如何在PHP邮件中添加消息体

我想在邮件正文中添加消息文本，但是做不到。当我添加$mail->Body="Blablabla"到我的代码，它不读取变量。我必须使用另一个标题吗?有些资源会很好

EDİT:当我写这个时:

   $content = '<div style="background: #eee; padding: 10px; font-size: 14px">Bu bir test e-posta''dır..</div>';
    $mail->MsgHTML($content);

在$mail->Body = $ical;之前没有日历，但它打印字符串。但是如果我把代码放在后面，它打印所有的ical代码。

    $venue = $place1;
    $start = $tarih_duzen;
    $start_time = $rz_baslama_saat;
    $end = $tarih_duzen_bit;
    $end_time = $rz_bit_saat;
    $status = 'TENTATIVE';
    $sequence = 0;
    $event_id = 1234;
    //$event['description'] = "<table border=1><tr><td>qqqq</td></tr><table>";
    //PHPMailer
    $mail = new PHPMailer();
    $mail->isSMTP();
    $mail->SMTPDebug = 0;
    $mail->Host = '127.0.0.1';  // Specify main and backup server
    $mail->SMTPAuth = true;                               // Enable SMTP authentication
    $mail->Username = 'someuser';                            // SMTP username
    $mail->Password = 'somepassword';
    $mail->Port = 25;
    $mail->IsHTML(true);
    $mail->setFrom( "aa", 'Lâv');
    $mail->addReplyTo( "aa", 'Lâv');
    $mail->addAddress($email, $isim_etkinlik_katilimcilar);
    $mail->ContentType = 'text/calendar';
    $mail->Subject = "Oluşturulan Etkinlik";

    //$mail->addCustomHeader('MIME-version',"1.0");
    $mail->addCustomHeader('Content-type',"text/calendar; method=REQUEST;");
    $mail->CharSet = 'iso-8859-9';
    //$mail->addCustomHeader('Content-Transfer-Encoding',"7bit");
    //$mail->addCustomHeader('X-Mailer',"Microsoft Office Outlook 12.0");
    //$mail->addCustomHeader("Content-class: urn:content-classes:calendarmessage");


    $ical = "BEGIN:VCALENDAR'r'n";
    $ical .= "VERSION:2.0'r'n";
    $ical .= "PRODID:-//YourCassavaLtd//EateriesDept//EN'r'n";
    $ical .= "METHOD:REQUEST'r'n";
    $ical .= "BEGIN:VEVENT'r'n";
    $ical .= "ORGANIZER;SENT-BY='"MAILTO:'$email''":MAILTO:'$email''r'n";
    $ical .= "ATTENDEE;CN= $etkinligi_yapan_mail;ROLE=REQ-PARTICIPANT;PARTSTAT=ACCEPTED;RSVP=TRUE:mailto: $etkinligi_yapan_mail'r'n";
    $ical .= "UID:".strtoupper(md5($event_id))."-kaserver.com'r'n";
    $ical .= "SEQUENCE:".$sequence."'r'n";
    $ical .= "STATUS:".$status."'r'n";
    $ical .= "DTSTAMPTZID=Africa/Nairobi:".date('Ymd').'T'.date('His')."'r'n";
    $ical .= "DTSTART:".$start."T".$start_time."'r'n";
    $ical .= "DTEND:".$end."T".$end_time."'r'n";
    $ical .= "LOCATION:".$venue."'r'n";
    $ical .= "SUMMARY:".$summary."'r'n";
    //$ical .= "DESCRIPTION:".$meeting_des."'r'n";
    $ical .= "BEGIN:VALARM'r'n";
    $ical .= "TRIGGER:-PT15M'r'n";
    $ical .= "ACTION:DISPLAY'r'n";
    $ical .= "DESCRIPTION:Reminder'r'n";
    $ical .= "END:VALARM'r'n";
    $ical .= "END:VEVENT'r'n";
    $ical .= "END:VCALENDAR'r'n";
    $mail->Body = $ical;
    //send the message, check for errors
    if(!$mail->send()) {
        echo "Mailer Error: " . $mail->ErrorInfo;
        return false;
    } else {
        echo "Message sent!";
        return true;
    }}
    ?>