next_bind_serial builder

next_bind_serial.php

<?php

class OutOfSerialsException extends Exception {}

function next_bind_serial($serial) {
	$today = date("Ymd");

	for ($i = 0; $i < 100; $i++) {
		$new_serial = $today.sprintf("%02d",$i);
		if ($serial < $new_serial) {
			return $new_serial;
		}
	}

	throw new OutOfSerialsException;
}

$serial = "2012111902";

echo next_bind_serial($serial);