function command($command,$return_lenth=1,$return_code='2')
{
if ($this->connection==0)
{
$this->err_str="没有连接到任何服务器，请检查网络连接";
return false;
}
if ($this->debug)
$this->outdebug(">>> $command");
if (!fputs($this->connection,"$command \r\n"))
{
$this->err_str="无法发送命令".$command;
return false;
}
else
{
$resp=fgets($this->connection,256);
if($this->debug)
$this->outdebug("$resp");
if (substr($resp,0,$return_lenth)!=$return_code)
{
$this->err_str=$command." 命令服务器返回无效:".$resp;
return false;
}
else
return true;
}
}

Function open()
{
if($this->hostname=="")
{$this->err_str="无效的主机名!!";
return false;
}

if ($this->debug) echo "$this->hostname,$this->port,&$err_no, &$err_str, $this->timeout
";
if (!$this->connection=fsockopen($this->hostname,$this->port,&$err_no, &$err_str, $this->timeout))
{
$this->err_str="连接到　SMTP 服务器失败,错误信息：".$err_str."错误号：".$err_no;
return false;
}
else
{
$resp=fgets($this->connection,256);
if($this->debug)
$this->outdebug("$resp");
if (substr($resp,0,1)!="2")
{$this->err_str="服务器返回无效的信息：".$resp."请检查SMTP服务器是否正确";
return false;
}
return true;
}
}

Function Close()
{
if($this->connection!=0)
{
fclose($this->connection);
$this->connection=0;
}
}

Function Buildhead($from_name,$to_name,$from_mail,$to_mail,$subject)
{
if (empty($from_name))
$from_name=$from_mail;
if (empty($to_name)) $to_name=$to_mail;
$this->subject="From: =?$this->charset?B?".base64_encode($from_name)."?=<$from_mail>\r\n";
$this->subject.="To: =?$this->charset?B?".base64_encode($to_name)."?=<$to_mail>\r\n";
$subject=ereg_replace("\n","",$subject);
$this->subject.="Subject: =?$this->charset?B?".base64_encode($subject)."?=\r\n";
if ($this->debug) echo nl2br(htmlspecialchars($this->subject));
return true;
}

Function parse_html_body($html_body=null)
{
$passed="";
$image_count=0;
$this->temp_body_images=array();
while (eregi("\<*img([^\>]+)src[[:space:]]*=[[:space:]]*([^ ]+)",$html_body,$reg))
{

$pos=strpos($html_body,$reg[0]);
$passed.=substr($html_body,0,$pos);
$html_body=substr($html_body,$pos+strlen($reg[0]));
$image_tag=$reg[2];
$image_att=$reg[1];
$tag_len=strlen($image_tag);
if ($image_tag[0]=="'" or $image_tag[0]=='"')
$image_tag=substr($image_tag,1);
if (substr($image_tag,strlen($imgage_tag)-1,1)=="'" or substr($image_tag,strlen($imgage_tag)-1,1)=='"')
$image_tag=substr($image_tag,0,strlen($imgage_tag)-1);
//echo $image_tag."
";
$cid=md5(uniqid(rand()));
$cid=substr($cid,0,15)."unigenius.com";
$passed.="<img ".$image_att."src=\"cid:".$cid."\"";
$end_pos=strpos($html_body,'>');
$passed.=substr($html_body,0,$end_pos);
$html_body=substr($html_body,$end_pos);
// 把图片数据读出来保存到一个数据；

$img_file_con=fopen($image_tag,"r");
unset($image_data);
while ($tem_buffer=AddSlashes(fread($img_file_con,16777216)))
$image_data.=$tem_buffer;
fclose($img_file_con);
$image_exe_name=substr($image_tag,strrpos($image_tag,'.')+1,3);
switch (strtolower($image_exe_name))
{
case "jpg":
case "jpeg":
$content_type="image/jpeg";
break;
case "gif":
$content_type="image/gif";
break;
case "png":
$content_type="image/x-png";
break;
case "tif":
$content_type="image/tif";
break;
default:
$content_type="image/";
break;
}

