phpMailer中文说明[转]

A开头：

$AltBody--属性
出自：PHPMailer::$AltBody
文件：class.phpmailer.php
说明：该属性的设置是在邮件正文不支持HTML的备用显示

AddAddress--方法
出自：PHPMailer::AddAddress()，文件：class.phpmailer.php
说明：增加收件人。参数1为收件人邮箱，参数2为收件人称呼。例AddAddress("xiaoxiaoxiaoyu@xiaoxiaoyu.cn","xiaoxiaoyu")，但参数2可选，AddAddress(xiaoxiaoxiaoyu@xiaoxiaoyu.cn)也是可以的。
函数原型：public function AddAddress($address, $name = '') {}

AddAttachment--方法
出自：PHPMailer::AddAttachment()
文件：class.phpmailer.php。
说明：增加附件。
参数：路径，名称，编码，类型。其中，路径为必选，其他为可选
函数原型：
AddAttachment($path, $name = '', $encoding = 'base64', $type = 'application/octet-stream'){}

AddBCC--方法
出自：PHPMailer::AddBCC()
文件：class.phpmailer.php
说明：增加一个密送。抄送和密送的区别请看[SMTP发件中的密送和抄送的区别] 。
参数1为地址，参数2为名称。注意此方法只支持在win32下使用SMTP，不支持mail函数
函数原型：public function AddBCC($address, $name = ''){}

AddCC --方法
出自：PHPMailer::AddCC()
文件：class.phpmailer.php
说明：增加一个抄送。抄送和密送的区别请看[SMTP发件中的密送和抄送的区别] 。
参数1为地址，参数2为名称注意此方法只支持在win32下使用SMTP，不支持mail函数
函数原型：public function AddCC($address, $name = '') {}

AddCustomHeader--方法
出自：PHPMailer::AddCustomHeader()
文件：class.phpmailer.php
说明：增加一个自定义的E-mail头部。
参数为头部信息
函数原型：public function AddCustomHeader($custom_header){}

AddEmbeddedImage --方法
出自：PHPMailer::AddEmbeddedImage()
文件：class.phpmailer.php
说明：增加一个嵌入式图片
参数：路径,返回句柄[,名称,编码,类型]
函数原型：public function AddEmbeddedImage($path, $cid, $name = '', $encoding = 'base64', $type = 'application/octet-stream') {}
提示：AddEmbeddedImage(PICTURE_PATH. "index_01.jpg ", "img_01 ", "index_01.jpg ");
在html中引用<img src= "cid:img_01 ">

AddReplyTo--方法
出自：PHPMailer:: AddReplyTo()
文件：class.phpmailer.php
说明：增加回复标签，如"Reply-to"
参数1地址，参数2名称
函数原型：public function AddReplyTo($address, $name = '') {}

AddStringAttachment-方法
出自：PHPMailer:: AddStringAttachment()
文件：class.phpmailer.php
说明：增加一个字符串或二进制附件（Adds a string or binary attachment (non-filesystem) to the list.?）
参数：字符串,文件名[,编码,类型]
函数原型：public function AddStringAttachment($string, $filename, $encoding = 'base64', $type = 'application/octet-stream') {}

Authenticate--方法
出自：SMTP::Authenticate()
文件：class.smtp.php
说明：开始SMTP认证，必须在Hello()之后调用，如果认证成功，返回true，
参数1用户名，参数2密码
函数原型：public function Authenticate($username, $password) {}

B开头

$Body--属性
出自：PHPMailer::$Body
文件： class.phpmailer.php
说明：邮件内容,HTML或Text格式

C开头

$CharSet--属性
出自：PHPMailer::$CharSet
文件：class.phpmailer.php
说明：邮件编码,默认为iso-8859-1

$ConfirmReadingTo--属性
出自：PHPMailer::$ConfirmReadingTo 文件class.phpmailer.php
说明：回执？

$ContentType--属性
出自：PHPMailer::$ContentType
文件： class.phpmailer.php
说明:文档的类型，默认为"text/plain"

$CRLF--属性
出自：PHPMailer::$ContentType
文件：class.phpmailer.php
说明:SMTP回复结束的分隔符（SMTP reply line ending？）

class.phpmailer.php--对象
出自：class.phpmailer.php
文件： class.phpmailer.php
说明：phpmailer对象

class.smtp.php--对象
出自：class.smtp.php 文件: class.smtp.php
说明:SMTP功能的对象

ClearAddresses--方法
出自：PHPMailer::ClearAddresses()
文件： class.phpmailer.php
说明：清除收件人，为下一次发件做准备。返回类型是void

ClearAllRecipients--方法
出自：PHPMailer::ClearAllRecipients()
文件： class.phpmailer.php
说明：清除所有收件人，包括CC(抄送)和BCC(密送)

ClearAttachments--方法
出自：PHPMailer::ClearAttachments()
文件： class.phpmailer.php
说明：清楚附件

ClearBCCs--方法
出自：PHPMailer::ClearBCCs() 文件 class.phpmailer.php
说明：清楚BCC (密送)

ClearCustomHeaders--方法
出自：PHPMailer::ClearCustomHeaders()
文件： class.phpmailer.php
说明：清楚自定义头部

ClearReplyTos--方法
出自：PHPMailer::ClearReplyTos()
文件： class.phpmailer.php
说明：清楚回复人

Close--方法
出自：SMTP::Close()
文件： class.smtp.php
说明：关闭一个SMTP连接

Connect--方法
出自：SMTP::Connect()
文件： class.smtp.php
说明：建立一个SMTP连接[/color]Mailer.html

$ContentType--属性
出自：PHPMailer::$ContentType
文件： class.phpmailer.php
说明:文档的类型，默认为"text/plain"

D开头
$do_debug--属性
出自：SMTP::$do_debug
文件：class.smtp.php
说明：SMTP调试输出

Data-方法
出自：SMTP::Data()
文件：class.smtp.php
说明：向服务器发送一个数据命令和消息信息（sendsthemsg_datatotheserver）

E开头

$Encoding--属性
出自：PHPMailer::$Encoding
文件：class.phpmailer.php
说明：设置邮件的编码方式，可选："8bit","7bit","binary","base64",和"quoted-printable".

$ErrorInfo--属性
出自：PHPMailer::$ErrorInfo
文件：class.phpmailer.php
说明：返回邮件SMTP中的最后一个错误信息

Expand--方法
出自：SMTP::Expand()
文件：class.smtp.php
说明：返回邮件列表中所有用户。成功则返回数组，否则返回false(Expandtakesthenameandaskstheservertolistallthepeoplewhoaremembersofthe_list_.Expandwillreturnbackandarrayoftheresultorfalseifanerroroccurs.)

F开头:

$From--属性
出自：PHPMailer::$From文件class.phpmailer.php
说明：发件人E-mail地址
$FromName--属性
出自：PHPMailer::$FromName
文件：class.phpmailer.php
说明：发件人称呼

H开头：

$Helo--属性
出自：PHPMailer::$Helo
文件：class.phpmailer.php
说明：设置SMTPHelo,默认是$Hostname(SetstheSMTPHELOofthemessage(Defaultis$Hostname).)

