risposta automatica email

[neko86]

salve ragazzi sono nuovo,premetto che ho usato il tasto cerca ma non sono riuscito a risolvere nulla a me servirebbe,gentilmente,il codice per una risposta automatica tramite email, da inviare a un'utente che si iscrive alla newsletter vi scrivo il pezzo di codice che posseggo:
grazie mille

<?php
/** Hi, please change line 9 with your email address */
?>

<?php
/** NOTE: Be sure to change the name of the txt file to something more secure and update it below, if you change name, also renames subscribers.txt file.*/
$subscribersList = "subscribers.txt";
/** enter your email address.  You will receive a notification email when a user subscribes to your list*/
$adminEmail = "hakim93@hotmail.it";

/** do not edit anything below unless you know what you're doing*/
function GetField($input) {
    $input=strip_tags($input);
    $input=str_replace("<","<",$input);
    $input=str_replace(">",">",$input);
    $input=str_replace("#","%23",$input);
    $input=str_replace("'","`",$input);
    $input=str_replace(";","%3B",$input);
    $input=str_replace("script","",$input);
    $input=str_replace("%3c","",$input);
    $input=str_replace("%3e","",$input);
    $input=trim($input);
    return $input;
} 

/**E-mail Validation*/
function validEmail($emailtext)
{
   $isValid = true;
   $atIndex = strrpos($emailtext, "@");
   if (is_bool($atIndex) && !$atIndex)
   {
      $isValid = false;
   }
   else
   {
      $domain = substr($emailtext, $atIndex+1);
      $local = substr($emailtext, 0, $atIndex);
      $localLen = strlen($local);
      $domainLen = strlen($domain);
      if ($localLen < 1 || $localLen > 64)
      {
         $isValid = false;
      }
      else if ($domainLen < 1 || $domainLen > 255)
      {
         $isValid = false;
      }
      else if ($local[0] == '.' || $local[$localLen-1] == '.')
      {
         $isValid = false;
      }
      else if (preg_match('/\\.\\./', $local))
      {
         $isValid = false;
      }
      else if (!preg_match('/^[A-Za-z0-9\\-\\.]+$/', $domain))
      {
         $isValid = false;
      }
      else if (preg_match('/\\.\\./', $domain))
      {
         $isValid = false;
      }
      else if
(!preg_match('/^(\\\\.|[A-Za-z0-9!#%&`_=\\/$\'*+?^{}|~.-])+$/',
                 str_replace("\\\\","",$local)))
      {
         if (!preg_match('/^"(\\\\"|[^"])+"$/',
             str_replace("\\\\","",$local)))
         {
            $isValid = false;
         }
      }
   }
   return $isValid;
}

$emailtext     = GetField($_GET['emailtext']);
$pass     = validEmail($emailtext);

if ($pass) {
    $f = fopen($subscribersList, 'a+');
    $read = fread($f,filesize($subscribersList));
    If (strstr($read,"@")) {
        $delimiter = ";";
    }
    if (strstr($read,$emailtext)) { 
        echo 3;
    } else {
        fwrite($f, $delimiter . $emailtext);
        $to      = $adminEmail;
        $subject = 'A new user has subscribed to your list';
        $message = $emailtext;
        mail($to, $subject, $message);
    echo 1;
    }
    fclose($f);
} else {
    echo 2;
}


$a = $emailtext;
$b = "Risposta di ringraziamento generata automaticamente...";
$c = "Grazie per aver partecipato al nostro.....ect ect ect";
$d = "messaggio inviato dal sito bla bla bla";
mail ($a, $b, $c, $d);



?>