ipreg/functions.php

<?php
	// strip mac address to 12 char string
	function strip_mac($mac) {
		$mac = str_replace('-', '', $mac);
		$mac = str_replace(':', '', $mac);
		$mac = str_replace('.', '', $mac);
		$mac = str_replace(',', '', $mac);
		$mac = str_replace(' ', '', $mac);
		$mac = strtoupper($mac);
		
		return ($mac);
	}
	
	// rebuild mac address
	function write_mac($mac) {
		if (strlen($mac)!=12) {
			// if the MAC is empty, or for whatever reason incorrect, just return
			return $mac;
		} else {
			// length is good, continue
			$mac1 = substr($mac, 0, 2);
			$mac2 = substr($mac, 2, 2);
			$mac3 = substr($mac, 4, 2);
			$mac4 = substr($mac, 6, 2);
			$mac5 = substr($mac, 8, 2);
			$mac6 = substr($mac, 10, 2);
			
			// check session for preference (if 0, do nothing), if changed: update useredit.php too!
			if ($_SESSION['suser_mac']==1) {
				$mac = $mac1 . '-' . $mac2 . '-' . $mac3 . '-' . $mac4 . '-' . $mac5 . '-' . $mac6;
			} else if ($_SESSION['suser_mac']==2) {
				$mac = $mac1 . ':' . $mac2 . ':' . $mac3 . ':' . $mac4 . ':' . $mac5 . ':' . $mac6;
			} else if ($_SESSION['suser_mac']==3) {
				$mac = $mac1 . $mac2 . $mac3 . '-' . $mac4 . $mac5 . $mac6;
			}
			
			return $mac;
		}
	}
	
	// redirect page
	function header_location($location) {
		header("location: " . $location);
		exit;
	}
?>