Ho scritto una pagina di registrazione che, apparentemente, sembra funzionare ma, quando premo il tasto "Registrati" mi appare una pagina bianca (/register.php#), non invia nessuna e-mail di attivazione e non salva alcun dato nella tabella del database. Secondo voi qual è l'errore?
Ecco il codice:

Codice PHP:
<?php 
error_reporting
(E_ALL);
    include 
'header.php';
    
?>
    
    <div id="wrapper">
    
    <?php
     

        
if(!isset($_GET['passkey'])){
        
            if(!isset(
$_POST['invia'])){ ?>
            
                <form method="post" action="#" id="formregistrazione" enctype="multipart/form-data">
                    
                    <ul>
                        [*]<label for="nome">Nome</label>
                            <input type="text" name="nome" id="nome" />
                        
                        [*]<label for="cognome">Congnome</label>
                            <input type="text" name="cognome" id="cognome" />
                        
                        [*]<label for="compleanno">Data di nascita</label>
                            <select name="giorno">
                                <option value="" disabled="disabled" selected="selected">Giorno:</option>
                                <?php
                                
                                    
for($i=1;$i<=31;$i++){ ?>
                                    
                                        <option value="<?php echo $i?>"><?php echo $i?></option>
                                        
                                    <?php ?>
                            </select>
                            <select name="mese">
                                <option value="" disabled="disabled" selected="selected">Mese:</option>
                                <?php
                                
                                    
for($i=1;$i<=12;$i++){ ?>
                                    
                                        <option value="<?php echo $mesi[$i]; ?>"><?php echo $mesi[$i]; ?></option>
                                        
                                    <?php ?>
                            
                            </select>
                            <select name="anno">
                                <option value="" disabled="disabled" selected="selected">Anno:</option>
                                <?php
                                
                                    
for($i=1960;$i<=$annoattuale;$i++){ ?>
                                    
                                        <option value="<?php echo $i?>"><?php echo $i?></option>
                                        
                                    <?php ?>
                            
                            </select>
                        
                            <label for="password1">Password</label>
                            <input type="password" name="password1" id="password1" />
                        
                        [*]
                            <label for="password2">Ripeti Password</label>
                            <input type="password" name="password2" id="password2" />
                        
                        [*]
                            <label for="email">E-mail</label>
                            <input type="text" name="email" id="email" />
                        
                        [*]
                            <label for="luogo">Luogo di nascita</label>
                            <input type="text" name="luogo" id="luogo" />
                        
                        [*]
                            <label for="residenza">Dove vivi</label>
                            <input type="text" name="residenza" id="residenza" />
                        
                        [*]<label for="foto">Foto Profilo</label>
                            <input type="file" name="foto" id="foto" />
                        
                    [/list]
                        <input type="submit" name="invia" id="registrati" value="Registrati" />
                </form>
            
    <?php    } else {
                
                
// creazione di un codice di conferma
                
$codiceconferma md5(uniqid(rand()));
                
                
// Valori del form
                
$nome mysql_real_escape_string($_POST['nome']);
                
$cognome mysql_real_escape_string($_POST['cognome']);
                
$giorno mysql_real_escape_string($_POST['giorno']);
                
$mesi mysql_real_escape_string($_POST['mese']);
                
$anno mysql_real_escape_string($_POST['anno']);
                
$password1 mysql_real_escape_string($_POST['password1']);
                
$password2 mysql_real_escape_string($_POST['password2']);
                
$email mysql_real_escape_string($_POST['email']);
                
$luogo mysql_real_escape_string($_POST['luogo']);
                
$residenza mysql_real_escape_string($_POST['residenza']);
                
$foto mysql_real_escape_string($_FILES["foto"]["name"]);
            
                
// controllo campi vuoti e password
                
                
if($email == "" || $nome == "" || $cognome == "" || $giorno == "" || $mesi == "" || $anno == "" || $luogo == "" || $residenza == ""){
                    echo 
"Devi riempire tutti i campi";
                }elseif(
$password1 == "" || $password2 == ""){
                    echo 
"Devi riempire tutti i campi";
                }elseif(
$password2 != $password1){
                    echo 
"Le password devono coincidere";
                }else{
                    
                    
$recuperauseremail mysql_query("SELECT id FROM utenti WHERE nome='$nome' OR email='$email'") or die(mysql_error());    
                    