$Host--属性
出自：PHPMailer::$Host
文件：class.phpmailer.php
说明：设置SMTP服务器，格式为：主机名[端口号]，如smtp1.example.com:25和smtp2.example.com都是合法的

$Hostname--属性
出自：PHPMailer::$Hostname
文件：class.phpmailer.php
说明：设置在Message-Id和andReceivedheaders中的hostname并同时被$Helo使用。如果为空，默认为SERVER_NAME或'localhost.localdomain"

Hello--方法
出自：SMTP::Hello()
文件：class.smtp.php
说明：向SMTP服务器发送HELO命令

Help--方法
出自：SMTP::Help()
文件：class.smtp.php
说明：如果有关键词，得到关键词的帮助信息

I开头：

IsError--方法
出自：PHPMailer::IsError()
文件：class.phpmailer.php
说明：返回是否有错误发生

IsHTML--方法
出自：PHPMailer::IsHTML()
文件：class.phpmailer.php
说明：设置信件是否是HTML格式

IsMail--方法
出自:PHPMailer::IsMail()
文件：class.phpmailer.php
说明：设置是否使用php的mail函数发件

IsQmail--方法
出自:PHPMailer::IsQmail()
文件：class.phpmailer.php
说明：设置是否使用qmailMTA来发件

IsSendmail--方法
出自：PHPMailer::IsSendmail()
文件：class.phpmailer.php
说明：是否使用$Sendmail程序来发件

IsSMTP--方法
出自：PHPMailer::IsSMTP()
文件：class.phpmailer.php
说明：是否使用SMTP来发件

M开头：

$Mailer--属性
出自：PHPMailer::$Mailer
文件：class.phpmailer.php
说明:发件方式，("mail","sendmail",or"smtp").中的一个

Mail--方法
出自：SMTP::Mail()
文件：class.smtp.php
说明：从$from中一个邮件地址开始处理，返回true或false。如果是true，则开始发件

N开头：

Noop--方法
出自：SMTP::Noop()
文件：class.smtp.php
说明：向SMTP服务器发送一个NOOP命令

P开头：
$Password--属性
出自：PHPMailer::$Password
文件：class.phpmailer.php
说明：设置SMTP的密码

$PluginDir--属性
出自：PHPMailer::$PluginDir
文件：class.phpmailer.php
说明：设置phpmailer的插件目录，仅在smtpclass不在phpmailer目录下有效

$Port--属性
出自：PHPMailer::$Port
文件：class.phpmailer.php
说明：设置SMTP的端口号

$Priority--属性
出自：PHPMailer::$Priority
文件：class.phpmailer.php
说明：设置邮件投递优先等级。1=紧急,3=普通,5=不急

PHPMailer--对象
出自：PHPMailer
文件：class.phpmailer.php
说明：PHPMailer-PHPemailtransportclass

Q开头

Quit--方法
出自：SMTP::Quit()
文件：class.smtp.php
说明：向服务器发送Quit命令，如果没有错误发生。那么关闭sock，不然$close_on_error为true

R开头

Recipient--方法
出自：SMTP::Recipient()
文件：class.smtp.php
说明：使用To向SMTP发送RCPT命令，参数为:$to

Reset--方法
出自：SMTP::Reset()
文件：class.smtp.php
说明：发送RSET命令从而取消处理中传输。成功则返回true，否则为false

S开头：

$Sender--属性
出自：PHPMailer::$Sender
文件：class.phpmailer.php
说明：SetstheSenderemail(Return-Path)ofthemessage.Ifnotempty,willbesentvia-ftosendmailoras'MAILFROM'insmtpmode.

$Sendmail--属性
出自：PHPMailer::$Sendmail
文件：class.phpmailer.php
说明：设置发件程序的目录

$SMTPAuth--属性
出自：PHPMailer::$SMTPAuth
文件：class.phpmailer.php
说明：设置SMTP是否需要认证，使用Username和Password变量

$SMTPDebug--属性
出自：PHPMailer::$SMTPDebug
文件：class.phpmailer.php
说明：设置SMTP是否调试输出？

$SMTPKeepAlive--属性
出自：PHPMailer::$SMTPKeepAlive
文件：class.phpmailer.php
说明：在每次发件后不关闭连接。如果为true，则，必须使用SmtpClose()来关闭连接

$SMTP_PORT--属性
出自：SMTP::$SMTP_PORT
文件：class.smtp.php
说明：设置SMTP端口

$Subject--属性
出自：PHPMailer::$Subject
文件：class.phpmailer.php
说明：设置信件的主题

Send--方法
出自：SMTP::Send()
文件：class.smtp.php
说明：从指定的邮件地址开始一个邮件传输

Send--方法
出自：PHPMailer::Send()
文件：class.phpmailer.php
说明：创建邮件并制定发件程序。如果发件不成功，则返回false，请使用ErrorInfo来查看错误信息

SendAndMail--方法
出自：SMTP::SendAndMail()
文件：class.smtp.php
说明：从指定的邮件地址开始一个邮件传输

SendOrMail--方法
出自：SMTP::SendOrMail()
文件：class.smtp.php
说明：从指定的邮件地址开始一个邮件传输

SetLanguage--方法
出自：PHPMailer::SetLanguage()
文件：class.phpmailer.php
说明：设置phpmailer错误信息的语言类型，如果无法加载语言文件，则返回false，默认为english

SMTP--方法
出自：SMTP::SMTP()
文件：class.smtp.php
说明：初始化一个对象以便数据处于一个已知的状态

SMTP--对象
出自：SMTP
文件：class.smtp.php
说明：SMTP对象

SmtpClose--方法
出自：PHPMailer::SmtpClose()
文件：class.phpmailer.php
说明：如果有活动的SMTP则关闭它。

T开头

$Timeout--属性
出自：PHPMailer::$Timeout
文件：class.phpmailer.php
说明：设置SMTP服务器的超时(单位：秒)。注意：在win32下，该属性无效

Turn--方法
出自：SMTP::Turn()
文件：class.smtp.php
说明：这是一个可选的SMTP参数，目前phpmailer并不支持他，可能未来支持

U开头

$Username--属性
出自：PHPMailer::$Username
文件：class.phpmailer.php
说明：设置SMTP用户名

V开头

$Version--属性
出自：PHPMailer::$Version
文件：class.phpmailer.php
说明：返回Phpmailer的版本

Verify--方法
出自：SMTP::Verify()
文件：class.smtp.php
说明：通过服务器检查用户名是否经过验证

W开头：

$WordWrap--属性
出自：PHPMailer::$WordWrap
文件：class.phpmailer.php
说明：设置每行最大字符数，超过改数后自动换行

class.phpmailer.php文件

<?php
/*~ class.phpmailer.php      说明：phpmailer对象
.---------------------------------------------------------------------------.
|  Software: PHPMailer - PHP email class                                    |
|   Version: 2.0.4                                                          |
|   Contact: via sourceforge.net support pages (also www.codeworxtech.com)  |
|      Info: http://phpmailer.sourceforge.net                               |
|   Support: http://sourceforge.net/projects/phpmailer/                     |
| ------------------------------------------------------------------------- |
|    Author: Andy Prevost (project admininistrator)                         |
|    Author: Brent R. Matzelle (original founder)                           |
| Copyright (c) 2004-2007, Andy Prevost. All Rights Reserved.               |
| Copyright (c) 2001-2003, Brent R. Matzelle                                |
| ------------------------------------------------------------------------- |
|   License: Distributed under the Lesser General Public License (LGPL)     |
|            http://www.gnu.org/copyleft/lesser.html                        |
| This program is distributed in the hope that it will be useful - WITHOUT  |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or     |
| FITNESS FOR A PARTICULAR PURPOSE.                                         |
| ------------------------------------------------------------------------- |
| We offer a number of paid services (www.codeworxtech.com):                |
| - Web Hosting on highly optimized fast and secure servers                 |
| - Technology Consulting                                                   |
| - Oursourcing (highly qualified programmers and graphic designers)        |
'---------------------------------------------------------------------------'

/**
 * PHPMailer - PHP email transport class
 * @package PHPMailer
 * @author Andy Prevost
 * @copyright 2004 - 2009 Andy Prevost
 */

class PHPMailer {

  /////////////////////////////////////////////////
  // PROPERTIES, PUBLIC
  /////////////////////////////////////////////////

  /**
   * Email priority (1 = High, 3 = Normal, 5 = low).
   * @var int
   * 说明：设置邮件投递优先等级。1=紧急,3=普通,5=不急
   */
  var $Priority          = 3;

  /**
   * Sets the CharSet of the message.
   * @var string
   * 说明：邮件编码,默认为iso-8859-1
   */
  var $CharSet           = 'iso-8859-1';

  /**
   * Sets the Content-type of the message.
   * @var string
   * 说明:文档的类型，默认为"text/plain"
   */
  var $ContentType        = 'text/plain';

  /**
   * Sets the Encoding of the message. Options for this are "8bit",
   * "7bit", "binary", "base64", and "quoted-printable".
   * @var string
   * 说明：设置邮件的编码方式，可选："8bit","7bit","binary","base64",和"quoted-printable".
   */
  var $Encoding          = '8bit';

  /**
   * Holds the most recent mailer error message.
   * @var string
   * 说明：返回邮件SMTP中的最后一个错误信息
   */
  var $ErrorInfo         = '';

  /**
   * Sets the From email address for the message.
   * @var string
   * 说明：发件人E-mail地址
   */
  var $From              = 'root@localhost';

