Validate that a string starts with specified numbers then a certain number of digits

$output = preg_replace( '/[^0-9]/', '', $string );

How can I change the above line to only accept 11 digit long numbers that must start with either 01, 02, 03, 05, 07 or 08, but NOT 04, 06, 09?

Use following pattern:

 /^0[123578]{1}[0-9]{9}$/