利用php中mail函数发送带有附件的邮件

// 当发送 HTML 电子邮件时，请始终设置 content-type
$headers = "MIME-Version: 1.0" . "rn";

$headers .= "Content-type:text/html; charset=utf-8";

mail($to,$subject,$message,$headers);
?>

class Mail {
private $topic;
private $toaddr;
private $fromaddr;
private $cc;
private $content;
private $attach;
private $header;
private $domain;//邮箱域
private $msg;

private $filename;
private $filemime;
private $filestr;

private $boundary;
private $uniqid;

private $eol; //每行末尾所加的换行符类型

function __construct(){
$this->getEOT();//生成结尾换行符
$this->getUniq_id();
$this->header='';
$this->attach='';
$this->cc='';
$this->msg='';

}

public function getFromaddr() {
return $this->fromaddr;
}

public function setFromaddr($fromaddr) {
$this->fromaddr = $fromaddr;
}

public function getTopic() {
return $this->topic;
}

public function getToaddr() {
return $this->toaddr;
}

public function getCc() {
return $this->cc;
}

public function getContent() {
return $this->content;
}

public function getAttach() {
return $this->attach;
}

public function setTopic($topic) {
$this->topic = mb_convert_encoding(trim($topic),'UTF-8','auto');
}

public function setToaddr($toaddr) {
$this->toaddr = trim($toaddr);
}

public function setCc($cc) {
$this->cc = trim($cc);
}

public function setContent($content) {
$this->content = mb_convert_encoding(trim($content),'UTF-8','auto');
}

public function setAttach($attach) {
$this->attach = trim($attach);
}

public function getDomain() {
return $this->domain;
}

public function setDomain($domain) {
$this->domain = $domain;//输入的值为'@domain.com'
}

/*
* 根据系统类型设置换行符
*/
private function getEOT() {
if (strtoupper ( substr ( PHP_OS, 0, 3 ) == 'WIN' )) {
$this->eol = "rn";
} elseif (strtoupper ( substr ( PHP_OS, 0, 3 ) == 'MAC' )) {
$this->eol= "r";
} else {
$this->eol = "n";
}
}

private function getBoundary(){

$this->boundary= '--'.substr(md5(time().rand(1000,2000)),0,16);

}

private function getUniq_id(){

$this->uniqid= md5(microtime().time().rand(1,100));

}

private function outputCommonHeader(){
$this->header .= 'From: '.$this->fromaddr.$this->eol;
//$this->header .= 'To: '.$this->toaddr.$this->eol;
//$this->header .= 'Subject: '.$this->topic.$this->eol;
$this->header .= 'Message-ID: <'.$this->uniqid.$this->domain.'>'.$this->eol;
$this->header .= 'MIME-Version: 1.0'.$this->eol;
$this->header .= 'Reply-To: '.$this->fromaddr.$this->eol;
$this->header .= 'Return-Path: '.$this->fromaddr.$this->eol;
$this->header .= 'X-Mailer: Xmail System'.$this->eol;
$this->header .= 'Content-Disposition: inline'.$this->eol;
}

private function mime_content_type ( $f )
{
$temp = trim ( exec ('file -bi ' . escapeshellarg ( $f ) ) ) ;
$temp = preg_replace('/s+/',' ',$temp);
$temp = explode(' ',$temp);
return $temp[0];
}//判断文件的mime类型

/*
* 只带有抄送
*/
private function mailWithCC(){
$this->header .= 'Cc: '.$this->cc.$this->eol;
$this->header .= 'Content-type: text/html; charset=UTF-8'.$this->eol;
$this->header .= 'Content-Transfer-Encoding: 8bit'.$this->eol;
$this->msg = $this->content;
if(mail($this->toaddr,$this->topic,$this->msg,$this->header)){

return 1;
}else{
return 0;
}
}
/*
* $filedir需要是绝对地址
*/
private function attachmentToBase64($filedir){
$this->filename = basename($filedir);
@$fopen = fopen($filedir,'r');
$str = fread($fopen,filesize($filedir));
$str = base64_encode($str);
$this->filestr = $str;
}

