<?php

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/**

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* mail_fetch/setup.php

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*

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* Copyright (c) 1999-2011 CDI (cdi@thewebmasters.net) All Rights Reserved

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* Modified by Philippe Mingo 2001-2009 mingo@rotedic.com

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* An RFC 1939 compliant wrapper class for the POP3 protocol.

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*

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* Licensed under the GNU GPL. For full terms see the file COPYING.

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*

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* POP3 class

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*

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* @copyright 1999-2011 The SquirrelMail Project Team

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* @license http://opensource.org/licenses/gpl-license.php GNU Public License

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* @package plugins

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* @subpackage mail_fetch

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*/

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class POP3 {

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var $ERROR = ''; // Error string.

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var $TIMEOUT = 60; // Default timeout before giving up on a

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// network operation.

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var $COUNT = -1; // Mailbox msg count

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var $BUFFER = 512; // Socket buffer for socket fgets() calls.

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// Per RFC 1939 the returned line a POP3

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// server can send is 512 bytes.

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var $FP = ''; // The connection to the server's

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// file descriptor

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var $MAILSERVER = ''; // Set this to hard code the server name

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var $DEBUG = FALSE; // set to true to echo pop3

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// commands and responses to error_log

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// this WILL log passwords!

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var $BANNER = ''; // Holds the banner returned by the

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// pop server - used for apop()

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var $ALLOWAPOP = FALSE; // Allow or disallow apop()

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// This must be set to true

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// manually

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/**

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* PHP5 constructor.

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*/

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function __construct ( $server = '', $timeout = '' ) {

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settype($this->BUFFER,"integer");

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if( !empty($server) ) {

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// Do not allow programs to alter MAILSERVER

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// if it is already specified. They can get around

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// this if they -really- want to, so don't count on it.

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if(empty($this->MAILSERVER))

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$this->MAILSERVER = $server;

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}

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if(!empty($timeout)) {

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settype($timeout,"integer");

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$this->TIMEOUT = $timeout;

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set_time_limit($timeout);

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}

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return true;

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}

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/**

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* PHP4 constructor.

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*/

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public function POP3( $server = '', $timeout = '' ) {

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self::__construct( $server, $timeout );

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}

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function update_timer () {

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set_time_limit($this->TIMEOUT);

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return true;

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}

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function connect ($server, $port = 110) {

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// Opens a socket to the specified server. Unless overridden,

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// port defaults to 110. Returns true on success, false on fail

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// If MAILSERVER is set, override $server with its value.

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if (!isset($port) || !$port) {$port = 110;}

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if(!empty($this->MAILSERVER))

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$server = $this->MAILSERVER;

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if(empty($server)){

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$this->ERROR = "POP3 connect: " . _("No server specified");

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unset($this->FP);

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return false;

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}

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$fp = @fsockopen("$server", $port, $errno, $errstr);

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if(!$fp) {

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$this->ERROR = "POP3 connect: " . _("Error ") . "[$errno] [$errstr]";

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unset($this->FP);

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return false;

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}

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socket_set_blocking($fp,-1);

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$this->update_timer();

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$reply = fgets($fp,$this->BUFFER);

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$reply = $this->strip_clf($reply);

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if($this->DEBUG)

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error_log("POP3 SEND [connect: $server] GOT [$reply]",0);

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if(!$this->is_ok($reply)) {

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$this->ERROR = "POP3 connect: " . _("Error ") . "[$reply]";

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unset($this->FP);

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return false;

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}

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$this->FP = $fp;

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$this->BANNER = $this->parse_banner($reply);

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return true;

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}

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function user ($user = "") {

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// Sends the USER command, returns true or false

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if( empty($user) ) {

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$this->ERROR = "POP3 user: " . _("no login ID submitted");

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return false;

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} elseif(!isset($this->FP)) {

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$this->ERROR = "POP3 user: " . _("connection not established");

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return false;

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} else {

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$reply = $this->send_cmd("USER $user");

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if(!$this->is_ok($reply)) {

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$this->ERROR = "POP3 user: " . _("Error ") . "[$reply]";

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return false;

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} else

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return true;

