Salve sono qua a chiedere aiuto ancora una volta. Ho inserito in un form il recaptcha di Google e l'ho provato su server locale. La cosa strana e che quando ricevo l'email con i dati inseriti nel form dall'utente mi arrivano anche i dati del recaptcha.
Per essere più chiaro posto il risultato:

Dati Utente
IP Address : 127.0.0.1
Nome : nero
Cognome : wolfe
Email : miamail@gmail.com
Verifica : miamail@gmail.com
Citta :
Professione :
FormPrivacy : confermato
Risposta : verde
Recaptcha Challenge Field : 03AHJ_VutTacncr9CWiGH3HQKXHA2GQXFpAG6FF7laW2DAn_Ml yEIXWKiEK5CoOCZuFxNDxSy9POfznBOrQr61Rl0GT80N7X1pyg BSiERmMzCYj7oLKa5ATQrfUbMyMzEviB-NztO9yi72EnuHz9tBTegMJKD5vB-yZw
Recaptcha Response Field : for tslling[/SIZE] [/SIZE] Non sò se questo è normale.

Per maggiore chiarezza inserisco lo script php
Codice PHP:
<?php
require_once('recaptchalib.php');
$privatekey "mia privatekey";
$publickey "miapublickey";
if (isset(
$_POST['recaptcha_response_field']))
{
   
$response recaptcha_check_answer($privatekey$_SERVER['REMOTE_ADDR'], $_POST['recaptcha_challenge_field'], $_POST['recaptcha_response_field']);
   if (!
$response->is_valid)
   {
      die (
"The reCAPTCHA wasn't entered correctly. Go back and try it again." "(reCAPTCHA said: " $response->error ")");
   }
}
?>
<?php
   
function ValidateEmail($email)
   {
      
$pattern '/^([0-9a-z]([-.\w]*[0-9a-z])*@(([0-9a-z])+([-\w]*[0-9a-z])*\.)+[a-z]{2,6})$/i';
      return 
preg_match($pattern$email);
   }

   if(
$_SERVER['REQUEST_METHOD'] == 'POST')
   {
      
$mailto 'mia@mail';
      
$mailfrom = isset($_POST['email']) ? $_POST['email'] : $mailto;
      
$subject 'Nuovo Iscritto';
      
$message 'Dati Utente';
      
$success_url './conferma.html';
      
$error_url '';
      
$error '';
      
$mysql_server '127.0.0.1';
      
$mysql_database 'db_form';
      
$mysql_table 'dati';
      
$mysql_username 'root';
      
$mysql_password '';
      
$autoresponder_from 'noreplay@miamail';
      
$autoresponder_subject ' ';
      
$autoresponder_message '';
      
$eol "\n";
      
$max_filesize = isset($_POST['filesize']) ? $_POST['filesize'] * 1024 1024000;
      
$boundary md5(uniqid(time()));

      
$header  'From: '.$mailfrom.$eol;
      
$header .= 'Reply-To: '.$mailfrom.$eol;
      
$header .= 'MIME-Version: 1.0'.$eol;
      
$header .= 'Content-Type: multipart/mixed; boundary="'.$boundary.'"'.$eol;
      
$header .= 'X-Mailer: PHP v'.phpversion().$eol;
      if (!
ValidateEmail($mailfrom))
      {
         
$error .= "The specified email address is invalid!\n
"
;
      }

      if (!empty(
$error))
      {
         
$errorcode file_get_contents($error_url);
         
$replace "##error##";
         
$errorcode str_replace($replace$error$errorcode);
         echo 
$errorcode;
         exit;
      }

      
$internalfields = array ("submit""reset""send""captcha_code");
      
$message .= $eol;
      
$message .= "IP Address : ";
      
$message .= $_SERVER['REMOTE_ADDR'];
      
$message .= $eol;
      foreach (
$_POST as $key => $value)
      {
         if (!
in_array(strtolower($key), $internalfields))
         {
            if (!
is_array($value))
            {
               
$message .= ucwords(str_replace("_"" "$key)) . " : " $value $eol;
            }
            else
            {
               
