Ficheros 11: Subir un fichero de tu ordenador local al servidor

<?php
if (isset($_FILES['logo']['name'])) {
move_uploaded_file($_FILES['logo']['tmp_name'], "./imagenes/".$_FILES['logo']['name']);

}
else { ?>
<form method="post" action="subir_imagen.php" enctype="multipart/form-data"><br>
<input type=file size=60 name="logo" id="logo"><br><br>
<input type=submit value="subir"><br>
</form>
<?php
}
?>