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}

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}

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function pass ($pass = "") {

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// Sends the PASS command, returns # of msgs in mailbox,

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// returns false (undef) on Auth failure

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if(empty($pass)) {

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$this->ERROR = "POP3 pass: " . _("No password submitted");

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return false;

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} elseif(!isset($this->FP)) {

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$this->ERROR = "POP3 pass: " . _("connection not established");

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return false;

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} else {

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$reply = $this->send_cmd("PASS $pass");

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if(!$this->is_ok($reply)) {

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$this->ERROR = "POP3 pass: " . _("Authentication failed") . " [$reply]";

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$this->quit();

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return false;

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} else {

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// Auth successful.

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$count = $this->last("count");

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$this->COUNT = $count;

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return $count;

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}

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}

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}

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function apop ($login,$pass) {

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// Attempts an APOP login. If this fails, it'll

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// try a standard login. YOUR SERVER MUST SUPPORT

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// THE USE OF THE APOP COMMAND!

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// (apop is optional per rfc1939)

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if(!isset($this->FP)) {

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$this->ERROR = "POP3 apop: " . _("No connection to server");

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return false;

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} elseif(!$this->ALLOWAPOP) {

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$retVal = $this->login($login,$pass);

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return $retVal;

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} elseif(empty($login)) {

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$this->ERROR = "POP3 apop: " . _("No login ID submitted");

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return false;

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} elseif(empty($pass)) {

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$this->ERROR = "POP3 apop: " . _("No password submitted");

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return false;

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} else {

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$banner = $this->BANNER;

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if( (!$banner) or (empty($banner)) ) {

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$this->ERROR = "POP3 apop: " . _("No server banner") . ' - ' . _("abort");

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$retVal = $this->login($login,$pass);

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return $retVal;

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} else {

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$AuthString = $banner;

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$AuthString .= $pass;

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$APOPString = md5($AuthString);

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$cmd = "APOP $login $APOPString";

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$reply = $this->send_cmd($cmd);

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if(!$this->is_ok($reply)) {

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$this->ERROR = "POP3 apop: " . _("apop authentication failed") . ' - ' . _("abort");

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$retVal = $this->login($login,$pass);

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return $retVal;

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} else {

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// Auth successful.

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$count = $this->last("count");

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$this->COUNT = $count;

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return $count;

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}

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}

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}

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}

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function login ($login = "", $pass = "") {

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// Sends both user and pass. Returns # of msgs in mailbox or

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// false on failure (or -1, if the error occurs while getting

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// the number of messages.)

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if( !isset($this->FP) ) {

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$this->ERROR = "POP3 login: " . _("No connection to server");

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return false;

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} else {

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$fp = $this->FP;

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if( !$this->user( $login ) ) {

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// Preserve the error generated by user()

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return false;

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} else {

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$count = $this->pass($pass);

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if( (!$count) || ($count == -1) ) {

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// Preserve the error generated by last() and pass()

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return false;

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} else

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return $count;

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}

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}

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}

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function top ($msgNum, $numLines = "0") {

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// Gets the header and first $numLines of the msg body

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// returns data in an array with each returned line being

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// an array element. If $numLines is empty, returns

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// only the header information, and none of the body.

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if(!isset($this->FP)) {

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$this->ERROR = "POP3 top: " . _("No connection to server");

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return false;

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}

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$this->update_timer();

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$fp = $this->FP;

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$buffer = $this->BUFFER;

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$cmd = "TOP $msgNum $numLines";

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fwrite($fp, "TOP $msgNum $numLines\r\n");

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$reply = fgets($fp, $buffer);

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$reply = $this->strip_clf($reply);

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if($this->DEBUG) {

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@error_log("POP3 SEND [$cmd] GOT [$reply]",0);

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}

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if(!$this->is_ok($reply))

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{

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$this->ERROR = "POP3 top: " . _("Error ") . "[$reply]";

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return false;

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}

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$count = 0;

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$MsgArray = array();

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$line = fgets($fp,$buffer);

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while ( !preg_match('/^\.\r\n/',$line))

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{

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$MsgArray[$count] = $line;

