Richiamo funzioni per controllo campi e restituzione errori

[Al_katraz984]

Username: <input type="text" name="username" value="<? $username ?>" />

Password: <input type="password" name="password" />

Ripeti Password: <input type="password" name="password2" />

email: <input type="text" name="email" value="<? $email ?>" />

nome: <input type="text" name="nome" value="<? $nome ?>" />

cognome: <input type="text" name="cognome" value="<? $cognome ?>" />

<input type="submit" />

<? $cognome ?> <--- cos'è questo???

prova cosi..

Username: <input type="text" name="username" value="<?php echo $username; ?>" />

Password: <input type="password" name="password" />

Ripeti Password: <input type="password" name="password2" />

email: <input type="text" name="email" value="<?php echo $email; ?>" />

nome: <input type="text" name="nome" value="<?php echo $nome; ?>" />

cognome: <input type="text" name="cognome" value="<?php echo $cognome; ?>" />

<input type="submit" />