$contausermail mysql_num_rows($recuperauseremail);
                    
                    if(
$contausermail 0){
                    
                        echo 
"Nome utente o email già disponibili";
                    
                    } else {
                        
                        
// Controllo dell'immagine del profilo                        
                        
if(is_uploaded_file($_FILES['foto']['tmp_name'])){
                            
                            
// Recupera le informazioni dell'immagine
                            
list($width$height$type$attr) = getimagesize($_FILES['foto']['tmp_name']);
                            
                            
// Controlla il peso in byte
                            
if($_FILES['foto']['size'] > 1048576){
                            
                                echo 
"Il file non deve superare 1 MB!";
                                
                            
                            }
                            
// Controlla le dimensioni in px
                            
} elseif (($width 500) || ($height 500)) {
                            
                                echo 
"Le dimensioni non devono superare i 500 px!";
                                
                            
// Controlla che il file sia un'immagine
                            
} elseif (($type != 1) && ($type != 2) && ($type != 3)){
                            
                                echo 
"File non supportato!";
                                
                            
// Controlla se sullo spazio web sia già presente il file
                            
} elseif (file_exsists('upload/'.$_FILES['foto']['name'])){
                            
                                echo 
"File già esistente. Rinominarlo e riprovare!";
                            
                            
                            
                    } else {
                        
                            
// Invia dati alla tb utenti_temp
                        
                            
$inviautentitemp mysql_query("INSERT INTO utenti_temp (codiceconferma, nome, cognome, giorno, mese, anno, password, email, luogo, residenza, foto) VALUES ('$codiceconferma', '$nome', '$cognome', '$giorno', '$mesi', '$anno', '$password2', '$email', '$luogo', '$residenza', '$foto')");
                            
                            if(
$inviautentitemp){
                                
                                
$to=$email;
                                
$subject="Conferma la Registrazione";
                                
$header="Da: Amministratore";
                                
$message="Ecco il tuo codice di attivazione \r\n";
                                
$message.="Clicca sul link per confermare la registrazione \r\n";
                                
$message.="http://knoweveryone.altervista.org/register.php?passkey=$codiceconferma";
                                
                                
$sentmail=mail($to,$subject,$message,$header);
                            
                            }
                            
                            if(
$sentmail){
                            
                                echo 
"Per completare la registrazione controlla la tua casella di posta elettronica e clicca sul link di attivazione.";
                                
                            }else{
                            
                                echo 
"Errore, link di attivazione non inviato.";
                            
                            }
                            
                        }
                    }
                }
                
            }
        
        } else {
            
            
$passkey $_GET['passkey'];
            
            
$sqlrecuperauser "SELECT * FROM utenti_temp WHERE codiceconferma = '$passkey'";
            
$risultatouser mysql_query($sqlrecuperauser);
            
            if(
$risultatouser) {
            
                
$contauser mysql_num_rows($risultatouser);
                
                if(
$contauser == 1){
                
                    
$rows mysql_fetch_array($risultatouser);
                    
$nome $rows['nome'];
                    
$cognome $rows['cognome'];
                    
$giorno $rows['giorno'];
                    
$mesi $rows['mese'];
                    
$anno $rows['anno'];
                    
$email $rows['email'];
                    
$password $rows['password'];
                    
$luogo $rows['luogo'];
                    
$residenza $rows['residenza'];                    
                    
$foto $rows['foto'];

                    
                    
$passwordcript md5($password);
                    
                    
$sqlconfermauser mysql_query("INSERT INTO utenti (nome, cognome, giorno, mese, anno, password, email, luogo, residenza, foto) VALUES ('$nome', '$cognome', '$giorno', '$mesi', '$anno', '$password2', '$email', '$luogo', '$residenza', '$foto')");
                    
                    if (
$sqlconfermauser) {
                    
                        echo 
"Il tuo account è stato attivato con successo";
                        
$sqleliminadati mysql_query("DELETE FROM utenti_temp WHERE codiceconferma = '$passkey'");
                    
                    } else {
                    
                        echo 
"Errore!";
                    
                    }
                
                }
            
            }
            
        }

    
?>
    
    
    </div>
    
    
</body>
</html>
Grazie in anticipo per l'aiuto,
Giuseppe1998.