Grab MAC From ARP Table With PHP
Cool function you can use on your local network to lookup a devices MAC address, (assuming the device is on your network), using PHP.
For a big company, either look in the remote locations router, or your core router.
// ============================================= // getmac(Device IP, Router, SNMP Read Community) // Michael Requeny -- http://michael.requeny.com // - Looks up remote devices MAC // - SNMP to routers ARP table // - Converts MAC from HEX to ASCII // - Inserts : seperators // ============================================= function getmac($ip, $router, $snmpread) { $oid = ".1.3.6.1.2.1.3.1.1.2"; $mac = snmprealwalk($router, $snmpread, $oid, 1000000 ,10); // load up array keys for lookups $keys = array_keys($mac); foreach ($keys as $key) { // if needle contains IP && needle = IP // this prevents srch for 10.254.254.1 returning // multiple values (like .1, .11, .111, etc. if (strstr($key,$ip) == $ip) { $mackey = $key; } } $mac = trim(str_replace('Hex-STRING: ', '', $mac)); $mac = str_replace(' ', ':', $mac); return $mac; }