Mascára em php

mask.php

<?

function mask($val, $mask)
{
 $maskared = '';
 $k = 0;
 for($i = 0; $i<=strlen($mask)-1; $i++)
 {
 if($mask[$i] == '#')
 {
 if(isset($val[$k]))
 $maskared .= $val[$k++];
 }
 else
 {
 if(isset($mask[$i]))
 $maskared .= $mask[$i];
 }
 }
 return $maskared;
}

?>

//Exemplo de uso
<?

$cnpj = "11222333000199";
$cpf = "00100200300";
$cep = "08665110";
$data = "10102010";

echo mask($cnpj,'##.###.###/####-##');
echo mask($cpf,'###.###.###-##');
echo mask($cep,'#####-###');
echo mask($data,'##/##/####');

?>

<?

$data = "10102010";

echo mask($data,'##/##/####');
echo mask($data,'[##][##][####]');
echo mask($data,'(##)(##)(####)');

?>