->fp, $this->lineLength);
if (substr($line, -1 ) == "\n") {
return rtrim($line, "\r\n");
* Read until the socket closes, or until there is no more data in
* the inner PHP buffer. If the inner buffer is empty, in blocking
* mode we wait for at least 1 byte of data. Therefore, in
* blocking mode, if there is no data at all to be read, this
* function will never exit (unless the socket is closed on the
* @return string All data until the socket closes, or a PEAR_Error if
return $this->raiseError ('not connected');
while (!feof($this->fp)) {
$data .= @fread($this->fp, $this->lineLength);
* Runs the equivalent of the select() system call on the socket
* with a timeout specified by tv_sec and tv_usec.
* @param integer $state Which of read/write/error to check for.
* @param integer $tv_sec Number of seconds for timeout.
* @param integer $tv_usec Number of microseconds for timeout.
* @return False if select fails, integer describing which of read/write/error
* are ready, or PEAR_Error if not connected.
function select ($state, $tv_sec, $tv_usec = 0 )
return $this->raiseError ('not connected');
if (false === ($sr = stream_select($read, $write, $except, $tv_sec, $tv_usec))) {
* Turns encryption on/off on a connected socket.
* @param bool $enabled Set this parameter to true to enable encryption
* and false to disable encryption.
* @param integer $type Type of encryption. See
* http://se.php.net/manual/en/function.stream-socket-enable-crypto.php for values.
* @return false on error, true on success and 0 if there isn't enough data and the
* user should try again (non-blocking sockets only). A PEAR_Error object
* is returned if the socket is not connected
function enableCrypto ($enabled, $type)
return $this->raiseError ('not connected');
return $this->raiseError ('Net_Socket::enableCrypto() requires php version >= 5.1.0');
Documentation generated on Mon, 11 Mar 2019 15:23:32 -0400 by phpDocumentor 1.4.4. PEAR Logo Copyright © PHP Group 2004.
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