$message .= ucwords(str_replace("_"" "$key)) . " : " implode(","$value) . $eol;
            }
         }
      }

      
$body  'This is a multi-part message in MIME format.'.$eol.$eol;
      
$body .= '--'.$boundary.$eol;
      
$body .= 'Content-Type: text/plain; charset=ISO-8859-1'.$eol;
      
$body .= 'Content-Transfer-Encoding: 8bit'.$eol;
      
$body .= $eol.stripslashes($message).$eol;
      if (!empty(
$_FILES))
      {
          foreach (
$_FILES as $key => $value)
          {
             if (
$_FILES[$key]['error'] == && $_FILES[$key]['size'] <= $max_filesize)
             {
                
$body .= '--'.$boundary.$eol;
                
$body .= 'Content-Type: '.$_FILES[$key]['type'].'; name='.$_FILES[$key]['name'].$eol;
                
$body .= 'Content-Transfer-Encoding: base64'.$eol;
                
$body .= 'Content-Disposition: attachment; filename='.$_FILES[$key]['name'].$eol;
                
$body .= $eol.chunk_split(base64_encode(file_get_contents($_FILES[$key]['tmp_name']))).$eol;
             }
         }
      }
      
$body .= '--'.$boundary.'--'.$eol;
      
mail($mailto$subject$body$header);
      
$autoresponder_header  'From: '.$autoresponder_from.$eol;
      
$autoresponder_header .= 'Reply-To: '.$autoresponder_from.$eol;
      
$autoresponder_header .= 'MIME-Version: 1.0'.$eol;
      
$autoresponder_header .= 'Content-Type: text/plain; charset=ISO-8859-1'.$eol;
      
$autoresponder_header .= 'Content-Transfer-Encoding: 8bit'.$eol;
      
$autoresponder_header .= 'X-Mailer: PHP v'.phpversion().$eol;
      
mail($mailfrom$autoresponder_subject$autoresponder_message$autoresponder_header);
      
$search = array("ä""Ä""ö""Ö""ü""Ü""ß""!""§""$""%""&""/""\x00""^""°""\x1a""-""\""" ""\\""\0""\x0B""\t""\n""\r""("")""=""?""`""*""'"":"";"">""<""{""}""[""]""~""²""³""~""µ""@""|""<""+""#"".""´""+"",");
      
$replace = array("ae""Ae""oe""Oe""ue""Ue""ss");
      foreach(
$_POST as $name=>$value)
      {
         
$name str_replace($search$replace$name);
         
$name strtoupper($name);
         
$form_data[$name] = $value;
      }
      
mysql_connect($mysql_server$mysql_username$mysql_password) or die('Failed to connect to database server!
'
.mysql_error());
      
mysql_query("CREATE DATABASE IF NOT EXISTS $mysql_database");
      
mysql_select_db($mysql_database) or die('Failed to select database
'
.mysql_error());
      
mysql_query("CREATE TABLE IF NOT EXISTS $mysql_table (ID int(9) NOT NULL auto_increment, DATESTAMP DATE, TIME VARCHAR(8), IP VARCHAR(15), BROWSER TINYTEXT, PRIMARY KEY (id)) TYPE=MyISAM");
      foreach(
$form_data as $name=>$value)
      {
         
mysql_query("ALTER TABLE $mysql_table ADD $name VARCHAR(255)");
      }
      
mysql_query("INSERT INTO $mysql_table (DATESTAMP, TIME, IP, BROWSER)
                   VALUES ('"
.date("Y-m-d")."',
                   '"
.date("G:i:s")."',
                   '"
.$_SERVER['REMOTE_ADDR']."',
                   '"
.$_SERVER['HTTP_USER_AGENT']."')")or die('Failed to insert data into table!
'
.mysql_error()); 
      
