){  $outTextHeader = "";   
$outTextHeader .= "Content-Type: text/plain;  
charset=us-asciin";   
$outTextHeader .= "Content-Transfer-Encoding: 7bitnn";  
$outTextHeader .= $this->mailText. "n";  
return $outTextHeader;   
}  /************************************************  
函数formatHTMLHeader()把邮件主体内容加上html的文件头
******************************************/   
function formatHTMLHeader(){   
$outHTMLHeader = "";   
$outHTMLHeader .= "Content-Type: text/html;  
charset=us-asciin";   
$outHTMLHeader .= "Content-Transfer-Encoding: 7bitnn";  
$outHTMLHeader .= $this->mailHTML. "n";   
return $outHTMLHeader;  
}   
/**********************************   
函数 formatAttachmentHeader($inFileLocation)  把邮件中的附件标识出来  
********************************/   
function formatAttachmentHeader($inFileLocation){   
$outAttachmentHeader = "";  
//--用上面的函数getContentType($inFileLocation)得出附件类型  
$contentType = $this->getContentType($inFileLocation);   
//--如果附件是文本型则用标准的7位编码   
if(ereg( "text",$contentType)){     
$outAttachmentHeader .= "Content-Type: ".$contentType. ";n";  
$outAttachmentHeader .= ' name="'.basename($inFileLocation). '"'. "n";
  $outAttachmentHeader .= "Content-Transfer-Encoding: 7bitn";   
$outAttachmentHeader .= "Content-Disposition: attachment;n";  
  $outAttachmentHeader .= ' filename="'.basename($inFileLocation). '"'. "nn";  
$textFile = fopen($inFileLocation, "r");   
  while(!feof($textFile)){   
  $outAttachmentHeader .= fgets($textFile,1000);
  }   
//--关闭文件 fclose($textFile);  
$outAttachmentHeader .= "n";  
}  
//--非文本格式则用64位进行编码  
else{  $outAttachmentHeader .= "Content-Type: ".$contentType. ";n";  
$outAttachmentHeader .= ' name="'.basename($inFileLocation). '"'. "n";
  $outAttachmentHeader .= "Content-Transfer-Encoding: base64n";  
$outAttachmentHeader .= "Content-Disposition: attachment;n";  
  $outAttachmentHeader .= ' filename="'.basename($inFileLocation). '"'. "nn";
//--调用外部命令uuencode进行编码
exec( "uuencode -m $inFileLocation nothing_out",$returnArray);  
  for ($i = 1; $i<(count($returnArray)); $i++){   
$outAttachmentHeader .= $returnArray[$i]. "n";   
}   
}  return $outAttachmentHeader;  
}   
/******************************   
函数 send()用于发送邮件，发送成功返回值为true  
  ************************************/   
function send(){   
//--设置邮件头为空   
$mailHeader = "";   
//--添加抄送人
if($this->mailCC != "")  
$mailHeader .= "CC: ".$this->mailCC. "n";   
//--添加秘密抄送人   
if($this->mailBCC != "")  
$mailHeader .= "BCC: ".$this->mailBCC. "n";  
//--添加发件人
if($this->mailFrom != "")  
$mailHeader .= "FROM: ".$this->mailFrom. "n";  
//---------------------------邮件格式------------------------------  
//--文本格式
if($this->mailText != "" && $this->mailHTML == "" && $this->mailAttachments == ""){
return mail($this->mailTo,$this->mailSubject,$this->mailText,$mailHeader);  
}   
//--html或text格式  
else if($this->mailText != "" && $this->mailHTML != "" && $this->mailAttachments == ""){
$bodyBoundary = $this->getRandomBoundary();
$textHeader = $this->formatTextHeader();  
$htmlHeader = $this->formatHTMLHeader();  
//--设置 MIME-版本  
$mailHeader .= "MIME-Version: 1.0n";  
$mailHeader .= "Content-Type: multipart/alternative;n";
  $mailHeader .= ' boundary="'.$bodyBoundary. '"';  
$mailHeader .= "nnn";  
//--添加邮件主体和边界  
$mailHeader .= "--".$bodyBoundary. "n";  
$mailHeader .= $textHeader;   
$mailHeader .= "--".$bodyBoundary. "n";  
//--添加html标签   
$mailHeader .= $htmlHeader;   
$mailHeader .= "n--".$bodyBoundary. "--";   
//--发送邮件   
return mail($this->mailTo,$this->mailSubject, "",$mailHeader);  
}   
//--文本加html加附件   
else if($this->mailText != "" && $this->mailHTML != "" && $this->mailAttachments != ""){
$attachmentBoundary = $this->getRandomBoundary();
   $mailHeader .= "Content-Type: multipart/mixed;n";  
$mailHeader .= ' boundary="'.$attachmentBoundary. '"'. "nn";  
$mailHeader .= "This is a multi-part message in MIME format.n";
  $mailHeader .= "--".$attachmentBoundary. "n";  
  $bodyBoundary = $this->getRandomBoundary(1);  
  $textHeader = $this->formatTextHeader();  
$htmlHeader = $this->formatHTMLHeader();  
$mailHeader .= "MIME-Version: 1.0n";  
  $mailHeader .= "Content-Type: multipart/alternative;n";  
$mailHeader .= ' boundary="'.$bodyBoundary. '"';  
$mailHeader .= "nnn";  
  $mailHeader .= "--".$bodyBoundary. "n";  
$mailHeader .= $textHeader;  
$mailHeader .= "--".$bodyBoundary. "n";  
  $mailHeader .= $htmlHeader;  
$mailHeader .= "n--".$bodyBoundary. "--";   
//--获取附件值  
$attachmentArray = explode( ",",$this->mailAttachments);   
//--根据附件的个数进行循环  
for($i=0;$i<count($attachmentArray);$i++){  
//--分割  $mailHeader .= "n--".$attachmentBoundary. "n";  
//--附件信息  
$mailHeader .= $this->formatAttachmentHeader($attachmentArray[$i]);
  }   
$mailHeader .= "--".$attachmentBoundary. "--";   
return mail($this->mailTo,$this->mailSubject, "",$mailHeader);
  }   
return false;   
}   
}   
?>  


使用方法：
<?
Include “email.class”

$mail->setTo("a@a.com"); //收件人  
$mail-> setCC（"b@b.com,c@c.com"）; //抄送
$mail-> setCC（"d@b.com,e@c.com"）; //秘密抄送
$mail->setFrom(“f@f.com”);//发件人   
$mail->setSubject(“主题”) ; //主题
$mail->setText(“文本格式”)  ;//发送文本格式也可以是变量
$mail->setHTML(“html格式”)  ;//发送html格式也可以是变量
$mail->setAttachments(“c:a.jpg”) ;//添加附件,需表明路径
$mail->send(); //发送邮件 

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