  /**
   * Sets the From name of the message.
   * @var string
   * 说明：发件人称呼
   */
  var $FromName          = 'Root User';

  /**
   * Sets the Sender email (Return-Path) of the message.  If not empty,
   * will be sent via -f to sendmail or as 'MAIL FROM' in smtp mode.
   * @var string
   * 说明：SetstheSenderemail(Return-Path)ofthemessage.Ifnotempty,willbesentvia-ftosendmailoras'MAILFROM'insmtpmode.
   */
  var $Sender            = '';

  /**
   * Sets the Subject of the message.
   * @var string
   * 说明：设置信件的主题
   */
  var $Subject           = '';

  /**
   * Sets the Body of the message.  This can be either an HTML or text body.
   * If HTML then run IsHTML(true).
   * @var string
   * 说明：邮件内容,HTML或Text格式
   */
  var $Body              = '';

  /**
   * Sets the text-only body of the message.  This automatically sets the
   * email to multipart/alternative.  This body can be read by mail
   * clients that do not have HTML email capability such as mutt. Clients
   * that can read HTML will view the normal Body.
   * @var string
   * 该属性的设置是在邮件正文不支持HTML的备用显示
   */
  var $AltBody           = '';

  /**
   * Sets word wrapping on the body of the message to a given number of
   * characters.
   * @var int
   * 说明：设置每行最大字符数，超过改数后自动换行
   */
  var $WordWrap          = 0;

  /**
   * Method to send mail: ("mail", "sendmail", or "smtp").
   * @var string
   * 说明:发件方式，("mail","sendmail",or"smtp").中的一个
   */
  var $Mailer            = 'mail';

  /**
   * Sets the path of the sendmail program.
   * @var string
   * 说明：设置发件程序的目录
   */
  var $Sendmail          = '/usr/sbin/sendmail';

  /**
   * Path to PHPMailer plugins.  This is now only useful if the SMTP class
   * is in a different directory than the PHP include path.
   * @var string
   * 说明：设置phpmailer的插件目录，仅在smtpclass不在phpmailer目录下有效
   */
  var $PluginDir         = '';

  /**
   * Holds PHPMailer version.
   * @var string
   * 说明：返回Phpmailer的版本
   */
  var $Version           = "2.0.4";

  /**
   * Sets the email address that a reading confirmation will be sent.
   * @var string
   * 回执?
   */
  var $ConfirmReadingTo  = '';

  /**
   * Sets the hostname to use in Message-Id and Received headers
   * and as default HELO string. If empty, the value returned
   * by SERVER_NAME is used or 'localhost.localdomain'.
   * @var string
   * 说明：设置在Message-Id和andReceivedheaders中的hostname并同时被$Helo使用。如果为空，默认为SERVER_NAME或'localhost.localdomain"
   */
  var $Hostname          = '';

  /**
   * Sets the message ID to be used in the Message-Id header.
   * If empty, a unique id will be generated.
   * @var string
   */
  var $MessageID         = '';

  /////////////////////////////////////////////////
  // PROPERTIES FOR SMTP
  /////////////////////////////////////////////////

  /**
   * Sets the SMTP hosts.  All hosts must be separated by a
   * semicolon.  You can also specify a different port
   * for each host by using this format: [hostname:port]
   * (e.g. "smtp1.example.com:25;smtp2.example.com").
   * Hosts will be tried in order.
   * @var string
   * 说明：设置SMTP服务器，格式为：主机名[端口号]，如smtp1.example.com:25和smtp2.example.com都是合法的
   */
  var $Host        = 'localhost';

  /**
   * Sets the default SMTP server port.
   * @var int
   * 说明：设置SMTP的端口号
   */
  var $Port        = 25;

  /**
   * Sets the SMTP HELO of the message (Default is $Hostname).
   * @var string
   * 说明：设置SMTPHelo,默认是$Hostname(SetstheSMTPHELOofthemessage(Defaultis$Hostname).)
   */
  var $Helo        = '';

  /**
   * Sets connection prefix.
   * Options are "", "ssl" or "tls"
   * @var string
   */
  var $SMTPSecure = "";

  /**
   * Sets SMTP authentication. Utilizes the Username and Password variables.
   * @var bool
   * 说明：设置SMTP是否需要认证，使用Username和Password变量
   */
  var $SMTPAuth     = false;

  /**
   * Sets SMTP username.
   * @var string
   * 说明：设置SMTP用户名
   */
  var $Username     = '';

  /**
   * Sets SMTP password.
   * @var string
   * 说明：设置SMTP的密码
   */
  var $Password     = '';

  /**
   * Sets the SMTP server timeout in seconds. This function will not
   * work with the win32 version.
   * @var int
   * 说明：设置SMTP服务器的超时(单位：秒)。注意：在win32下，该属性无效
   */
  var $Timeout      = 10;

  /**
   * Sets SMTP class debugging on or off.
   * @var bool
   * 说明：设置SMTP是否调试输出？
   */
  var $SMTPDebug    = false;

  /**
   * Prevents the SMTP connection from being closed after each mail
   * sending.  If this is set to true then to close the connection
   * requires an explicit call to SmtpClose().
   * @var bool
   * 说明：在每次发件后不关闭连接。如果为true，则，必须使用SmtpClose()来关闭连接
   */
  var $SMTPKeepAlive = false;

  /**
   * Provides the ability to have the TO field process individual
   * emails, instead of sending to entire TO addresses
   * @var bool
   */
  var $SingleTo = false;

  /////////////////////////////////////////////////
  // PROPERTIES, PRIVATE
  /////////////////////////////////////////////////

  var $smtp            = NULL;
  var $to              = array();
  var $cc              = array();
  var $bcc             = array();
  var $ReplyTo         = array();
  var $attachment      = array();
  var $CustomHeader    = array();
  var $message_type    = '';
  var $boundary        = array();
  var $language        = array();
  var $error_count     = 0;
  var $LE              = "/n";
  var $sign_cert_file  = "";
  var $sign_key_file   = "";
  var $sign_key_pass   = "";

  /////////////////////////////////////////////////
  // METHODS, VARIABLES
  /////////////////////////////////////////////////

  /**
   * Sets message type to HTML.
   * @param bool $bool
   * @return void
   * 说明：设置信件是否是HTML格式
   */
  function IsHTML($bool) {
    if($bool == true) {
      $this->ContentType = 'text/html';
    } else {
      $this->ContentType = 'text/plain';
    }
  }

  /**
   * Sets Mailer to send message using SMTP.
   * @return void
   * 说明：是否使用SMTP来发件
   */
  function IsSMTP() {
    $this->Mailer = 'smtp';
  }

  /**
   * Sets Mailer to send message using PHP mail() function.
   * @return void
   * 说明：设置是否使用php的mail函数发件
   */
  function IsMail() {
    $this->Mailer = 'mail';
  }

  /**
   * Sets Mailer to send message using the $Sendmail program.
   * @return void
   * 说明：是否使用$Sendmail程序来发件
   */
  function IsSendmail() {
    $this->Mailer = 'sendmail';
  }

  /**
   * Sets Mailer to send message using the qmail MTA.
   * @return void
   * 说明：设置是否使用qmailMTA来发件
   */
  function IsQmail() {
    $this->Sendmail = '/var/qmail/bin/sendmail';
    $this->Mailer = 'sendmail';
  }

  /////////////////////////////////////////////////
  // METHODS, RECIPIENTS
  /////////////////////////////////////////////////

  /**
   * Adds a "To" address.
   * @param string $address
   * @param string $name
   * @return void
   * 增加收件人。参数1为收件人邮箱，参数2为收件人称呼。
   * 例AddAddress("xiaoxiaoxiaoyu@xiaoxiaoyu.cn","xiaoxiaoyu")，但参数2可选，AddAddress(xiaoxiaoxiaoyu@xiaoxiaoyu.cn)也是可以的。
   */
  function AddAddress($address, $name = '') {
    $cur = count($this->to);
    $this->to[$cur][0] = trim($address);
    $this->to[$cur][1] = $name;
  }

  /**
   * Adds a "Cc" address. Note: this function works
   * with the SMTP mailer on win32, not with the "mail"
   * mailer.
   * @param string $address
   * @param string $name
   * @return void
   * 增加一个抄送。
   * 参数1为地址，参数2为名称注意此方法只支持在win32下使用SMTP，不支持mail函数
   */
  function AddCC($address, $name = '') {
    $cur = count($this->cc);
    $this->cc[$cur][0] = trim($address);
    $this->cc[$cur][1] = $name;
  }