$id mysql_insert_id();
      foreach(
$form_data as $name=>$value)
      {
         
mysql_query("UPDATE $mysql_table SET $name='".mysql_real_escape_string($value)."' WHERE ID=$id") or die('Failed to update table!
'
.mysql_error());
      }
      
mysql_close();
      
header('Location: '.$success_url);
      exit;
   }
?>
e il relativo html almeno la parte Java e la parte eco del recaptcha:

codice:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script type="text/javascript">
<!--
function Validateform(theForm)
{
   var regexp;
   regexp = /^[A-Za-zƒŠŒŽšœžŸÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ \t\r\n\f]*$/;
   if (!regexp.test(theForm.formboxNome.value))
   {
      alert("Campo nome obbligatorio");
      theForm.formboxNome.focus();
      return false;
   }
   if (theForm.formboxNome.value == "")
   {
      alert("Campo nome obbligatorio");
      theForm.formboxNome.focus();
      return false;
   }
   regexp = /^[A-Za-zƒŠŒŽšœžŸÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ \t\r\n\f\']*$/;
   if (!regexp.test(theForm.formboxCognome.value))
   {
      alert("Campo cognome obbligatorio");
      theForm.formboxCognome.focus();
      return false;
   }
   if (theForm.formboxCognome.value == "")
   {
      alert("Campo cognome obbligatorio");
      theForm.formboxCognome.focus();
      return false;
   }
   regexp = /^([0-9a-z]([-.\w]*[0-9a-z])*@(([0-9a-z])+([-\w]*[0-9a-z])*\.)+[a-z]{2,6})$/i;
   if (!regexp.test(theForm.formboxemail.value))
   {
      alert("Campo Email obbligatorio");
      theForm.formboxemail.focus();
      return false;
   }
   if (theForm.formboxemail.value == "")
   {
      alert("Campo Email obbligatorio");
      theForm.formboxemail.focus();
      return false;
   }
   regexp = /^([0-9a-z]([-.\w]*[0-9a-z])*@(([0-9a-z])+([-\w]*[0-9a-z])*\.)+[a-z]{2,6})$/i;
   if (!regexp.test(theForm.formboxVerifica.value))
   {
      alert("L'indirizzo Email inserito non corrisponde");
      theForm.formboxVerifica.focus();
      return false;
   }
   if (theForm.formboxVerifica.value == "")
   {
      alert("L'indirizzo Email inserito non corrisponde");
      theForm.formboxVerifica.focus();
      return false;
   }
   if (theForm.formboxVerifica.value != theForm.formboxemail.value)
   {
      alert("L'indirizzo Email inserito non corrisponde");
      theForm.formboxVerifica.focus();
      return false;
   }
   regexp = /^[A-Za-zƒŠŒŽšœžŸÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ \t\r\n\f\']*$/;
   if (!regexp.test(theForm.formboxcitta.value))
   {
      alert("Please enter only letter, whitespace and \"\'\" characters in the \"citta\" field.");
      theForm.formboxcitta.focus();
      return false;
   }
   regexp = /^[A-Za-zƒŠŒŽšœžŸÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ \t\r\n\f]*$/;
   if (!regexp.test(theForm.formboxProfessione.value))
   {
      alert("Please enter only letter and whitespace characters in the \"professione\" field.");
      theForm.formboxProfessione.focus();
      return false;
   }
   if (theForm.formcontrolloPrivacy.checked != true)
   {
      alert("Devi accettare le condizionidella privacy");
      return false;
   }
   regexp = ;
   if (!regexp.test(theForm.formEditbox1.value))
   {
      alert("Colori campo obbligatorio");
      theForm.formEditbox1.focus();
      return false;
   }
   if (theForm.formEditbox1.value == "")
   {
      alert("Colori campo obbligatorio");
      theForm.formEditbox1.focus();
      return false;
   }
   return true;
}
//-->
</script>
<script type="text/javascript">
var RecaptchaOptions = {
   theme: 'white'
};
</script>
</head>
<body>
<div id="container">
<div id="header" style="position:absolute;text-align:left;left:0px;top:5px;width:960px;height:200px;z-index:20;" title="">
</div>
<div id="wb_formExtension1" style="position:absolute;left:87px;top:538px;width:324px;height:138px;z-index:17;">
<?php
echo recaptcha_get_html($publickey);
?>
</form>
</div>
C'è un modo per evitarlo? A me sembra superfluo ricevere tutte quelle righe.