Buongiorno a tutti,

devo implementare in un form il controllo CAPTCHA per questi maledetti spamm.

Purtroppo però non riesco ad implementare il codice. Vi posto il codice:

Codice PHP:
<?

if ($ok=='invia')  {
            $query="INSERT INTO `text`( `user`, `email`, `testo`, `id_categ` ) VALUES ( '$user', '$email', '$testo', '$categ' ) ";
                //echo $query;
                
                if (mysql_query($query)){
                header("location:ok.php");
                }else{
                header("location:ko.php");
         }
}
?>

<? if ((isset($cat)) AND (!isset($ok))) { ?>
                <form name="form1" method="post" action="inssms.php">
                          
                    
              

<font size="2" face="Arial, Helvetica, sans-serif">Nick*: 
                <input name="user" type="text" id="user" size="10" maxlength="10">
                      

                Email: 
                <input name="email" type="text" id="email" size="20" maxlength="30">
                      

                Messaggio*: 
                <input name="testo" type="text" id="testo" size="40" maxlength="255">
                      

                Categoria* 
                <select name="categ" >
                        <?  $query1="SELECT * FROM `categ` ORDER BY id DESC";
                        $rez1=mysql_query($query1);
                        while ($row1=mysql_fetch_array($rez1))
                        {
                            echo "<option value=\"$row1[categ]\"";
                            if ($cat==$row1[categ]) {
                                            echo " selected ";
                                            };
                            echo ">$row1[categ]</option>";                        
                        };
                    ?>
                      </select>
                      

                      <input name="ok" type="submit" id="ok" value="invia">
                      <input name="cancella" type="reset" id="cancella" value="cancella">
                      </font> </p>
</form>
                
<?                } ?>
Mentre il codice chaptcha da inserire è il seguente:

<?php
require_once('recaptchalib.php');
$publickey = "your_public_key"; // you got this from the signup page
echo recaptcha_get_html($publickey);
?>


L'ho inserito all'interno dei tag <form></form> ma nulla. se compilo i moduli e non considero il codice captcha e clicco invia le informazioni vengono inserite ugualmente.

Come mai?

grazie mille