  /**
   * Adds a "Bcc" address. Note: this function works
   * with the SMTP mailer on win32, not with the "mail"
   * mailer.
   * @param string $address
   * @param string $name
   * @return void
   * 增加一个密送。
   * 参数1为地址，参数2为名称。注意此方法只支持在win32下使用SMTP，不支持mail函数
   */
  function AddBCC($address, $name = '') {
    $cur = count($this->bcc);
    $this->bcc[$cur][0] = trim($address);
    $this->bcc[$cur][1] = $name;
  }

  /**
   * Adds a "Reply-To" address.
   * @param string $address
   * @param string $name
   * @return void
   * 说明：增加回复标签，如"Reply-to"
   * 参数1地址，参数2名称
   */
  function AddReplyTo($address, $name = '') {
    $cur = count($this->ReplyTo);
    $this->ReplyTo[$cur][0] = trim($address);
    $this->ReplyTo[$cur][1] = $name;
  }

  /////////////////////////////////////////////////
  // METHODS, MAIL SENDING
  /////////////////////////////////////////////////

  /**
   * Creates message and assigns Mailer. If the message is
   * not sent successfully then it returns false.  Use the ErrorInfo
   * variable to view description of the error.
   * @return bool
   * 说明：创建邮件并制定发件程序。如果发件不成功，则返回false，请使用ErrorInfo来查看错误信息
   */
  function Send() {
    $header = '';
    $body = '';
    $result = true;

    if((count($this->to) + count($this->cc) + count($this->bcc)) < 1) {
      $this->SetError($this->Lang('provide_address'));
      return false;
    }

    /* Set whether the message is multipart/alternative */
    if(!empty($this->AltBody)) {
      $this->ContentType = 'multipart/alternative';
    }

    $this->error_count = 0; // reset errors
    $this->SetMessageType();
    $header .= $this->CreateHeader();
    $body = $this->CreateBody();

    if($body == '') {
      return false;
    }

    /* Choose the mailer */
    switch($this->Mailer) {
      case 'sendmail':
        $result = $this->SendmailSend($header, $body);
        break;
      case 'smtp':
        $result = $this->SmtpSend($header, $body);
        break;
      case 'mail':
        $result = $this->MailSend($header, $body);
        break;
      default:
        $result = $this->MailSend($header, $body);
        break;
        //$this->SetError($this->Mailer . $this->Lang('mailer_not_supported'));
        //$result = false;
        //break;
    }

    return $result;
  }

  /**
   * Sends mail using the $Sendmail program.
   * @access private
   * @return bool
   */
  function SendmailSend($header, $body) {
    if ($this->Sender != '') {
      $sendmail = sprintf("%s -oi -f %s -t", escapeshellcmd($this->Sendmail), escapeshellarg($this->Sender));
    } else {
      $sendmail = sprintf("%s -oi -t", escapeshellcmd($this->Sendmail));
    }

    if(!@$mail = popen($sendmail, 'w')) {
      $this->SetError($this->Lang('execute') . $this->Sendmail);
      return false;
    }

    fputs($mail, $header);
    fputs($mail, $body);

    $result = pclose($mail);
    if (version_compare(phpversion(), '4.2.3') == -1) {
      $result = $result >> 8 & 0xFF;
    }
    if($result != 0) {
      $this->SetError($this->Lang('execute') . $this->Sendmail);
      return false;
    }
    return true;
  }

  /**
   * Sends mail using the PHP mail() function.
   * @access private
   * @return bool
   */
  function MailSend($header, $body) {

    $to = '';
    for($i = 0; $i < count($this->to); $i++) {
      if($i != 0) { $to .= ', '; }
      $to .= $this->AddrFormat($this->to[$i]);
    }

    $toArr = split(',', $to);

    $params = sprintf("-oi -f %s", $this->Sender);
    if ($this->Sender != '' && strlen(ini_get('safe_mode')) < 1) {
      $old_from = ini_get('sendmail_from');
      ini_set('sendmail_from', $this->Sender);
      if ($this->SingleTo === true && count($toArr) > 1) {
        foreach ($toArr as $key => $val) {
          $rt = @mail($val, $this->EncodeHeader($this->SecureHeader($this->Subject)), $body, $header, $params);
        }
      } else {
        $rt = @mail($to, $this->EncodeHeader($this->SecureHeader($this->Subject)), $body, $header, $params);
      }
    } else {
      if ($this->SingleTo === true && count($toArr) > 1) {
        foreach ($toArr as $key => $val) {
          $rt = @mail($val, $this->EncodeHeader($this->SecureHeader($this->Subject)), $body, $header, $params);
        }
      } else {
        $rt = @mail($to, $this->EncodeHeader($this->SecureHeader($this->Subject)), $body, $header);
      }
    }

    if (isset($old_from)) {
      ini_set('sendmail_from', $old_from);
    }

    if(!$rt) {
      $this->SetError($this->Lang('instantiate'));
      return false;
    }

    return true;
  }

  /**
   * Sends mail via SMTP using PhpSMTP (Author:
   * Chris Ryan).  Returns bool.  Returns false if there is a
   * bad MAIL FROM, RCPT, or DATA input.
   * @access private
   * @return bool
   */
  function SmtpSend($header, $body) {
    include_once($this->PluginDir . 'class.smtp.php');
    $error = '';
    $bad_rcpt = array();

    if(!$this->SmtpConnect()) {
      return false;
    }

    $smtp_from = ($this->Sender == '') ? $this->From : $this->Sender;
    if(!$this->smtp->Mail($smtp_from)) {
      $error = $this->Lang('from_failed') . $smtp_from;
      $this->SetError($error);
      $this->smtp->Reset();
      return false;
    }

    /* Attempt to send attach all recipients */
    for($i = 0; $i < count($this->to); $i++) {
      if(!$this->smtp->Recipient($this->to[$i][0])) {
        $bad_rcpt[] = $this->to[$i][0];
      }
    }
    for($i = 0; $i < count($this->cc); $i++) {
      if(!$this->smtp->Recipient($this->cc[$i][0])) {
        $bad_rcpt[] = $this->cc[$i][0];
      }
    }
    for($i = 0; $i < count($this->bcc); $i++) {
      if(!$this->smtp->Recipient($this->bcc[$i][0])) {
        $bad_rcpt[] = $this->bcc[$i][0];
      }
    }

    if(count($bad_rcpt) > 0) { // Create error message
      for($i = 0; $i < count($bad_rcpt); $i++) {
        if($i != 0) {
          $error .= ', ';
        }
        $error .= $bad_rcpt[$i];
      }
      $error = $this->Lang('recipients_failed') . $error;
      $this->SetError($error);
      $this->smtp->Reset();
      return false;
    }

    if(!$this->smtp->Data($header . $body)) {
      $this->SetError($this->Lang('data_not_accepted'));
      $this->smtp->Reset();
      return false;
    }
    if($this->SMTPKeepAlive == true) {
      $this->smtp->Reset();
    } else {
      $this->SmtpClose();
    }

    return true;
  }

  /**
   * Initiates a connection to an SMTP server.  Returns false if the
   * operation failed.
   * @access private
   * @return bool
   */
  function SmtpConnect() {
    if($this->smtp == NULL) {
      $this->smtp = new SMTP();
    }

    $this->smtp->do_debug = $this->SMTPDebug;
    $hosts = explode(';', $this->Host);
    $index = 0;
    $connection = ($this->smtp->Connected());

    /* Retry while there is no connection */
    while($index < count($hosts) && $connection == false) {
      $hostinfo = array();
      if(eregi('^(.+):([0-9]+)$', $hosts[$index], $hostinfo)) {
        $host = $hostinfo[1];
        $port = $hostinfo[2];
      } else {
        $host = $hosts[$index];
        $port = $this->Port;
      }

      if($this->smtp->Connect(((!empty($this->SMTPSecure))?$this->SMTPSecure.'://':'').$host, $port, $this->Timeout)) {
        if ($this->Helo != '') {
          $this->smtp->Hello($this->Helo);
        } else {
          $this->smtp->Hello($this->ServerHostname());
        }