$this->temp_body_images[$image_count][name]=basename($image_tag);
$this->temp_body_images[$image_count][type]=$content_type;
$this->temp_body_images[$image_count][cid]=$cid;
$this->temp_body_images[$image_count][data]=$image_data;
$image_count++;
}
$this->temp_html_body=$passed.$html_body;
return true;

}

function build_content($bound_level=0,$text_body,$html_body,$hava_att=false)
{
if ($html_body)
{
if (eregi("\<*img[[:space:]]+src[[:space:]]*=[[:space:]]*([^ ]+)",$html_body,$reg))
{
$bound_level++;
if ($text_body)
{
$this->body.="Content-Type: multipart/related;
type=\"multipart/alternative\";
\tboundary=\"";
$this->body.=$this->bound_begin.$bound_level.$this->bound_end."\"\r\n\r\n";
}
else
{
$this->body.="Content-Type: multipart/related;
\tboundary=\"";
$this->body.=$this->bound_begin.$bound_level.$this->bound_end."\"\r\n\r\n";

}// 对于是否 text 正文 、 html正文 有没有，须有不同的 MIME 头
if (!$hava_att) $this->body.="This is a multi-part message in MIME format.\r\n\r\n";
// 正文标识，如果是已经有附件的编码，则在正文 中不需要这一句
$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."\r\n";
$this->parse_html_body($html_body);
if ($text_body)
{
$this->body.="Content-Type: multipart/alternative;
\tboundary=\"";
$bound_level++;
$this->body.=$this->bound_begin.$bound_level.$this->bound_end."\"\r\n\r\n";
$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."\r\n";
$this->body.="Content-Type: text/plain;\r\n";
$this->body.="\tcharset=\"$this->charset\"\r\n";
$this->body.="Content-Transfer-Encoding: base64\r\n";
$this->body.="\r\n".chunk_split(base64_encode(StripSlashes($text_body)))."\r\n";
$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."\r\n";
$this->body.="Content-Type: text/html;\r\n";
$this->body.="\tcharset=\"$this->charset\"\r\n";
$this->body.="Content-Transfer-Encoding: base64\r\n";
$this->body.="\r\n".chunk_split(base64_encode(StripSlashes($this->temp_html_body)))."\r\n";
$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."--\r\n\r\n";
$bound_level--;
}
else
{
$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."\r\n";
$this->body.="Content-Type: text/html;\r\n";
$this->body.="\tcharset=\"$this->charset\"\r\n";
$this->body.="Content-Transfer-Encoding: base64\r\n";
$this->body.="\r\n".chunk_split(base64_encode(StripSlashes($this->temp_html_body)))."\r\n";
}//正文编码，有或没有　text 部分，编成不同的格式。
for ($i=0;$i<count($this->temp_body_images);$i++)
{
$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."\r\n";
$this->body.="Content-Type:".$this->temp_body_images[$i][type].";
name=\"";
$this->body.=$this->temp_body_images[$i][name]."\"\r\n";
$this->body.="Content-Transfer-Encoding: base64\r\n";
$this->body.="Content-ID: <".$this->temp_body_images[$i][cid].">\r\n";
$this->body.="\r\n".chunk_split(base64_encode(StripSlashes($this->temp_body_images[$i][data])))."\r\n";
}
$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."--\r\n\r\n";
$bound_level--;
}
else // 有或没有图片，以上是有图片的处理，下面是没有图片的处理
{
$this->temp_html_body=$html_body;
if ($text_body)
{
$bound_level++;
$this->body.="Content-Type: multipart/alternative;
\tboundary=\"";
$this->body.=$this->bound_begin.$bound_level.$this->bound_end."\"\r\n\r\n";

