Helper\Mailer\Smtp::getCommand PHP Method

    protected function getCommand()
    {
        $separator = "----=_Part_" . md5($this->_address . time()) . uniqid();
        //分隔符
        $command = array(array("HELO sendmail\r\n", 250));
        if (!empty($this->_userName)) {
            $command[] = array("AUTH LOGIN\r\n", 334);
            $command[] = array($this->_userName . "\r\n", 334);
            $command[] = array($this->_password . "\r\n", 235);
        }
        //设置发件人
        $command[] = array("MAIL FROM: <" . $this->_address . ">\r\n", 250);
        $header = "FROM: " . $this->_from . "\r\n";
        //设置收件人
        if (!empty($this->_to)) {
            $count = count($this->_to);
            if ($count == 1) {
                $command[] = array("RCPT TO: <" . $this->_to[0] . ">\r\n", 250);
                $header .= "TO: <" . $this->_to[0] . ">\r\n";
            } else {
                for ($i = 0; $i < $count; $i++) {
                    $command[] = array("RCPT TO: <" . $this->_to[$i] . ">\r\n", 250);
                    if ($i == 0) {
                        $header .= "TO: <" . $this->_to[$i] . ">";
                    } elseif ($i + 1 == $count) {
                        $header .= ",<" . $this->_to[$i] . ">\r\n";
                    } else {
                        $header .= ",<" . $this->_to[$i] . ">";
                    }
                }
            }
        }
        //设置抄送
        if (!empty($this->_cc)) {
            $count = count($this->_cc);
            if ($count == 1) {
                $command[] = array("RCPT TO: <" . $this->_cc[0] . ">\r\n", 250);
                $header .= "CC: <" . $this->_cc[0] . ">\r\n";
            } else {
                for ($i = 0; $i < $count; $i++) {
                    $command[] = array("RCPT TO: <" . $this->_cc[$i] . ">\r\n", 250);
                    if ($i == 0) {
                        $header .= "CC: <" . $this->_cc[$i] . ">";
                    } elseif ($i + 1 == $count) {
                        $header .= ",<" . $this->_cc[$i] . ">\r\n";
                    } else {
                        $header .= ",<" . $this->_cc[$i] . ">";
                    }
                }
            }
        }
        //设置秘密抄送
        if (!empty($this->_bcc)) {
            $count = count($this->_bcc);
            if ($count == 1) {
                $command[] = array("RCPT TO: <" . $this->_bcc[0] . ">\r\n", 250);
                $header .= "BCC: <" . $this->_bcc[0] . ">\r\n";
            } else {
                for ($i = 0; $i < $count; $i++) {
                    $command[] = array("RCPT TO: <" . $this->_bcc[$i] . ">\r\n", 250);
                    if ($i == 0) {
                        $header .= "BCC: <" . $this->_bcc[$i] . ">";
                    } elseif ($i + 1 == $count) {
                        $header .= ",<" . $this->_bcc[$i] . ">\r\n";
                    } else {
                        $header .= ",<" . $this->_bcc[$i] . ">";
                    }
                }
            }
        }
        //主题
        $header .= "Subject: =?UTF-8?B?" . $this->_subject . "?=\r\n";
        if (isset($this->_attachment)) {
            //含有附件的邮件头需要声明成这个
            $header .= "Content-Type: multipart/mixed;\r\n";
        } elseif (false) {
            //邮件体含有图片资源的,且包含的图片在邮件内部时声明成这个，如果是引用的远程图片，就不需要了
            $header .= "Content-Type: multipart/related;\r\n";
        } else {
            //html或者纯文本的邮件声明成这个
            $header .= "Content-Type: multipart/alternative;\r\n";
        }
        //邮件头分隔符
        $header .= "\t" . 'boundary="' . $separator . '"';
        $header .= "\r\nMIME-Version: 1.0\r\n";
        //这里开始是邮件的body部分，body部分分成几段发送
        $header .= "\r\n--" . $separator . "\r\n";
        $header .= "Content-Type:text/html; charset=utf-8\r\n";
        $header .= "Content-Transfer-Encoding: base64\r\n\r\n";
        $header .= $this->_body . "\r\n";
        $header .= "--" . $separator . "\r\n";
        //加入附件
        if (!empty($this->_attachment)) {
            $count = count($this->_attachment);
            for ($i = 0; $i < $count; $i++) {
                $header .= "\r\n--" . $separator . "\r\n";
                $header .= "Content-Type: " . $this->getMIMEType($this->_attachment[$i]) . '; name="=?UTF-8?B?' . base64_encode(basename($this->_attachment[$i])) . '?="' . "\r\n";
                $header .= "Content-Transfer-Encoding: base64\r\n";
                $header .= 'Content-Disposition: attachment; filename="=?UTF-8?B?' . base64_encode(basename($this->_attachment[$i])) . '?="' . "\r\n";
                $header .= "\r\n";
                $header .= $this->readFile($this->_attachment[$i]);
                $header .= "\r\n--" . $separator . "\r\n";
            }
        }
        //结束邮件数据发送
        $header .= "\r\n.\r\n";
        $command[] = array("DATA\r\n", 354);
        $command[] = array($header, 250);
        $command[] = array("QUIT\r\n", 221);
        return $command;
    }