        $connection = true;
        if($this->SMTPAuth) {
          if(!$this->smtp->Authenticate($this->Username, $this->Password)) {
            $this->SetError($this->Lang('authenticate'));
            $this->smtp->Reset();
            $connection = false;
          }
        }
      }
      $index++;
    }
    if(!$connection) {
      $this->SetError($this->Lang('connect_host'));
    }

    return $connection;
  }

  /**
   * Closes the active SMTP session if one exists.
   * @return void
   * 说明：如果有活动的SMTP则关闭它。
   */
  function SmtpClose() {
    if($this->smtp != NULL) {
      if($this->smtp->Connected()) {
        $this->smtp->Quit();
        $this->smtp->Close();
      }
    }
  }

  /**
   * Sets the language for all class error messages.  Returns false
   * if it cannot load the language file.  The default language type
   * is English.
   * @param string $lang_type Type of language (e.g. Portuguese: "br")
   * @param string $lang_path Path to the language file directory
   * @access public
   * @return bool
   * 说明：设置phpmailer错误信息的语言类型，如果无法加载语言文件，则返回false，默认为english
   */
  function SetLanguage($lang_type, $lang_path = 'language/') {
    if(file_exists($lang_path.'phpmailer.lang-'.$lang_type.'.php')) {
      include($lang_path.'phpmailer.lang-'.$lang_type.'.php');
    } elseif (file_exists($lang_path.'phpmailer.lang-en.php')) {
      include($lang_path.'phpmailer.lang-en.php');
    } else {
      $PHPMAILER_LANG = array();
      $PHPMAILER_LANG["provide_address"]      = 'You must provide at least one ' .
      $PHPMAILER_LANG["mailer_not_supported"] = ' mailer is not supported.';
      $PHPMAILER_LANG["execute"]              = 'Could not execute: ';
      $PHPMAILER_LANG["instantiate"]          = 'Could not instantiate mail function.';
      $PHPMAILER_LANG["authenticate"]         = 'SMTP Error: Could not authenticate.';
      $PHPMAILER_LANG["from_failed"]          = 'The following From address failed: ';
      $PHPMAILER_LANG["recipients_failed"]    = 'SMTP Error: The following ' .
      $PHPMAILER_LANG["data_not_accepted"]    = 'SMTP Error: Data not accepted.';
      $PHPMAILER_LANG["connect_host"]         = 'SMTP Error: Could not connect to SMTP host.';
      $PHPMAILER_LANG["file_access"]          = 'Could not access file: ';
      $PHPMAILER_LANG["file_open"]            = 'File Error: Could not open file: ';
      $PHPMAILER_LANG["encoding"]             = 'Unknown encoding: ';
      $PHPMAILER_LANG["signing"]              = 'Signing Error: ';
    }
    $this->language = $PHPMAILER_LANG;

    return true;
  }

  /////////////////////////////////////////////////
  // METHODS, MESSAGE CREATION
  /////////////////////////////////////////////////

  /**
   * Creates recipient headers.
   * @access private
   * @return string
   */
  function AddrAppend($type, $addr) {
    $addr_str = $type . ': ';
    $addr_str .= $this->AddrFormat($addr[0]);
    if(count($addr) > 1) {
      for($i = 1; $i < count($addr); $i++) {
        $addr_str .= ', ' . $this->AddrFormat($addr[$i]);
      }
    }
    $addr_str .= $this->LE;

    return $addr_str;
  }

  /**
   * Formats an address correctly.
   * @access private
   * @return string
   */
  function AddrFormat($addr) {
    if(empty($addr[1])) {
      $formatted = $this->SecureHeader($addr[0]);
    } else {
      $formatted = $this->EncodeHeader($this->SecureHeader($addr[1]), 'phrase') . " <" . $this->SecureHeader($addr[0]) . ">";
    }

    return $formatted;
  }

  /**
   * Wraps message for use with mailers that do not
   * automatically perform wrapping and for quoted-printable.
   * Original written by philippe.
   * @access private
   * @return string
   */
  function WrapText($message, $length, $qp_mode = false) {
    $soft_break = ($qp_mode) ? sprintf(" =%s", $this->LE) : $this->LE;
    // If utf-8 encoding is used, we will need to make sure we don't
    // split multibyte characters when we wrap
    $is_utf8 = (strtolower($this->CharSet) == "utf-8");

    $message = $this->FixEOL($message);
    if (substr($message, -1) == $this->LE) {
      $message = substr($message, 0, -1);
    }

    $line = explode($this->LE, $message);
    $message = '';
    for ($i=0 ;$i < count($line); $i++) {
      $line_part = explode(' ', $line[$i]);
      $buf = '';
      for ($e = 0; $e<count($line_part); $e++) {
        $word = $line_part[$e];
        if ($qp_mode and (strlen($word) > $length)) {
          $space_left = $length - strlen($buf) - 1;
          if ($e != 0) {
            if ($space_left > 20) {
              $len = $space_left;
              if ($is_utf8) {
                $len = $this->UTF8CharBoundary($word, $len);
              } elseif (substr($word, $len - 1, 1) == "=") {
                $len--;
              } elseif (substr($word, $len - 2, 1) == "=") {
                $len -= 2;
              }
              $part = substr($word, 0, $len);
              $word = substr($word, $len);
              $buf .= ' ' . $part;
              $message .= $buf . sprintf("=%s", $this->LE);
            } else {
              $message .= $buf . $soft_break;
            }
            $buf = '';
          }
          while (strlen($word) > 0) {
            $len = $length;
            if ($is_utf8) {
              $len = $this->UTF8CharBoundary($word, $len);
            } elseif (substr($word, $len - 1, 1) == "=") {
              $len--;
            } elseif (substr($word, $len - 2, 1) == "=") {
              $len -= 2;
            }
            $part = substr($word, 0, $len);
            $word = substr($word, $len);

            if (strlen($word) > 0) {
              $message .= $part . sprintf("=%s", $this->LE);
            } else {
              $buf = $part;
            }
          }
        } else {
          $buf_o = $buf;
          $buf .= ($e == 0) ? $word : (' ' . $word);

          if (strlen($buf) > $length and $buf_o != '') {
            $message .= $buf_o . $soft_break;
            $buf = $word;
          }
        }
      }
      $message .= $buf . $this->LE;
    }

    return $message;
  }

  /**
   * Finds last character boundary prior to maxLength in a utf-8
   * quoted (printable) encoded string.
   * Original written by Colin Brown.
   * @access private
   * @param string $encodedText utf-8 QP text
   * @param int    $maxLength   find last character boundary prior to this length
   * @return int
   */
  function UTF8CharBoundary($encodedText, $maxLength) {
    $foundSplitPos = false;
    $lookBack = 3;
    while (!$foundSplitPos) {
      $lastChunk = substr($encodedText, $maxLength - $lookBack, $lookBack);
      $encodedCharPos = strpos($lastChunk, "=");
      if ($encodedCharPos !== false) {
        // Found start of encoded character byte within $lookBack block.
        // Check the encoded byte value (the 2 chars after the '=')
        $hex = substr($encodedText, $maxLength - $lookBack + $encodedCharPos + 1, 2);
        $dec = hexdec($hex);
        if ($dec < 128) { // Single byte character.
          // If the encoded char was found at pos 0, it will fit
          // otherwise reduce maxLength to start of the encoded char
          $maxLength = ($encodedCharPos == 0) ? $maxLength :
          $maxLength - ($lookBack - $encodedCharPos);
          $foundSplitPos = true;
        } elseif ($dec >= 192) { // First byte of a multi byte character
          // Reduce maxLength to split at start of character
          $maxLength = $maxLength - ($lookBack - $encodedCharPos);
          $foundSplitPos = true;
        } elseif ($dec < 192) { // Middle byte of a multi byte character, look further back
          $lookBack += 3;
        }
      } else {
        // No encoded character found
        $foundSplitPos = true;
      }
    }
    return $maxLength;
  }

  /**
   * Set the body wrapping.
   * @access private
   * @return void
   */
  function SetWordWrap() {
    if($this->WordWrap < 1) {
      return;
    }

    switch($this->message_type) {
      case 'alt':
        /* fall through */
      case 'alt_attachments':
        $this->AltBody = $this->WrapText($this->AltBody, $this->WordWrap);
        break;
      default:
        $this->Body = $this->WrapText($this->Body, $this->WordWrap);
        break;
    }
  }

  /**
   * Assembles message header.
   * @access private
   * @return string
   */
  function CreateHeader() {
    $result = '';