if (!$hava_att) $this->body.="\r\nThis is a multi-part message in MIME format.\r\n\r\n";
$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."\r\n";
$this->body.="Content-Type: text/plain;\r\n";
$this->body.="\tcharset=\"$this->charset\"\r\n";
$this->body.="Content-Transfer-Encoding: base64\r\n";
$this->body.="\r\n".chunk_split(base64_encode(StripSlashes($text_body)))."\r\n";
$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."\r\n";
$this->body.="Content-Type: text/html;\r\n";
$this->body.="\tcharset=\"$this->charset\"\r\n";
$this->body.="Content-Transfer-Encoding: base64\r\n";
$this->body.="\r\n".chunk_split(base64_encode(StripSlashes($this->temp_html_body)))."\r\n";
$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."--\r\n\r\n";
$bound_level--;
}
else
{
$this->body.="Content-Type: text/html;\r\n";
$this->body.="\tcharset=\"$this->charset\"\r\n";
$this->body.="Content-Transfer-Encoding: base64\r\n";
$this->body.="\r\n".chunk_split(base64_encode(StripSlashes($this->temp_html_body)))."\r\n";
}//正文编码，有或没有　text 部分，编成不同的格式。

}// end else
}
else // 如果没有　html 正文，只有　text 正文　
{
$this->body.="Content-Type: text/plain;
\tcharset=\"$this->charset\"\r\n";
$this->body.="Content-Transfer-Encoding: base64\r\n";
$this->body.="\r\n".chunk_split(base64_encode(StripSlashes($text_body)))."\r\n";
}
}// end function default

Function Buildbody($text_body=null,$html_body=null,$att=null)
{
$this->body="MIME-Version: 1.0\r\n";
if (null==$att or (count($att)==0)) //如果没有附件，查看正文的类型　；
{
$encode_level=0;
$this->build_content($encode_level,$text_body,$html_body);
}// 如果没有附件，
// ********************************************************
else //如果有附件，
{
$bound_level=0;
$this->body.="Content-Type: multipart/mixed;
\tboundary=\"";
$bound_level++;

$this->body.=$this->bound_begin.$bound_level.$this->bound_end."\"\r\n\r\n";
$this->body.="This is a multi-part message in MIME format.\r\n\r\n";
$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."\r\n";
$this->build_content($bound_level,$text_body,$html_body,true);// 编入正文部分

$num=count($att);
for ($i=0;$i<$num;$i++)
{
$file_name=$att[$i][name];
$file_source=$att[$i][source];
$file_type=$att[$i][type];
$file_size=$att[$i][size];

if (file_exists($file_source))
{
$file_data=addslashes(fread($fp=fopen($file_source,"r"), filesize($file_source)));
$file_data=chunk_split(base64_encode(StripSlashes($file_data)));
$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."\r\n";
$this->body.="Content-Type: $file_type;\r\n\tname=\"$file_name\"\r\nContent-Transfer-Encoding: base64\r\n";
$this->body.="Content-Disposition: attachment;\r\n\tfilename=\"$file_name\"\r\n\r\n";
$this->body.=$file_data."\r\n";
}
}//end for

$this->body.="--".$this->bound_begin.$bound_level.$this->bound_end."--\r\n\r\n";
}// end else

if ($this->debug) echo nl2br(htmlspecialchars($this->body));

return true;
}

function send($from_name,$to_name,$from_mail,$to_mail,$subject,$text_body=false,$html_body=false,$att=false)
{

if (empty($from_mail) or empty($to_mail))
{
$this->err_str="没有指定正确的邮件地址:发送人：".$from_mail."接收人：".$to_mail;
return false;
}

if (gettype($to_mail)!="array")
$to_mail=split(",",$to_mail);//如果不是数组，转换成数组，哪怕只有一个发送对象;
if (gettype($to_name)!="array")
$to_name=split(",",$to_name);//如果不是数组，转换成数组，哪怕只有一个发送对象;

