Liste deroulant en php

bonjour jaimerais que vous m'aider a faire un projet je veux recupere administrateur et utilisateur dans mon BD.
<?php
include("connection.php");
//menu deroulant
if(isset($_GET['groupe'])){
$req="SELECT * FROM user WHERE groupeuser='".$_GET['groupe']."'";
$resul=mysql_query($req); }
else{
$req="SELECT groupeuser FROM user";
$resul=mysql_query($req);
}

?>
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Document sans titre</title>
</head>

<body>
<fieldset>
<legend> <h1>Inscription</h1></legend>
<form method="post" enctype="multipart/form-data" action="inscription.php">
<label>Nom:</label>
<input type="text" name="nm" required="true"/> <br/>
<label>Prenom:</label>
<input type="text" name="prnm" required="true"/> <br/>
<label>Login:</label>
<input type="text" name="lgin" required="true"/> <br/>
<label>Password:</label>
<input type="text" name="passwrd" required="true"/> <br/>
<label>Confirmation Password:</label>
<input type="text" name="confirpasswrd" required="true"/> <br/>
<label>Profil</label>
<?php while($recup=mysql_fetch_array($resul)){?>
<select name="profil">
<option value="<?php echo $recup['administrateur'];?>"> <?php echo $recup['utilisateur'];?></option>
<?php }?>
</select><br><br>
<label>Photo</label>
<input type="file" name="photo"/><br><br/>
<input type="submit" name="bouton" value="Enregistrer"/>
<input type="submit" name="bouton" value="Annuler" onclick="self.history.back();"/>
</form>
</fieldset>
</body>
</html>