/*
* 只带有附件
*/
private function mailWithAttach(){
$this->attachmentToBase64($this->attach);
$this->header .= 'Content-type: multipart/mixed; boundary="'.str_replace('--','',$this->boundary).'"'.$this->eol;
$this->msg .= $this->eol.$this->boundary.$this->eol;
$this->msg .= 'Content-Type: text/html; charset=utf-8'.$this->eol;
$this->msg .= 'Content-Disposition: inline'.$this->eol;
$this->msg .= $this->eol.$this->content.$this->eol;
$this->msg .= $this->boundary.$this->eol;
$this->msg .= 'Content-Type: '.$this->mime_content_type($this->attach).$this->eol;
$this->msg .= 'Content-Disposition: attachment; filename="'.$this->filename.'"'.$this->eol;
$this->msg .= 'Content-Transfer-Encoding: base64'.$this->eol;
$this->msg .= $this->eol.$this->filestr.$this->eol;
$this->msg .= $this->eol.$this->boundary.'--';

if(mail($this->toaddr,$this->topic,$this->msg,$this->header)){

return 1;
}else{
return 0;
}
}

/*
* 带有附件和抄送
*/
private function mailAll(){

$this->attachmentToBase64($this->attach);
$this->header .= 'Cc: '.$this->cc.$this->eol;
$this->header .= 'Content-type: multipart/mixed; boundary="'.str_replace('--','',$this->boundary).'"'.$this->eol;
$this->msg .= $this->eol.$this->boundary.$this->eol;
$this->msg .= 'Content-Type: text/html; charset=utf-8'.$this->eol;
$this->msg .= 'Content-Disposition: inline'.$this->eol;
$this->msg .= $this->eol.$this->content.$this->eol;
$this->msg .= $this->boundary.$this->eol;
$this->msg .= 'Content-Type: '.$this->mime_content_type($this->attach).$this->eol;
$this->msg .= 'Content-Disposition: attachment; filename="'.$this->filename.'"'.$this->eol;
$this->msg .= 'Content-Transfer-Encoding: base64'.$this->eol;
$this->msg .= $this->eol.$this->filestr.$this->eol;
$this->msg .= $this->eol.$this->boundary.'--';

if(mail($this->toaddr,$this->topic,$this->msg,$this->header)){

return 1;
}else{
return 0;
}

}
/*
* 不带抄送和附件
*/
private function mailSimple(){
$this->header .= 'Content-type: text/html; charset=UTF-8'.$this->eol;
$this->header .= 'Content-Transfer-Encoding: 8bit'.$this->eol;
$this->msg = $this->content;
if(mail($this->toaddr,$this->topic,$this->msg,$this->header)){

return 1;
}else{
return 0;
}
}

public function send(){

if(empty($this->attach)&&empty($this->cc)){
$this->outputCommonHeader();
return $this->mailSimple();

}else if(empty($this->attach)){
$this->outputCommonHeader();
return $this->mailWithCC();

}else if(empty($this->cc)){
$this->outputCommonHeader();
$this->getBoundary(); //有附件就生成boundary
return $this->mailWithAttach();

}else if(!empty($this->toaddr)&&!empty($this->topic)&&!empty($this->cc)&&!empty($this->content)&&!empty($this->attach)){
$this->outputCommonHeader();
$this->getBoundary(); //有附件就生成boundary
return $this->mailAll();
}
}
}

$m = new Mail();
$m->setToaddr($this->temp['receipt_address']);
$m->setTopic($this->temp['mail_title']);
$m->setContent($this->temp['mail_content']);
$m->setFromaddr($_SESSION['user']['name'].' <'.$_SESSION['user']['name'].'@'.SystemDomain.'>');
$m->setDomain('@'.SystemDomain);
$m->setCc($this->temp['cc_address']);
$m->setAttach(PATH.'/temp/'.$this->temp['attachment_file']);
$m->send();