    /* Set the boundaries */
    $uniq_id = md5(uniqid(time()));
    $this->boundary[1] = 'b1_' . $uniq_id;
    $this->boundary[2] = 'b2_' . $uniq_id;

    $result .= $this->HeaderLine('Date', $this->RFCDate());
    if($this->Sender == '') {
      $result .= $this->HeaderLine('Return-Path', trim($this->From));
    } else {
      $result .= $this->HeaderLine('Return-Path', trim($this->Sender));
    }

    /* To be created automatically by mail() */
    if($this->Mailer != 'mail') {
      if(count($this->to) > 0) {
        $result .= $this->AddrAppend('To', $this->to);
      } elseif (count($this->cc) == 0) {
        $result .= $this->HeaderLine('To', 'undisclosed-recipients:;');
      }
    }

    $from = array();
    $from[0][0] = trim($this->From);
    $from[0][1] = $this->FromName;
    $result .= $this->AddrAppend('From', $from);

    /* sendmail and mail() extract Cc from the header before sending */
    if((($this->Mailer == 'sendmail') || ($this->Mailer == 'mail')) && (count($this->cc) > 0)) {
      $result .= $this->AddrAppend('Cc', $this->cc);
    }

    /* sendmail and mail() extract Bcc from the header before sending */
    if((($this->Mailer == 'sendmail') || ($this->Mailer == 'mail')) && (count($this->bcc) > 0)) {
      $result .= $this->AddrAppend('Bcc', $this->bcc);
    }

    if(count($this->ReplyTo) > 0) {
      $result .= $this->AddrAppend('Reply-To', $this->ReplyTo);
    }

    /* mail() sets the subject itself */
    if($this->Mailer != 'mail') {
      $result .= $this->HeaderLine('Subject', $this->EncodeHeader($this->SecureHeader($this->Subject)));
    }

    if($this->MessageID != '') {
      $result .= $this->HeaderLine('Message-ID',$this->MessageID);
    } else {
      $result .= sprintf("Message-ID:

　　

class.smtp.php 文件

<?php
/*~ class.smtp.php    说明:SMTP功能的对象
.---------------------------------------------------------------------------.
|  Software: PHPMailer - PHP email class                                    |
|   Version: 2.0.4                                                          |
|   Contact: via sourceforge.net support pages (also www.codeworxtech.com)  |
|      Info: http://phpmailer.sourceforge.net                               |
|   Support: http://sourceforge.net/projects/phpmailer/                     |
| ------------------------------------------------------------------------- |
|    Author: Andy Prevost (project admininistrator)                         |
|    Author: Brent R. Matzelle (original founder)                           |
| Copyright (c) 2004-2007, Andy Prevost. All Rights Reserved.               |
| Copyright (c) 2001-2003, Brent R. Matzelle                                |
| ------------------------------------------------------------------------- |
|   License: Distributed under the Lesser General Public License (LGPL)     |
|            http://www.gnu.org/copyleft/lesser.html                        |
| This program is distributed in the hope that it will be useful - WITHOUT  |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or     |
| FITNESS FOR A PARTICULAR PURPOSE.                                         |
| ------------------------------------------------------------------------- |
| We offer a number of paid services (www.codeworxtech.com):                |
| - Web Hosting on highly optimized fast and secure servers                 |
| - Technology Consulting                                                   |
| - Oursourcing (highly qualified programmers and graphic designers)        |
'---------------------------------------------------------------------------'

/**
 * SMTP is rfc 821 compliant and implements all the rfc 821 SMTP
 * commands except TURN which will always return a not implemented
 * error. SMTP also provides some utility methods for sending mail
 * to an SMTP server.
 * @package PHPMailer
 * @author Chris Ryan
 */

class SMTP
{
  /**
   *  SMTP server port
   *  @var int
   * 说明：设置SMTP端口
   */
  var $SMTP_PORT = 25;

  /**
   *  SMTP reply line ending
   *  @var string
   *  说明:SMTP回复结束的分隔符（SMTP reply line ending？）
   */
  var $CRLF = "/r/n";

  /**
   *  Sets whether debugging is turned on
   *  @var bool
   * 说明：SMTP调试输出
   */
  var $do_debug;       # the level of debug to perform

  /**
   *  Sets VERP use on/off (default is off)
   *  @var bool
   */
  var $do_verp = false;

  /**#@+
   * @access private
   */
  var $smtp_conn;      # the socket to the server
  var $error;          # error if any on the last call
  var $helo_rply;      # the reply the server sent to us for HELO
  /**#@-*/

  /**
   * Initialize the class so that the data is in a known state.
   * @access public
   * @return void
   * 说明：初始化一个对象以便数据处于一个已知的状态
   */
  function SMTP() {
    $this->smtp_conn = 0;
    $this->error = null;
    $this->helo_rply = null;

    $this->do_debug = 0;
  }

  /*************************************************************
   *                    CONNECTION FUNCTIONS                  *
   ***********************************************************/

  /**
   * Connect to the server specified on the port specified.
   * If the port is not specified use the default SMTP_PORT.
   * If tval is specified then a connection will try and be
   * established with the server for that number of seconds.
   * If tval is not specified the default is 30 seconds to
   * try on the connection.
   *
   * SMTP CODE SUCCESS: 220
   * SMTP CODE FAILURE: 421
   * @access public
   * @return bool
   * 说明：建立一个SMTP连接[/color]Mailer.html
   */
  function Connect($host,$port=0,$tval=30) {
    # set the error val to null so there is no confusion
    $this->error = null;

    # make sure we are __not__ connected
    if($this->connected()) {
      # ok we are connected! what should we do?
      # for now we will just give an error saying we
      # are already connected
      $this->error = array("error" => "Already connected to a server");
      return false;
    }

    if(empty($port)) {
      $port = $this->SMTP_PORT;
    }

    #connect to the smtp server
    $this->smtp_conn = fsockopen($host,    # the host of the server
                                 $port,    # the port to use
                                 $errno,   # error number if any
                                 $errstr,  # error message if any
                                 $tval);   # give up after ? secs
    # verify we connected properly
    if(empty($this->smtp_conn)) {
      $this->error = array("error" => "Failed to connect to server",
                           "errno" => $errno,
                           "errstr" => $errstr);
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": $errstr ($errno)" . $this->CRLF;
      }
      return false;
    }

    # sometimes the SMTP server takes a little longer to respond
    # so we will give it a longer timeout for the first read
    // Windows still does not have support for this timeout function
    if(substr(PHP_OS, 0, 3) != "WIN")
     socket_set_timeout($this->smtp_conn, $tval, 0);

    # get any announcement stuff
    $announce = $this->get_lines();

    # set the timeout  of any socket functions at 1/10 of a second
    //if(function_exists("socket_set_timeout"))
    //   socket_set_timeout($this->smtp_conn, 0, 100000);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $announce;
    }

    return true;
  }

  /**
   * Performs SMTP authentication.  Must be run after running the
   * Hello() method.  Returns true if successfully authenticated.
   * @access public
   * @return bool
   * 说明：开始SMTP认证，必须在Hello()之后调用，如果认证成功，返回true，
   * 参数1用户名，参数2密码
   */
  function Authenticate($username, $password) {
    // Start authentication
    fputs($this->smtp_conn,"AUTH LOGIN" . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($code != 334) {
      $this->error =
        array("error" => "AUTH not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }

    // Send encoded username
    fputs($this->smtp_conn, base64_encode($username) . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($code != 334) {
      $this->error =
        array("error" => "Username not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }

    // Send encoded password
    fputs($this->smtp_conn, base64_encode($password) . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($code != 235) {
      $this->error =
        array("error" => "Password not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }

    return true;
  }

  /**
   * Returns true if connected to a server otherwise false
   * @access private
   * @return bool
   */
  function Connected() {
    if(!empty($this->smtp_conn)) {
      $sock_status = socket_get_status($this->smtp_conn);
      if($sock_status["eof"]) {
        # hmm this is an odd situation... the socket is
        # valid but we are not connected anymore
        if($this->do_debug >= 1) {
            echo "SMTP -> NOTICE:" . $this->CRLF .
                 "EOF caught while checking if connected";
        }
        $this->Close();
        return false;
      }
      return true; # everything looks good
    }
    return false;
  }