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$count++;

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$line = fgets($fp,$buffer);

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if(empty($line)) { break; }

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}

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return $MsgArray;

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}

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function pop_list ($msgNum = "") {

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// If called with an argument, returns that msgs' size in octets

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// No argument returns an associative array of undeleted

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// msg numbers and their sizes in octets

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if(!isset($this->FP))

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{

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$this->ERROR = "POP3 pop_list: " . _("No connection to server");

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return false;

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}

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$fp = $this->FP;

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$Total = $this->COUNT;

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if( (!$Total) or ($Total == -1) )

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{

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return false;

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}

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if($Total == 0)

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{

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return array("0","0");

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// return -1; // mailbox empty

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}

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$this->update_timer();

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if(!empty($msgNum))

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{

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$cmd = "LIST $msgNum";

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fwrite($fp,"$cmd\r\n");

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$reply = fgets($fp,$this->BUFFER);

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$reply = $this->strip_clf($reply);

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if($this->DEBUG) {

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@error_log("POP3 SEND [$cmd] GOT [$reply]",0);

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}

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if(!$this->is_ok($reply))

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{

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$this->ERROR = "POP3 pop_list: " . _("Error ") . "[$reply]";

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return false;

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}

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list($junk,$num,$size) = preg_split('/\s+/',$reply);

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return $size;

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}

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$cmd = "LIST";

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$reply = $this->send_cmd($cmd);

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if(!$this->is_ok($reply))

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{

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$reply = $this->strip_clf($reply);

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$this->ERROR = "POP3 pop_list: " . _("Error ") . "[$reply]";

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return false;

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}

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$MsgArray = array();

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$MsgArray[0] = $Total;

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for($msgC=1;$msgC <= $Total; $msgC++)

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{

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if($msgC > $Total) { break; }

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$line = fgets($fp,$this->BUFFER);

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$line = $this->strip_clf($line);

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if(strpos($line, '.') === 0)

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{

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$this->ERROR = "POP3 pop_list: " . _("Premature end of list");

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return false;

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}

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list($thisMsg,$msgSize) = preg_split('/\s+/',$line);

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settype($thisMsg,"integer");

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if($thisMsg != $msgC)

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{

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$MsgArray[$msgC] = "deleted";

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}

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else

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{

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$MsgArray[$msgC] = $msgSize;

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}

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}

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return $MsgArray;

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}

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function get ($msgNum) {

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// Retrieve the specified msg number. Returns an array

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// where each line of the msg is an array element.

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if(!isset($this->FP))

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{

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$this->ERROR = "POP3 get: " . _("No connection to server");

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return false;

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}

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$this->update_timer();

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$fp = $this->FP;

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$buffer = $this->BUFFER;

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$cmd = "RETR $msgNum";

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$reply = $this->send_cmd($cmd);

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[363] Fix | Delete

if(!$this->is_ok($reply))

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{

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$this->ERROR = "POP3 get: " . _("Error ") . "[$reply]";

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return false;

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}

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$count = 0;

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$MsgArray = array();

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$line = fgets($fp,$buffer);

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while ( !preg_match('/^\.\r\n/',$line))

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{

[375] Fix | Delete

if ( $line[0] == '.' ) { $line = substr($line,1); }

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$MsgArray[$count] = $line;

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$count++;

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$line = fgets($fp,$buffer);

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if(empty($line)) { break; }

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}

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return $MsgArray;

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}

[383] Fix | Delete

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function last ( $type = "count" ) {

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// Returns the highest msg number in the mailbox.

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// returns -1 on error, 0+ on success, if type != count

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// results in a popstat() call (2 element array returned)

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$last = -1;

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if(!isset($this->FP))

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{

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$this->ERROR = "POP3 last: " . _("No connection to server");

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return $last;

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}

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$reply = $this->send_cmd("STAT");

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if(!$this->is_ok($reply))

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{

[399] Fix | Delete

$this->ERROR = "POP3 last: " . _("Error ") . "[$reply]";

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return $last;

[401] Fix | Delete

}

[402] Fix | Delete

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$Vars = preg_split('/\s+/',$reply);

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$count = $Vars[1];

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$size = $Vars[2];

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settype($count,"integer");

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settype($size,"integer");

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if($type != "count")

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{

[410] Fix | Delete

return array($count,$size);

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}

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return $count;

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}

[414] Fix | Delete

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function reset () {

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// Resets the status of the remote server. This includes

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// resetting the status of ALL msgs to not be deleted.

