发现一个发送mime邮件的类。

<?php

    // 存成 "mime_mail.inc" 檔案

    class mime_mail {

        var $parts;
        var $to;
        var $from;
        var $headers;
        var $subject;
        var $body;

        /*
         *     void mime_mail()
         *     類別建構者
         */

        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])
         *     將附加物（附檔）加入郵件物件
         */

        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)
         *     建立 multipart 郵件的訊息部份
         */

        function build_message($part) {
            $message = $part["message"];
            $message = chunk_split(base64_encode($message));
            $encoding = "base64";
            return "Content-Type: " . $part["ctype"] .
                ($part["name"] ? "; name="".$part["name"].""" : "") .
                "nContent-Transfer-Encoding: $encodingnn$messagen";
        }

        /*
         *     void build_multipart()
         *     建立一封 multipart 郵件
         */

        function build_multipart() {
            $boundary = "b" . md5(uniqid(time()));
            $multipart = "Content-Type: multipart/mixed; " .
                     "boundary = $boundarynn" .
                     "This is a MIME encoded message.nn--$boundary";

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

            return $multipart . "--n";
        }

        /*
         *     string get_mail()
         *     傳回已組合完成的郵件
         */

        function get_mail($complete = true) {
            $mime = "";
            if (!empty($this->from))
                $mime .= "From: " . $this->from . "n";
            if (!empty($this->headers))
                $mime .= $this->headers . "n";

            if ($complete) {
                if (!empty($this->to))
                    $mime .= "To: $this->ton";
                if (!empty($this->subject))
                    $mime .= "Subject: $this->subjectn";
            }

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

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

            return $mime;
        }

        /*
         *     void send()
         *     寄出這封信（最後一個被呼叫的函式）
         */

        function send() {
            $mime = $this->get_mail(false);
            mail($this->to, $this->subject, "", $mime);
        }

    }  // 類別結束

?>
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