$this->Buildbody($text_body,$html_body,$att);
// 所有信件的内容是一样的，可以只编一次，而对于不同的收信人，需要不同的　Head

if (!$this->open()) return false;
if (!$this->command("HELO $this->hostname",3,"250")) return false;
// 与服务器建立链接
if (!$this->open()) return false;
if (!$this->command("HELO $this->hostname",3,"250")) return false;

for ($i=0;$i<count($to_mail);$i++)
{
$this->Buildhead($from_name,$to_name[$i],$from_mail,$to_mail[$i],$subject);
if (!$this->command("RSET",3,"250")) return false;
if (!$this->command("MAIL FROM:".$from_mail,3,"250")) return false;
if (!$this->command("RCPT TO:".$to_mail[$i],3,"250")) return false;
if (!$this->command("DATA",3,"354")) return false;
// 准备发送邮件
if ($this->debug) $this->outdebug("sending subject;");
if (!fputs($this->connection,$this->subject)) {$this->err_str="发送邮件头时出错！";return false;}
if ($this->debug) $this->outdebug("sending body;");
if (!fputs($this->connection,$this->body)) {$this->err_str="发送正文时出错！";return false;}
if (!fputs($this->connection,".\r\n")) {$this->err_str="发送正文时出错！";return false;}//正文发送完毕，退出；
$resp=fgets($this->connection,256);
if($this->debug)
$this->outdebug("$resp");
if (substr($resp,0,1)!="2")
{
$this->err_str="发送完后，服务器没有响应！！";
return false;
}
// 发送邮件
}
if (!$this->command("QUIT",3,"221")) return false;
$this->close();
return true;
}

}//end class define
}//end if(!isset($__smtp_class__))
?>

PHP SMTP类使用方法
<?
include("smtp.php");

$mail = new smtp("localhost");

$mail->debug = 0;

$sender_name = "root";
$sender_mail = "rootlocalhost";
$to_name = "mm";
$to_mail = "mmyour.com";
$subject = "i miss u";
$content = "i miss u much.";
$att[0]["name"] = "miss.jpg";
$att[0]["source"] = "/path/to/your/miss.jpg";
$att[0]["type"] = "image/jpeg";
$att[0]["size"] = "10kb";
$extra_subject = "To:".$to_mail." 主题:".$subject;

if (!$mail->send($sender_name,$to_name,$sender_mail,$to_mail,$extra_subject,$content,false,$att))
$err = 1;
?>

返回文件的MIME类型的函数guessMIMEType()
function guessMIMEType($filename) {
//GUESS MIME TYPE
$filename = basename($filename);
if(strrchr($filename,".") == false) {
return("application/octet-stream");
}

$ext = strrchr($filename,".");
switch($ext) {
case ".gif":
return "image/gif";
break;
case ".gz":
return "application/x-gzip";
case ".htm":
case ".html":
return "text/html";
break;
case ".jpg":
return "image/jpeg";
break;
case ".tar":
return "application/x-tar";
break;
case ".txt":
return "text/plain";
break;
case ".zip":
return "application/zip";
break;
default:
return "application/octet-stream";
break;
}
}

检测Email地址的函数IsValidEmail()
function IsValidEmail($Email) {
if(!ereg("^[[:alnum:]\_\.]+([[:alnum:]\_]+\.)+[[:alnum:]][[:alnum:]][[:alnum:]]?$",$Email, $regs)){
$IsValidEmail = false;
}
else
{
$IsValidEmail = true;
}
return $IsValidEmail;
}

一个MIME MAIL类，请大家注意如何构造一个邮件体
<?
class mime_mail
{
var $parts;
var $to;
var $from;
var $headers;
var $subject;
var $body;

/*
* void mime_mail()
* class constructor
*/
function mime_mail()
{
$this->parts = array();
$this->to = "";
$this->from = "";
$this->subject = "";
$this->body = "";
$this->headers = "";
}

/*
* void add_attachment(string message, [string name], [string ctype])
* Add an attachment to the mail object
*/
function add_attachment($message, $name = "", $ctype = "application/octet-stream")
{
$this->parts[] = array (
"ctype" => $ctype,
"message" => $message,
"encode" => $encode,
"name" => $name
);
}