  /**
   * Closes the socket and cleans up the state of the class.
   * It is not considered good to use this function without
   * first trying to use QUIT.
   * @access public
   * @return void
   * 说明：关闭一个SMTP连接
   */
  function Close() {
    $this->error = null; # so there is no confusion
    $this->helo_rply = null;
    if(!empty($this->smtp_conn)) {
      # close the connection and cleanup
      fclose($this->smtp_conn);
      $this->smtp_conn = 0;
    }
  }

  /***************************************************************
   *                        SMTP COMMANDS                       *
   *************************************************************/

  /**
   * Issues a data command and sends the msg_data to the server
   * finializing the mail transaction. $msg_data is the message
   * that is to be send with the headers. Each header needs to be
   * on a single line followed by a <CRLF> with the message headers
   * and the message body being seperated by and additional <CRLF>.
   *
   * Implements rfc 821: DATA <CRLF>
   *
   * SMTP CODE INTERMEDIATE: 354
   *     [data]
   *     <CRLF>.<CRLF>
   *     SMTP CODE SUCCESS: 250
   *     SMTP CODE FAILURE: 552,554,451,452
   * SMTP CODE FAILURE: 451,554
   * SMTP CODE ERROR  : 500,501,503,421
   * @access public
   * @return bool
   * 说明：向服务器发送一个数据命令和消息信息（sendsthemsg_datatotheserver）
   */
  function Data($msg_data) {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Data() without being connected");
      return false;
    }

    fputs($this->smtp_conn,"DATA" . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 354) {
      $this->error =
        array("error" => "DATA command not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }

    # the server is ready to accept data!
    # according to rfc 821 we should not send more than 1000
    # including the CRLF
    # characters on a single line so we will break the data up
    # into lines by /r and/or /n then if needed we will break
    # each of those into smaller lines to fit within the limit.
    # in addition we will be looking for lines that start with
    # a period '.' and append and additional period '.' to that
    # line. NOTE: this does not count towards are limit.

    # normalize the line breaks so we know the explode works
    $msg_data = str_replace("/r/n","/n",$msg_data);
    $msg_data = str_replace("/r","/n",$msg_data);
    $lines = explode("/n",$msg_data);

    # we need to find a good way to determine is headers are
    # in the msg_data or if it is a straight msg body
    # currently I am assuming rfc 822 definitions of msg headers
    # and if the first field of the first line (':' sperated)
    # does not contain a space then it _should_ be a header
    # and we can process all lines before a blank "" line as
    # headers.
    $field = substr($lines[0],0,strpos($lines[0],":"));
    $in_headers = false;
    if(!empty($field) && !strstr($field," ")) {
      $in_headers = true;
    }

    $max_line_length = 998; # used below; set here for ease in change

    while(list(,$line) = @each($lines)) {
      $lines_out = null;
      if($line == "" && $in_headers) {
        $in_headers = false;
      }
      # ok we need to break this line up into several
      # smaller lines
      while(strlen($line) > $max_line_length) {
        $pos = strrpos(substr($line,0,$max_line_length)," ");

        # Patch to fix DOS attack
        if(!$pos) {
          $pos = $max_line_length - 1;
        }

        $lines_out[] = substr($line,0,$pos);
        $line = substr($line,$pos + 1);
        # if we are processing headers we need to
        # add a LWSP-char to the front of the new line
        # rfc 822 on long msg headers
        if($in_headers) {
          $line = "/t" . $line;
        }
      }
      $lines_out[] = $line;

      # now send the lines to the server
      while(list(,$line_out) = @each($lines_out)) {
        if(strlen($line_out) > 0)
        {
          if(substr($line_out, 0, 1) == ".") {
            $line_out = "." . $line_out;
          }
        }
        fputs($this->smtp_conn,$line_out . $this->CRLF);
      }
    }

    # ok all the message data has been sent so lets get this
    # over with aleady
    fputs($this->smtp_conn, $this->CRLF . "." . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
        array("error" => "DATA not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }
    return true;
  }

  /**
   * Expand takes the name and asks the server to list all the
   * people who are members of the _list_. Expand will return
   * back and array of the result or false if an error occurs.
   * Each value in the array returned has the format of:
   *     [ <full-name> <sp> ] <path>
   * The definition of <path> is defined in rfc 821
   *
   * Implements rfc 821: EXPN <SP> <string> <CRLF>
   *
   * SMTP CODE SUCCESS: 250
   * SMTP CODE FAILURE: 550
   * SMTP CODE ERROR  : 500,501,502,504,421
   * @access public
   * @return string array
   * 说明：返回邮件列表中所有用户。成功则返回数组，否则返回false(Expandtakesthenameandaskstheservertolistallthepeoplewhoaremembersofthe_list_.Expandwillreturnbackandarrayoftheresultorfalseifanerroroccurs.)
   */
  function Expand($name) {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
            "error" => "Called Expand() without being connected");
      return false;
    }

    fputs($this->smtp_conn,"EXPN " . $name . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
        array("error" => "EXPN not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }

    # parse the reply and place in our array to return to user
    $entries = explode($this->CRLF,$rply);
    while(list(,$l) = @each($entries)) {
      $list[] = substr($l,4);
    }

    return $list;
  }

  /**
   * Sends the HELO command to the smtp server.
   * This makes sure that we and the server are in
   * the same known state.
   *
   * Implements from rfc 821: HELO <SP> <domain> <CRLF>
   *
   * SMTP CODE SUCCESS: 250
   * SMTP CODE ERROR  : 500, 501, 504, 421
   * @access public
   * @return bool
   * 说明：向SMTP服务器发送HELO命令
   */
  function Hello($host="") {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
            "error" => "Called Hello() without being connected");
      return false;
    }

    # if a hostname for the HELO was not specified determine
    # a suitable one to send
    if(empty($host)) {
      # we need to determine some sort of appopiate default
      # to send to the server
      $host = "localhost";
    }

    // Send extended hello first (RFC 2821)
    if(!$this->SendHello("EHLO", $host))
    {
      if(!$this->SendHello("HELO", $host))
          return false;
    }

    return true;
  }

  /**
   * Sends a HELO/EHLO command.
   * @access private
   * @return bool
   */
  function SendHello($hello, $host) {
    fputs($this->smtp_conn, $hello . " " . $host . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER: " . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
        array("error" => $hello . " not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }

    $this->helo_rply = $rply;

    return true;
  }

  /**
   * Gets help information on the keyword specified. If the keyword
   * is not specified then returns generic help, ussually contianing
   * A list of keywords that help is available on. This function
   * returns the results back to the user. It is up to the user to
   * handle the returned data. If an error occurs then false is
   * returned with $this->error set appropiately.
   *
   * Implements rfc 821: HELP [ <SP> <string> ] <CRLF>
   *
   * SMTP CODE SUCCESS: 211,214
   * SMTP CODE ERROR  : 500,501,502,504,421
   * @access public
   * @return string
   * 说明：如果有关键词，得到关键词的帮助信息
   */
  function Help($keyword="") {
    $this->error = null; # to avoid confusion

    if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Help() without being connected");
      return false;
    }

    $extra = "";
    if(!empty($keyword)) {
      $extra = " " . $keyword;
    }

    fputs($this->smtp_conn,"HELP" . $extra . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 211 && $code != 214) {
      $this->error =
        array("error" => "HELP not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }

    return $rply;
  }

  /**
   * Starts a mail transaction from the email address specified in
   * $from. Returns true if successful or false otherwise. If True
   * the mail transaction is started and then one or more Recipient
   * commands may be called followed by a Data command.
   *
   * Implements rfc 821: MAIL <SP> FROM:<reverse-path> <CRLF>
   *
   * SMTP CODE SUCCESS: 250
   * SMTP CODE SUCCESS: 552,451,452
   * SMTP CODE SUCCESS: 500,501,421
   * @access public
   * @return bool
   * 说明：从$from中一个邮件地址开始处理，返回true或false。如果是true，则开始发件
   */
  function Mail($from) {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Mail() without being connected");
      return false;
    }

    $useVerp = ($this->do_verp ? "XVERP" : "");
    fputs($this->smtp_conn,"MAIL FROM:<" . $from . ">" . $useVerp . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
        array("error" => "MAIL not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }
    return true;
  }