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// This method automatically closes the connection to the server.

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if(!isset($this->FP))

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{

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$this->ERROR = "POP3 reset: " . _("No connection to server");

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return false;

[424] Fix | Delete

}

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$reply = $this->send_cmd("RSET");

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if(!$this->is_ok($reply))

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{

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// The POP3 RSET command -never- gives a -ERR

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// response - if it ever does, something truly

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// wild is going on.

[431] Fix | Delete

[432] Fix | Delete

$this->ERROR = "POP3 reset: " . _("Error ") . "[$reply]";

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@error_log("POP3 reset: ERROR [$reply]",0);

[434] Fix | Delete

}

[435] Fix | Delete

$this->quit();

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return true;

[437] Fix | Delete

}

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function send_cmd ( $cmd = "" )

[440] Fix | Delete

{

[441] Fix | Delete

// Sends a user defined command string to the

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// POP server and returns the results. Useful for

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// non-compliant or custom POP servers.

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// Do NOT includ the \r\n as part of your command

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// string - it will be appended automatically.

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// The return value is a standard fgets() call, which

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// will read up to $this->BUFFER bytes of data, until it

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// encounters a new line, or EOF, whichever happens first.

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[451] Fix | Delete

// This method works best if $cmd responds with only

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// one line of data.

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[454] Fix | Delete

if(!isset($this->FP))

[455] Fix | Delete

{

[456] Fix | Delete

$this->ERROR = "POP3 send_cmd: " . _("No connection to server");

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return false;

[458] Fix | Delete

}

[459] Fix | Delete

[460] Fix | Delete

if(empty($cmd))

[461] Fix | Delete

{

[462] Fix | Delete

$this->ERROR = "POP3 send_cmd: " . _("Empty command string");

[463] Fix | Delete

return "";

[464] Fix | Delete

}

[465] Fix | Delete

[466] Fix | Delete

$fp = $this->FP;

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$buffer = $this->BUFFER;

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$this->update_timer();

[469] Fix | Delete

fwrite($fp,"$cmd\r\n");

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$reply = fgets($fp,$buffer);

[471] Fix | Delete

$reply = $this->strip_clf($reply);

[472] Fix | Delete

if($this->DEBUG) { @error_log("POP3 SEND [$cmd] GOT [$reply]",0); }

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return $reply;

[474] Fix | Delete

}

[475] Fix | Delete

[476] Fix | Delete

function quit() {

[477] Fix | Delete

// Closes the connection to the POP3 server, deleting

[478] Fix | Delete

// any msgs marked as deleted.

[479] Fix | Delete

[480] Fix | Delete

if(!isset($this->FP))

[481] Fix | Delete

{

[482] Fix | Delete

$this->ERROR = "POP3 quit: " . _("connection does not exist");

[483] Fix | Delete

return false;

[484] Fix | Delete

}

[485] Fix | Delete

$fp = $this->FP;

[486] Fix | Delete

$cmd = "QUIT";

[487] Fix | Delete

fwrite($fp,"$cmd\r\n");

[488] Fix | Delete

$reply = fgets($fp,$this->BUFFER);

[489] Fix | Delete

$reply = $this->strip_clf($reply);

[490] Fix | Delete

if($this->DEBUG) { @error_log("POP3 SEND [$cmd] GOT [$reply]",0); }

[491] Fix | Delete

fclose($fp);

[492] Fix | Delete

unset($this->FP);

[493] Fix | Delete

return true;

[494] Fix | Delete

}

[495] Fix | Delete

[496] Fix | Delete

function popstat () {

[497] Fix | Delete

// Returns an array of 2 elements. The number of undeleted

[498] Fix | Delete

// msgs in the mailbox, and the size of the mbox in octets.

[499] Fix | Delete