/*
* void build_message(array part=
* Build message parts of an multipart mail
*/
function build_message($part)
{
$message = $part["message"];
$message = chunk_split(base64_encode($message));
$encoding = "base64";
return "Content-Type: ".$part["ctype"].
($part["name"]?";\n\tname=\"".$part["name"]."\"" : "").
"\nContent-Transfer-Encoding: $encoding".
"\nContent-Disposition: attachment".
($part["name"]?";\n\tfilename=\"".$part["name"]."\"" : "").
"\n\n$message\n";
}

/*
* void build_multipart()
* Build a multipart mail
*/
function build_multipart()
{
$boundary = "b".md5(uniqid(time()));
$multipart = "Content-Type: multipart/mixed;\n\tboundary=\"$boundary\"\n\nThis is a MIME encoded message.\n\n--$boundary";

for($i = sizeof($this->parts)-1; $i >= 0; $i--)
{
$multipart .= "\n".$this->build_message($this->parts[$i])."--$boundary";
}
return $multipart.= "--\n";
}

/*
* void send()
* Send the mail (last class-function to be called)
*/
function send()
{
$addtionheaders = "";
if (!empty($this->from))
$addtionheaders .= "From: ".$this->from."\n";
if (!empty($this->headers))
$addtionheaders .= $this->headers."\n";

if (!empty($this->body))
$this->add_attachment($this->body, "", "text/plain");

$addtionheaders .= "MIME-Version: 1.0\n".$this->build_multipart();

$fp = fopen("mail.txt","w");
fputs($fp,$addtionheaders);
fclose($fp);
mail($this->to, $this->subject, "", $addtionheaders);
}
}; // end of class

/*
* Example usage
*

$attachment = fread(fopen("test.jpg", "r"), filesize("test.jpg"));

$mail = new mime_mail();
$mail->from = "foobar.com";
$mail->headers = "Errors-To: foobar.com";
$mail->to = "barfoo.com";
$mail->subject = "Testing...";
$mail->body = "This is just a test.";
$mail->add_attachment("$attachment", "test.jpg", "image/jpeg");
$mail->send();

*/
?>

myimap类，读取邮件
<?php
//////////////////////////////////////////////
//Origin by Alpha.Z (5/21/2000)
//Modified By Belltree <belltree163.com> (11/01/2000)
///////////////////////////////////////////////
class myimap
{
var $username="";
var $userpwd="";
var $hostname="";
var $port=0;
var $connection=0; //是否连接
var $state="DISCONNECTED"; //连接状态
var $greeting="";
var $must_update=0;
var $inStream=0;
var $num_msg_parts = 0;
var $attach;
var $num_of_attach = 0;

function open()
{
if ($this->port==110)
$this->inStream=imap_open("{".$this->hostname."/pop3:110}inbox",$this->username,$this->userpwd);
else
$this->inStream=imap_open("{".$this->hostname.":143}INBOX",$this->username,$this->userpwd);

if ($this->inStream)
{
//echo "用户：$this->username 的信箱连接成功。
";
return $inStream;
}
else
{
echo "用户：$this->username 的信箱连接失败。
";
return 0;
}
}

Function close()
{
if(imap_close($this->inStream))
{
//echo "<hr>已经与服务器 $this->hostname 断开连接。";
return 1;
}
else
{
//echo "<hr>与服务器 $this->hostname 断开连接失败。";
return 0;
}
}

function DeleteMail($msg_no){
if (imap_delete($this->inStream,$msg_no))
return true;
else
return false;
}

function ExpungeMail(){
if (imap_expunge($this->inStream))
return true;
else
return false;
}

