PHP发邮件函数实现代码

$pdfname="test.pdf";
$email="test@test.com";
$text = "您好，附件中是您需要的pdf文件。请点击下载。<br><a href=http://www.111cn.net>www.111cn.net</a>";         //文本内容

$text = base64_encode($text);     //用base64方法把它编码
$text = chunk_split($text);     //把这个长字符串切成由每行76个字符组成的小块

$subject = $pdfname;         //标题
$from = "admin@111cn.net";     //发送者
$to = $email;     //接受者

//附件
// 定义分界线
$boundary = "nextpart_".uniqid("");
$boundary2 = "nextpart_".uniqid("");
$headers = "to: $torn";
$headers .= "from: $fromrn";
$headers .="mime-version: 1.0rn";
$headers .= "content-type: multipart/mixed;
            boundary="----=_$boundary"rn";

$read=file_get_contents($pdfname);

$read = base64_encode($read);     //用base64方法把它编码
$read = chunk_split($read);     //把这个长字符串切成由每行76个字符组成的小块

//现在我们可以建立邮件的主体
$body = "this is a multi-part message in mime format.

------=_$boundary
content-type: multipart/alternative;
    boundary="----=_$boundary2";

------=_$boundary2
content-type: text/html;
    charset="gbk"
content-transfer-encoding: base64

$text

------=_$boundary2--

------=_$boundary
content-type: application/octet-stream;
    charset="gbk";
    name="$pdfname"
content-disposition: attachment; filename="$pdfname"
content-transfer-encoding: base64

$read

-------=_$boundary--";

if(mail($to, $subject,$body,$headers))
   echo "您需要的pdf文件(".$pdfname.")已经发往您的邮箱：".$to."。<br>请查收。";
else
   echo "抱歉，发送失败了。<br>";

class sendmail{
    function __construct(){
        $this->set();
        $this->auth = 1;
    }

    function set($server=yj_sysmail_smtp,$user="",$password=yj_sysmail_pass,$port=yj_sysmailport,$type=1,$mailusername=0){
        $user=($user=="")?substr(yj_sysmail,0,stripos(yj_sysmail,"@")):$user;

        $this->type = $type;
        $this->server = $server;
        $this->port = $port;
        $this->user = $user;
        $this->password = $password;
        $this->mailusername = $mailusername;
    }

    function send($email_to, $email_subject, $email_message, $email_from = ''){
        $email_subject = '=?utf-8?b?'.base64_encode(str_replace("r", '', $email_subject)).'?=';
        $email_message = str_replace("rn.", " rn..", str_replace("n", "rn", str_replace("r", "n", str_replace("rn", "n", str_replace("nr", "r", $email_message)))));
        $email_from = $email_from == '' ? '=?utf-8?b?'.base64_encode(yj_sysname)."?= <".yj_sysmail.">" : (preg_match('/^(.+?) <(.+?)>$/',$email_from, $from) ? '=?utf-8?b?'.base64_encode($from[1])."?= <$from[2]>" : $email_from);
        $emails = explode(',', $email_to);
        foreach($emails as $touser){
            $tousers[] = preg_match('/^(.+?) <(.+?)>$/',$touser, $to) ? ($this->mailusername ? '=?utf-8?b?'.base64_encode($to[1])."?= <$to[2]>" : $to[2]) : $touser;
        }
        $email_to = implode(',', $tousers);
        $headers = "mime-version: 1.0rnto: {$email_to}rnfrom: {$email_from}<{$email_from}>rnx-priority: 3rnx-mailer: eglive rndate: ".date("r")."rncontent-type: text/html; charset=utf-8rn";

        if($this->type == 1){
            return $this->smtp($email_to, $email_subject, $email_message, $email_from, $headers);
        }elseif($this->type == 2){
            return @mail($email_to, $email_subject, $email_message, $headers);
        }else{
            ini_set('smtp', $this->server);
            ini_set('smtp_port', $this->port);
            ini_set('sendmail_from', $email_from);
            return @mail($email_to, $email_subject, $email_message, $headers);
        }
    }

