Как повторить повторяющийся счет на х количество дней, а затем он останавливается

Я пытаюсь обновить настройки (Recurring Invoice), но у меня возникли небольшие проблемы.

Я пытаюсь сделать это, где я делаю это …

1. введите дату (которая является начальной датой повторения)
2. введите, как это будет повторяться (еженедельно. Би-еженедельно и т. д.)
3. это где проблема начинается для меня …. (введите, сколько раз он будет повторяться, а затем остановить повторяющийся счет)
   .. заранее спасибо

<?php require 'initapp.php'; $self='invoice-recurring.php'; $rself='all-recurring-invoice.php'; if (isset($_POST['submit'])){

$cid = _post('client');
if ($cid=='' OR $cid=='0'){
conf($self,'e','Client Name is Required.');
}
$idate = _post('date');
$date=date("Y-m-d", strtotime($idate));

if ($date==''){
conf($self,'e','Date is Required.');
}

$item = _post('item');
if ($item==''){
conf($self,'e','Item Name is Required.');
}

$note = _post('note');
$note=html_entity_decode($note);
$recurring = _post('frequency');
if ($recurring==''){
conf($self,'e','Frequency is Required.');
} //starts added on 3-7-2015 //$occurance = _post('occurance'); // if ($occurance==''){ //      conf($self,'e','Occurance is Required.'); //  } //stops

$price= _post('price');
if ($price==''){
conf($self,'e','Price is Required.');
}

$discount=_post('discount');

$disc_calculate=($discount*$price/100);

$tax=_post('tax'); if ($tax!='0'){ $tax = ORM::for_table('taxes')->find_one($tax); $trate = $tax['rate']; $tname = $tax['name']; $ttype = $tax['type']; if ($ttype=='Excluded'){ $tval = ($price*$trate)/100; $intotal = $price+$tval;

}
else {
$tval = ($price*$trate)/100;
$intotal = $price-$tval;
}
}
else{
$intotal=$price;
$tval='0';
$tname='None';
}$created = $date;
$add_days =$recurring;
$paiddate = date('Y-m-d',strtotime($date) + (24*3600*$add_days)); //add or delete * $occurance added on 3-7-2015 //$emailnotify='Yes'; $emailnotify = $aclient->emailnotify;//added on 2-25-2015

$intotal=$intotal-$disc_calculate; $paymentmethod=_post('paymentmethod');

$d = ORM::for_table('invoices')->create();
$d->userid = $cid;
$d->iteam = $item;
$d->created = $date;
$d->duedate = $date;
$d->nextduedate=$paiddate;
$d->datepaid=$date;
$d->subtotal = $price;
$d->total = $intotal;
$d->discount = $discount;
$d->paymentmethod=$paymentmethod;
$d->note = $note;
$d->tax=$tval;
$d->taxname=$tname;
$d->status = 'Unpaid';
$d->recurring = $recurring;
//$d->occurance = $occurance;//added on 3-7-2015
$d->save();
$invoiceid= $d->id();

if ($emailnotify=='Yes'){
$sysEmail=appconfig('Email');
$sysCompany=appconfig('CompanyName');
$sysUrl= appconfig('sysUrl');
$d= ORM::for_table('email_templates')->where('tplname', 'Customer Invoice Created')->find_one();
$cl = ORM::for_table('accounts')->find_one($cid);
$name = $cl['name'];
$email = $cl['email'];

$template = $d['message'];
$subject = $d['subject'];
$send = $d['send'];
$data = array('name' => $name,
'logo'=> '<img width="61" height="76" border="0" src="'.$sysUrl.'/assets/uploads/logo.jpg">',
'business_name'=> $sysCompany,
'invoice_id'=> $invoiceid,
'invoice_item'=> $item,
'invoice_amount'=> $intotal,
'sys_url' => $sysUrl
);
$message = _render($template,$data);

$mail_subject = _render($subject,$data);$body = $message;
if ($send=='1'){

$smtp=ORM::for_table('smtp_setting')->find_one('1');
$smtp_status=$smtp['status'];

if($smtp_status!='1'){

require ('../lib/pnp/email/class.phpmailer.php') ;

$mail = new PHPMailer();
$mail->SetFrom($sysEmail, $sysCompany);
$mail->AddReplyTo($sysEmail, $sysCompany);
$mail->AddAddress($email, $name);
$mail->Subject    = $mail_subject;
$mail->MsgHTML($body);
$mail->Send();
}else{
require ('../lib/plugin/PHPMailer/PHPMailerAutoload.php');
$host_name=$smtp['host_name'];
$username=$smtp['username'];
$password=$smtp['password'];
$port=$smtp['port'];

$mail = new PHPMailer;
$mail->isSMTP();                                      // Set mailer to use SMTP
$mail->Host = "$host_name";  // Specify main and backup SMTP servers
$mail->SMTPAuth = true;                               // Enable SMTP authentication
$mail->Username = "$username";                 // SMTP username
$mail->Password ="$password";                           // SMTP password
$mail->SMTPSecure = 'tls';                            // Enable TLS encryption, `ssl` also accepted
$mail->Port = "$port";

$mail->SetFrom($sysEmail, $sysCompany);
$mail->AddReplyTo($sysEmail, $sysCompany);
$mail->AddAddress($email, $name);
$mail->Subject    = $mail_subject;
$mail->MsgHTML($body);
$mail->Send();

}
}

}conf("invoice-manage.php?_inid=$invoiceid",'s','Recurring Invoice Add Successfully'); } conf($self,'e','Invoice does not Create Successfully'); ?>