function CheckMailbox($page_size,$page)
{
$mboxinfo=imap_mailboxmsginfo($this->inStream);
//$mboxinfo=imap_check($this->inStream);
if ($mboxinfo)
if ($mboxinfo->Nmsgs>0)
{
//echo "您邮箱：".$mboxinfo->Mailbox."
";
echo $this->username."wells.com的收件箱里共有邮件数：".$mboxinfo->Nmsgs."
\n";
echo "未读邮件数：".$mboxinfo->Unread."　";
echo "新邮件数：".$mboxinfo->Recent." ";
echo "总共占用空间：".$mboxinfo->Size."字节
\n";
$last_page = ceil($mboxinfo->Nmsgs/$page_size);
$cur_page = $page +1;
$num_page = $last_page;
echo "第".$cur_page."页，共".$last_page."页。\n";
}
else
{
echo "您的信箱里没有邮件。
<hr>\n";
}
else
{
echo '<font color="#ff0000">错误：无法获取收件箱的信息。</font>';
return 0;
}
echo "<table border=1 width=100% cellpadding=2 cellspacing=0 bordercolorlight=#000080 bordercolordark=#ffffff Tahoma,宋体\">\n";
echo "<tr bgcolor=#ffffd8><td width=24>状态</td><td width=24> </td><td>发件人</td><td>主题</td><td>时间</td><td>大小</td></tr>\n";
$sortby="SORTDATE";
$sort_reverse=1;
$sorted = imap_sort($this->inStream, $sortby, $sort_reverse, SE_UID);

for ($i=0;$i<$mboxinfo->Nmsgs;$i++)
{
if (($i>=$page*$page_size) and ($i<$page*$page_size+$page_size)){
$msg_no = imap_msgno($this->inStream, $sorted[$i]);
$msgHeader = imap_header($this->inStream, $msg_no);
//日期

if (isset($msgHeader->date))
{
$date = $msgHeader->date;

if (ord($date) > 64)
$date = substr($date, 5);

$datepart = split(" ",$date);
$date = $datepart[0]." ".$datepart[1]." ".$datepart[2]." ".$datepart[3];
/*
while (strstr(' ', $date))
{
$date = str_replace(' ', ' ', $date);
}
*/
}

if (isset($msgHeader->from[0]))
{
$from = $msgHeader->from[0];
if (isset($from->personal))
{
$frm = trim($this->decode_mime_string($from->personal));
if (isset($from->mailbox) && isset($from->host))
{
$frm_add = $from->mailbox . '' . $from->host;
}
}
else
if (isset($from->mailbox) && isset($from->host))
{
$frm = $from->mailbox . '' . $from->host;
}
else
if (isset($msgHeader->fromaddress))
$frm = trim($h->fromaddress);
}
else
if (isset($msgHeader->fromaddress))
$frm = trim($msgHeader->fromaddress);

if (isset($msgHeader->toaddress))
$to = trim($msgHeader->toaddress);
else
$to = "未知";

if (isset($msgHeader->subject))
$sub = trim($this->decode_mime_string($msgHeader->subject));
if ($sub == "")
$sub = "无主题";
if (isset($msgHeader->Size))
$msg_size = ($msgHeader->Size > 1024) ? sprintf("%.0f kb", $msgHeader->Size / 1024) : $msgHeader->Size;
//if (strlen($frm) > 50)
// $frm = substr($frm, 0, 50) . '...';
if (strlen($sub) > 50)
$sub = substr($sub, 0, 50) . '...';
if ($msgHeader->Unseen == "U")
$newmail = "未读";
else
$newmail = "已读";
echo "<tr>\n";
echo "<td align=center>$newmail</td><td align=\"center\"></td>\n";
echo '<td>'.$frm.'</td><td><a href="mail_read.php?msg='.$msg_no.'">'.$sub.'</a></td><td width=125>'.$date.'</td><td width=50>'.$msg_size.'</td>';
echo "</tr>\n";
}}
echo "</table>\n";
echo "<table border=0 width=100% cellspacing=4 cellpadding=4><tr>\n";
if ($page == 0)
echo "<td>第一页</td>\n";
else
echo "<td><a href=\"mail_list.php?page=0\">第一页</a></td>\n";
if (($prev_page = $page-1) < 0)
echo "<td>前一页</td>\n";
else
echo "<td><a href=\"mail_list.php?page=$prev_page\">前一页</a></td>\n";

