php 发送带附件邮件的类

/**
* 发送带附件的邮件
* by bbs.it-home.org
*/
class CMailFile {
    var $subject;
    var $addr_to;
    var $text_body;
    var $text_encoded;
    var $mime_headers;
    var $mime_boundary = "--==================_846811060==_";
    var $smtp_headers;

    function CMailFile($subject,$to,$from,$msg,$filename,$downfilename,$mimetype = "application/octet-stream",$mime_filename = false) {
        $this->subject = $subject;
        $this->addr_to = $to;
        $this->smtp_headers = $this->write_smtpheaders($from);
        $this->text_body = $this->write_body($msg);
        $this->text_encoded = $this->attach_file($filename,$downfilename,$mimetype,$mime_filename);
        $this->mime_headers = $this->write_mimeheaders($filename, $mime_filename);
    }

    function attach_file($filename,$downfilename,$mimetype,$mime_filename) {
        $encoded = $this->encode_file($filename);
        if ($mime_filename) $filename = $mime_filename;
        $out = "--" . $this->mime_boundary . "\n";
        $out = $out . "Content-type: " . $mimetype . "; name=\"$filename\";\n";
        $out = $out . "Content-Transfer-Encoding: base64\n";
        $out = $out . "Content-disposition: attachment; filename=\"$downfilename\"\n\n";
        $out = $out . $encoded . "\n";
        $out = $out . "--" . $this->mime_boundary . "--" . "\n";
        return $out;
    }

    function encode_file($sourcefile) {
        if (is_readable($sourcefile)) {
            $fd = fopen($sourcefile, "r");
            $contents = fread($fd, filesize($sourcefile));
            $encoded = chunk_split(base64_encode($contents));
            fclose($fd);
        }
        return $encoded;
    }

    function sendfile() {
        $headers = $this->smtp_headers . $this->mime_headers;
        $message = $this->text_body . $this->text_encoded;
        mail($this->addr_to,$this->subject,$message,$headers);
    }

    function write_body($msgtext) {
        $out = "--" . $this->mime_boundary . "\n";
        $out = $out . "Content-Type: text/plain; charset=\"us-ascii\"\n\n";
        $out = $out . $msgtext . "\n";
        return $out;
    }

    function write_mimeheaders($filename, $mime_filename) {
        if ($mime_filename) $filename = $mime_filename;
        $out = "MIME-version: 1.0\n";
        $out = $out . "Content-type: multipart/mixed; ";
        $out = $out . "boundary=\"$this->mime_boundary\"\n";
        $out = $out . "Content-transfer-encoding: 7BIT\n";
        $out = $out . "X-attachments: $filename;\n\n";
        return $out;
    }

    function write_smtpheaders($addr_from) {
        $out = "From: $addr_from\n";
        $out = $out . "Reply-To: $addr_from\n";
        $out = $out . "X-Mailer: PHP3\n";
        $out = $out . "X-Sender: $addr_from\n";
        return $out;
    }
}

/*用法 - 例如:mimetype 为 "image/gif"
    $mailfile = new CMailFile($subject,$sendto,$replyto,$message,$filename,$mimetype);
    $mailfile->sendfile();

    $subject -- 主题
    $sendto -- 收信人地址
    $replyto -- 回复地址
    $message -- 信件内容
    $filename -- 附件文件名
    $downfilename -- 下載的文件名
    $mimetype -- mime类型
*/
?>

2，演示示例 demo.php

    require_once('emailclass.php');

    //发送邮件

    //主題
    $subject = "test send email";

    //收件人
    $sendto = 'abc@163.com';

    //發件人
    $replyto = 'cdf@163.com';

    //內容
    $message = "test send email content";

    //附件
    $filename = 'test.jpg';

    //附件类別
    $mimetype = "image/jpeg";

    $mailfile = new CMailFile($subject,$sendto,$replyto,$message,$filename,$excelname,$mimetype);
    $mailfile->sendfile();
?>

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