[SOLVED] Encrypting Numbers

[stormx]

On my client portal, I am creating a page where users can see their credit card details.

 

At the moment it just echoes’s the whole credit card number from the database eg: 1234123412345678

 

Is there a way to just echo the last 4 digits in the form of ************5678 for obvious privacy reasons?

 

The script to get the credit card number from the database is <?php echo $user['ccnumber']; ?>

 

So is there any way to just echo the last 4 digits?

 

Thanks.

 

[Psycho]

substr($cc_number, -4);