    function smtp($email_to, $email_subject, $email_message, $email_from = '', $headers = ''){
        if(!$fp = @fsockopen($this->server, $this->port, $errno, $errstr, 10)){
            $this->errorlog('smtp', "($this->server:$this->port) connect - unable to connect to the smtp server", 0);
            return false;
        }
        stream_set_blocking($fp, true);
        $lastmessage = fgets($fp, 512);
        if(substr($lastmessage, 0, 3) != '220'){
            $this->errorlog('smtp', "$this->server:$this->port connect - $lastmessage", 0);
            return false;
        }
        fputs($fp, ($this->auth ? 'ehlo' : 'helo')." phpcmsrn");
        $lastmessage = fgets($fp, 512);
        if(substr($lastmessage, 0, 3) != 220 && substr($lastmessage, 0, 3) != 250){
            $this->errorlog('smtp', "($this->server:$this->port) helo/ehlo - $lastmessage", 0);
            return false;
        }
        while(1){
            if(substr($lastmessage, 3, 1) != '-' || empty($lastmessage)){
                break;
            }
            $lastmessage = fgets($fp, 512);
        }
        fputs($fp, "auth loginrn");
        $lastmessage = fgets($fp, 512);
        if(substr($lastmessage, 0, 3) != 334){
            $this->errorlog('smtp', "($this->server:$this->port) auth login - $lastmessage", 0);
            return false;
        }
        fputs($fp, base64_encode($this->user)."rn");
        $lastmessage = fgets($fp, 512);
        if(substr($lastmessage, 0, 3) != 334){
            $this->errorlog('smtp', "($this->server:$this->port) username - $lastmessage", 0);
            return false;
        }
        fputs($fp, base64_encode($this->password)."rn");
        $lastmessage = fgets($fp, 512);
        if(substr($lastmessage, 0, 3) != 235){
            $this->errorlog('smtp', "($this->server:$this->port) password - $lastmessage", 0);
            return false;
        }
        fputs($fp, "mail from: <".preg_replace("/.*<(.+?)>.*/", "
", $email_from).">rn");
        $lastmessage = fgets($fp, 512);
        if(substr($lastmessage, 0, 3) != 250){
            fputs($fp, "mail from: <".preg_replace("/.*<(.+?)>.*/", "
", $email_from).">rn");
            $lastmessage = fgets($fp, 512);
            if(substr($lastmessage, 0, 3) != 250){
                $this->errorlog('smtp', "($this->server:$this->port) mail from - $lastmessage", 0);
                return false;
            }
        }
        $email_tos = array();
        $emails = explode(',', $email_to);
        foreach($emails as $touser){
            $touser = trim($touser);
            if($touser){
                fputs($fp, "rcpt to: <".preg_replace("/.*<(.+?)>.*/", "
", $touser).">rn");
                $lastmessage = fgets($fp, 512);
                if(substr($lastmessage, 0, 3) != 250){
                    fputs($fp, "rcpt to: <".preg_replace("/.*<(.+?)>.*/", "
", $touser).">rn");
                    $lastmessage = fgets($fp, 512);
                    $this->errorlog('smtp', "($this->server:$this->port) rcpt to - $lastmessage", 0);
                    return false;
                }
            }
        }
        fputs($fp, "datarn");
        $lastmessage = fgets($fp, 512);
        if(substr($lastmessage, 0, 3) != 354){
            $this->errorlog('smtp', "($this->server:$this->port) data - $lastmessage", 0);
        }
        $headers .= 'message-id: <'.gmdate('ymdhs').'.'.substr(md5($email_message.microtime()), 0, 6).rand(100000, 999999).'@'.$_server['http_host'].">rn";
        fputs($fp, "date: ".gmdate('r')."rn");
        fputs($fp, "to: ".$email_to."rn");
        fputs($fp, "subject: ".$email_subject."rn");
        fputs($fp, $headers."rn");
        fputs($fp, "rnrn");
        fputs($fp, "$email_messagern.rn");
        $lastmessage = fgets($fp, 512);
        fputs($fp, "quitrn");
        return true;
    }

    function errorlog($type, $message, $is){
        $this->error[] = array($type, $message, $is);
    }

    function mailmess($mess=""){
        return "<style>*{font-family:verdana;font-size:13px;/*www.111cn.net提供*/}</style>
        <table cellpadding='5' cellspacing='1' border='0' width='750' style='background-color:#fff;border:1px solid #3b5998;padding:15px;'>
        <tr><td style='background:#3b5998;color:#fff;font-weight:bold;font-size:14px;'>".yj_syscnname." - ".yj_sysname."</td></tr>
        <tr><td>{$mess}</td></tr>
      
        </table>";
    }
}