How to get the server MAC address in PHP development?

MAC (Media access control or medium access control) address, which is a translation of media access controls, or physical addresses, hardware addresses, to define the location of network devices. how to get the Mac(Media Access Control) address in PHP , see the following code:

Forlinux ();                           Break                           Case "Solaris": Break;                            Case "UNIX": break;                            Case "Aix": Break;                                      Default: $this->forwindows ();                             Break                   } $temp _array = Array (); foreach ($this->return_array as $value) {if (Preg_match ("/[0-9a-f][0-9a-f] [:-]"." [0-9a-f] [0-9a-f] [:-]"." [0-9a-f] [0-9a-f] [:-]"." [0-9a-f] [0-9a-f] [:-]"." [0-9a-f] [0-9a-f] [:-]"." [0-9a-f]                                      [0-9a-f]/i ", $value, $temp _array)) {$this->mac_addr = $temp _array[0];                            Break                 }            } unset ($temp _array);              return $this->mac_addr; } function Forwindows () {@exec ("Ipconfig/all", $this->return_array)                   ;                   if ($this->return_array) return $this->return_array; else{$ipconfig = $_server["windir"]. "                            \system32\ipconfig.exe ";                            if (Is_file ($ipconfig)) @exec ($ipconfig. "/all", $this->return_array); else @exec ($_server["windir"]. "                            \system\ipconfig.exe/all ", $this->return_array);                   return $this->return_array; }} function Forlinux () {@exec ("ifconfig-a", $t                   His->return_array);         return $this->return_array;     }}//method using $mac = new Getmacaddr (php_os); echo $mac->mac_addr;?>

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How to get the server MAC address in PHP development?