PHP Form issue, subscribe into txt form

Ok so I was working on an RSVP form for a websote, trying to emulate easyletter.php that I downloaded as you can see below. The original basically subscribes and unsubscribes a user from an email newsletter. I want to keep that functionality for this RSVP form. I added "phone", "email" to the vars and to the form as well.
I think the problem is around the lines of

                                else {
            $disp="no";
            $newfile = fopen($filelocation,"a+");
            $add = "%".$name;
            $add = "%".$phone;
            $add = "%".$email;
            fwrite($newfile, $add);
            fclose($newfile);

Where it doesnt write the name, phone and email into the text file called subscribers.txt. I wanted it comma seperated so I could import the entire txt list into excel for easy viewing and printing. I am sure this is an easy fix, can someone help me with this issue please. The whole php is below, it is one inclusive file.


<title>944 Magazine RSVP List</title>
<?php
/*
      EasyLetter 1.2
      This script is part of Onlinetools
      http://www.onlinetools.org/tools/easyletter.php
*/
$vars=explode(",","pw,send,subject,message,name,phone,email,action");
foreach($vars as $v){
if ($HTTP_GET_VARS[$v]!=""){$$v=$HTTP_GET_VARS[$v];}
if ($HTTP_POST_VARS[$v]!=""){$$v=$HTTP_POST_VARS[$v];}
}
# Set the password for the eMail List editor!
$pass="studio944";

# Where is your newsletter located? (For deletion link)
$newsletterlocation="http://www.944.biz/rsvp";

# Name of the datafile
$filelocation="subscribers.txt";

# Title of the newsletter, will be displayed in the FROM field of the mailclient
$lettername="944 RSVP";

# Your email, will be the reply-to mail,
$youremail="mitch@944.biz";

# pattern for filtering out own emails
$pattern = "bar.com";

$welcomemessage = "<center>RSVP for the latest parties, events and gigs from 944 Magazine</center>";

# Sorrymessage for failed subscription, will be followed by the email!
$sorrysignmessage = "<div class=\"warning\">Sorry, but there is already an entry for $email</div>";

# Sorrymessage for blank email
$sorryblankmailmessage = "<div class=\"warning\">Sorry, but with a blank mail I get lost in cyberspace</div>";

# Sorrymessage for invalid emails
$sorryoddmailmessage = "<div class=\"warning\">Sorry, but \"$email\" that does not look like an email to me</div>";

# Sorrymessage if someone entered your own mail
$sorryownmailmessage = "<div class=\"warning\">Sorry, but I don't really want to get my own RSVP!</div>";

# Subscribemessage, will be shown when someone subscribes.
$subscribemessage = "<div class=\'thanks\'>Thank you for your RSVP, a confirmation email is on its way! You may close this window now.</div>";

# Subscribemail, will be sent when someone subscribes.
$subscribemail = "Thank you for the RSVP to the 944 Magazine event.";

# Unsubscribemessage for deletion, will be followed by the email!
$unsubscribemessage = "<div class=\"thanks\">We deleted the email. We are sorry to see you go. You can always rejoin at a later date. You may close this window now.</div>";

# Unsubscribemessage for failed deletion, will be followed by the email!
$failedunsubscriptionmessage = "<div class=\"warning\">Sorry, you cannot unsubscribe as we didn't find an entry for $email. You may close this window now.</div>";

if (!file_exists($filelocation)) {
      $newfile = fopen($filelocation,"w+");
      fclose($newfile);
      }
$newfile = fopen($filelocation,"r");
$content = fread($newfile, filesize($filelocation));
fclose($newfile);
$content=stripslashes($content);
$out="";
$lines = explode("%",$content);
foreach($lines as $l){
      if ($l != $email){$out .= "%".$l;}
      else{$found=1;}
}
if ($action=="sign"){                  
      if ($found==1 or $email=="" or !checkmail($email) or preg_match("/".$pattern."/",$email)){
            if ($email==""){echo $sorryblankmailmessage;}
            else if ($found==1){echo $sorrysignmessage;}
            else if (!checkmail($email)){echo $sorryoddmailmessage;}
            else if (preg_match("/".$pattern."/",$email)){echo $sorryownmailmessage;}
            $disp="yes";
      }
      else {
            $disp="no";
            $newfile = fopen($filelocation,"a+");
            $add = "%".$name;
            $add = "%".$phone;
            $add = "%".$email;
            fwrite($newfile, $add);
            fclose($newfile);
            echo $subscribemessage;
            mail ($youremail,"New RSVP subscriber.",$email."\nDelete? $newsletterlocation?action=delete&email=".$email,"From: RSVP\nReply-To: $email\n");
            $submailheaders = "From: $lettername subscription form\n";
            $submailheaders .= "Reply-To: $youremail\n";
            mail ($email,$lettername." subscription",$subscribemail,$submailheaders);
      }
}
if ($action=="delete"){            
      $disp="no";
      if ($found == 1){
            $newfile = fopen($filelocation,"w+");
            fwrite($newfile, $out);
            fclose($newfile);
            echo $unsubscribemessage;
            $disp="no";
      }
      if ($found != 1){
            echo $failedunsubscriptionmessage;
            $disp="YES";
      }
}
if ($pw      == $pass){
      if ($send != "yes" && $send != "test"){
            print'<form method="post"><input type="hidden" name=pw value='.$pass.' /><input type="hidden" name="send" value="yes">
            <br /><b>RSVP editor:</b><br /><br />
            Subject:<br />
            <input type="text" class="input" name="subject" size="20"><br />
            Message:<br />
            <textarea cols="50" rows="10" class="input" wrap="virtual" name="message"></textarea>&#160;
            <input type="submit" value="send" />
            </form>';
      }
      $mailheaders = "From: $lettername\n";
      $mailheaders .= "Reply-To:$youremail\n";

# If you want to send HTML mail, uncomment this line!
$mailheaders .= "Content-Type: text/html; charset=iso-8859-1\n";
      if ($send == "yes"){
            $message="".stripslashes($message);
            $subject=stripslashes($subject);
            $lines = explode("%",$content);
            foreach ($lines as $l){mail ($l,$subject,$message,$mailheaders);}
            print "<b>The following email has been sent!</b>";
            print "<pre>$mailheaders\n$subject\n$message</pre>";
      }
}
if ($pw != $pass && $disp != "no"){
      
      print $welcomemessage;
      print'
      <center><form method="post">
      Your name:&#160;<input type="text" name="name" class="inputsmall" value="" size="20" />&#160;<br>
      Your phone #:&#160;<input type="text" name="phone" class="inputsmall" value="" size="20" />&#160;<br>
      Your email:&#160;<input type="text" name="email" class="inputsmall" value="" size="20" />&#160;<br>
      <input type="radio" name="action" value="sign" checked="checked" />subscribe
      <input type="radio" name="action" value="delete" />unsubscribe&#160;
      <p><input type="submit" value=" Send! " class="button" /> </center>
      </form>
      ';


}
print "<!-- RSVP by Mitch Palmer -->";

function checkmail($string){
      return preg_match("/^[^\s()<>@,;:\"\/\[\]?=]+@\w[\w-]*(\.\w[\w-]*)*\.[a-z]{2,}$/i",$string);
}
?>

<body bgcolor="#CCCCCC" text="#000000">