  /**
   * Sends the command NOOP to the SMTP server.
   *
   * Implements from rfc 821: NOOP <CRLF>
   *
   * SMTP CODE SUCCESS: 250
   * SMTP CODE ERROR  : 500, 421
   * @access public
   * @return bool
   * 说明：向SMTP服务器发送一个NOOP命令
   */
  function Noop() {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Noop() without being connected");
      return false;
    }

    fputs($this->smtp_conn,"NOOP" . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
        array("error" => "NOOP not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }
    return true;
  }

  /**
   * Sends the quit command to the server and then closes the socket
   * if there is no error or the $close_on_error argument is true.
   *
   * Implements from rfc 821: QUIT <CRLF>
   *
   * SMTP CODE SUCCESS: 221
   * SMTP CODE ERROR  : 500
   * @access public
   * @return bool
   * 说明：向服务器发送Quit命令，如果没有错误发生。那么关闭sock，不然$close_on_error为true
   */
  function Quit($close_on_error=true) {
    $this->error = null; # so there is no confusion

    if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Quit() without being connected");
      return false;
    }

    # send the quit command to the server
    fputs($this->smtp_conn,"quit" . $this->CRLF);

    # get any good-bye messages
    $byemsg = $this->get_lines();

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $byemsg;
    }

    $rval = true;
    $e = null;

    $code = substr($byemsg,0,3);
    if($code != 221) {
      # use e as a tmp var cause Close will overwrite $this->error
      $e = array("error" => "SMTP server rejected quit command",
                 "smtp_code" => $code,
                 "smtp_rply" => substr($byemsg,4));
      $rval = false;
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $e["error"] . ": " .
                 $byemsg . $this->CRLF;
      }
    }

    if(empty($e) || $close_on_error) {
      $this->Close();
    }

    return $rval;
  }

  /**
   * Sends the command RCPT to the SMTP server with the TO: argument of $to.
   * Returns true if the recipient was accepted false if it was rejected.
   *
   * Implements from rfc 821: RCPT <SP> TO:<forward-path> <CRLF>
   *
   * SMTP CODE SUCCESS: 250,251
   * SMTP CODE FAILURE: 550,551,552,553,450,451,452
   * SMTP CODE ERROR  : 500,501,503,421
   * @access public
   * @return bool
   * 说明：使用To向SMTP发送RCPT命令，参数为:$to
   */
  function Recipient($to) {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Recipient() without being connected");
      return false;
    }

    fputs($this->smtp_conn,"RCPT TO:<" . $to . ">" . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250 && $code != 251) {
      $this->error =
        array("error" => "RCPT not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }
    return true;
  }

  /**
   * Sends the RSET command to abort and transaction that is
   * currently in progress. Returns true if successful false
   * otherwise.
   *
   * Implements rfc 821: RSET <CRLF>
   *
   * SMTP CODE SUCCESS: 250
   * SMTP CODE ERROR  : 500,501,504,421
   * @access public
   * @return bool
   * 说明：发送RSET命令从而取消处理中传输。成功则返回true，否则为false
   */
  function Reset() {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Reset() without being connected");
      return false;
    }

    fputs($this->smtp_conn,"RSET" . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
        array("error" => "RSET failed",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }

    return true;
  }

  /**
   * Starts a mail transaction from the email address specified in
   * $from. Returns true if successful or false otherwise. If True
   * the mail transaction is started and then one or more Recipient
   * commands may be called followed by a Data command. This command
   * will send the message to the users terminal if they are logged
   * in.
   *
   * Implements rfc 821: SEND <SP> FROM:<reverse-path> <CRLF>
   *
   * SMTP CODE SUCCESS: 250
   * SMTP CODE SUCCESS: 552,451,452
   * SMTP CODE SUCCESS: 500,501,502,421
   * @access public
   * @return bool
   * 说明：从指定的邮件地址开始一个邮件传输
   */
  function Send($from) {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Send() without being connected");
      return false;
    }

    fputs($this->smtp_conn,"SEND FROM:" . $from . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
        array("error" => "SEND not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }
    return true;
  }

  /**
   * Starts a mail transaction from the email address specified in
   * $from. Returns true if successful or false otherwise. If True
   * the mail transaction is started and then one or more Recipient
   * commands may be called followed by a Data command. This command
   * will send the message to the users terminal if they are logged
   * in and send them an email.
   *
   * Implements rfc 821: SAML <SP> FROM:<reverse-path> <CRLF>
   *
   * SMTP CODE SUCCESS: 250
   * SMTP CODE SUCCESS: 552,451,452
   * SMTP CODE SUCCESS: 500,501,502,421
   * @access public
   * @return bool
   * 说明：从指定的邮件地址开始一个邮件传输
   */
  function SendAndMail($from) {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
          "error" => "Called SendAndMail() without being connected");
      return false;
    }

    fputs($this->smtp_conn,"SAML FROM:" . $from . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
        array("error" => "SAML not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }
    return true;
  }

  /**
   * Starts a mail transaction from the email address specified in
   * $from. Returns true if successful or false otherwise. If True
   * the mail transaction is started and then one or more Recipient
   * commands may be called followed by a Data command. This command
   * will send the message to the users terminal if they are logged
   * in or mail it to them if they are not.
   *
   * Implements rfc 821: SOML <SP> FROM:<reverse-path> <CRLF>
   *
   * SMTP CODE SUCCESS: 250
   * SMTP CODE SUCCESS: 552,451,452
   * SMTP CODE SUCCESS: 500,501,502,421
   * @access public
   * @return bool
   * 说明：从指定的邮件地址开始一个邮件传输
   */
  function SendOrMail($from) {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
          "error" => "Called SendOrMail() without being connected");
      return false;
    }

    fputs($this->smtp_conn,"SOML FROM:" . $from . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
        array("error" => "SOML not accepted from server",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }
    return true;
  }

  /**
   * This is an optional command for SMTP that this class does not
   * support. This method is here to make the RFC821 Definition
   * complete for this class and __may__ be implimented in the future
   *
   * Implements from rfc 821: TURN <CRLF>
   *
   * SMTP CODE SUCCESS: 250
   * SMTP CODE FAILURE: 502
   * SMTP CODE ERROR  : 500, 503
   * @access public
   * @return bool
   * 说明：这是一个可选的SMTP参数，目前phpmailer并不支持他，可能未来支持
   */
  function Turn() {
    $this->error = array("error" => "This method, TURN, of the SMTP ".
                                    "is not implemented");
    if($this->do_debug >= 1) {
      echo "SMTP -> NOTICE: " . $this->error["error"] . $this->CRLF;
    }
    return false;
  }

  /**
   * Verifies that the name is recognized by the server.
   * Returns false if the name could not be verified otherwise
   * the response from the server is returned.
   *
   * Implements rfc 821: VRFY <SP> <string> <CRLF>
   *
   * SMTP CODE SUCCESS: 250,251
   * SMTP CODE FAILURE: 550,551,553
   * SMTP CODE ERROR  : 500,501,502,421
   * @access public
   * @return int
   * 说明：通过服务器检查用户名是否经过验证
   */
  function Verify($name) {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Verify() without being connected");
      return false;
    }

    fputs($this->smtp_conn,"VRFY " . $name . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250 && $code != 251) {
      $this->error =
        array("error" => "VRFY failed on name '$name'",
              "smtp_code" => $code,
              "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
                 ": " . $rply . $this->CRLF;
      }
      return false;
    }
    return $rply;
  }

  /*******************************************************************
   *                       INTERNAL FUNCTIONS                       *
   ******************************************************************/

  /**
   * Read in as many lines as possible
   * either before eof or socket timeout occurs on the operation.
   * With SMTP we can tell if we have more lines to read if the
   * 4th character is '-' symbol. If it is a space then we don't
   * need to read anything else.
   * @access private
   * @return string
   */
  function get_lines() {
    $data = "";
    while($str = @fgets($this->smtp_conn,515)) {
      if($this->do_debug >= 4) {
        echo "SMTP -> get_lines(): /$data was /"$data/"" .
                 $this->CRLF;
        echo "SMTP -> get_lines(): /$str is /"$str/"" .
                 $this->CRLF;
      }
      $data .= $str;
      if($this->do_debug >= 4) {
        echo "SMTP -> get_lines(): /$data is /"$data/"" . $this->CRLF;
      }
      # if the 4th character is a space then we are done reading
      # so just break the loop
      if(substr($str,3,1) == " ") { break; }
    }
    return $data;
  }

}

 ?>