if (($next_page = $page + 1) >= $last_page)
echo "<td>后一页</td>\n";
else
echo "<td><a href=\"mail_list.php?page=$next_page\">后一页</a></td>\n";
$last_page --;
if ( $last_page < $next_page)
echo "<td>最末页</td>\n";
else
echo "<td><a href=\"mail_list.php?page=$last_page\">最末页</a></td>\n";
echo "</tr></table>\n";
}

function decode_mime_string ($string)
{
$pos = strpos($string, '=?');
if (!is_int($pos))
{
return $string;
}

$preceding = substr($string, 0, $pos); // save any preceding text

$search = substr($string, $pos+2, 75); // the mime header spec says this is the longest a single encoded word can be
$d1 = strpos($search, '?');
if (!is_int($d1))
{
return $string;
}

$charset = substr($string, $pos+2, $d1);
$search = substr($search, $d1+1);

$d2 = strpos($search, '?');
if (!is_int($d2))
{
return $string;
}

$encoding = substr($search, 0, $d2);
$search = substr($search, $d2+1);

$end = strpos($search, '?=');
if (!is_int($end))
{
return $string;
}

$encoded_text = substr($search, 0, $end);
$rest = substr($string, (strlen($preceding . $charset . $encoding . $encoded_text)+6));

switch ($encoding)
{
case 'Q':
case 'q':
$encoded_text = str_replace('_', '%20', $encoded_text);
$encoded_text = str_replace('=', '%', $encoded_text);
$decoded = urldecode($encoded_text);
break;

case 'B':
case 'b':
$decoded = urldecode(base64_decode($encoded_text));
break;

default:
$decoded = '=?' . $charset . '?' . $encoding . '?' . $encoded_text . '?=';
break;
}

return $preceding . $decoded . $this->decode_mime_string($rest);
}

Function display_toaddress ($user, $server, $from)
{
return is_int(strpos($from, $this->get_barefrom($user, $server)));
}

Function get_barefrom($user, $server)
{
$barefrom = "$user$real_server";

return $barefrom;
}

Function get_structure($msg_num)
{
$structure=imap_fetchstructure($this->inStream,$msg_num);
//echo gettype($structure);
return $structure;
}

Function proc_structure($msg_part, $part_no, $msg_num)
{
if ($msg_part->ifdisposition)
{
// See if it has a disposition, The only thing I know of that this, would be used for would be an attachment
// Lets check anyway
if ($msg_part->disposition == "attachment")
{
$att_name = "unknown";
for ($lcv = 0; $lcv < count($msg_part->parameters); $lcv++)
{
$param = $msg_part->parameters[$lcv];

if ($param->attribute == "name")
{
$att_name = $param->value;
break;
}
}

$att_name = $this->decode_mime_string($att_name);

$att_path = $this->username."\\".$att_name;

$this->attach[$this->num_of_attach]=$att_name; //登记附件列表
$this->num_of_attach ++; //登记附件数量
/*
$att_path = $this->username."\\".$this->decode_mime_string($att_name);
if ($this->attach=="")
$this->attach = $att_name;
else
$this->attach .= ";".$att_name;
*/
if (!is_dir($this->username))
mkdir($this->username,0700);
$fp=fopen($att_path,"w");
switch ($msg_part->encoding)
{
case 3: // base64
fputs($fp,imap_base64(imap_fetchbody($this->inStream,$msg_num,$part_no)));
break;
case 4: // QP
fputs($fp,imap_qprint(imap_fetchbody($this->inStream,$msg_num,$part_no)));
break;
default:
fputs($fp,imap_fetchbody($this->inStream,$msg_num,$part_no));
break;
}
fclose($fp);

//if ($msg_part->type=="5"){
// echo "<p align=center><hr align=center>\n";
// echo "<img src=\"$att_path\" align=center></p>\n";
/