Updated with frontend and added new features

associate.php

@@ -0,0 +1,77 @@
+<?php
+
+$message = "";
+  if(isset($_POST['submit'])) {
+
+    $mac = csv_filter($_POST['macaddress']);
+    $name = csv_filter($_POST['name']);
+
+    if($mac != "" && $name != null) {
+      if(is_mac($mac)) {
+        file_put_contents("mac_log.csv","$mac,$name\n",FILE_APPEND);
+        $message = "Registered, thanks! It might take a few minutes for your name to show up.";
+      }
+      else {
+        $message = "The MAC address doesn't look right. MAC addresses look like this: 00:1a:2b:3c:4d:5e";
+      }
+    }
+    else {
+      $message = "Please enter a MAC address and name.";
+    }
+
+  }
+
+
+  function csv_filter($value) {
+    return preg_replace('/[^a-z0-9:]/i','',$value);
+  }
+
+  function is_mac($mac) {
+    if(preg_match('/^([0-9a-f]{2}([:-]|$)){6}$/i',$mac) > 0){
+    return true;}
+    else { return false; }  
+  }
+
+$arp_found = false;
+
+  function arp_lookup($ip) {
+    global $arp_found;
+
+    $arp = shell_exec("/usr/sbin/arp -a | grep $ip");
+    preg_match('/at ([0-9a-f]{2}[: ]){6}/i',$arp,$matches);
+    if(sizeof($matches) > 0) {
+      $mac = split(" ",$matches[0]);
+      $arp_found = true;
+      return $mac[1];
+    }
+    else {
+      $arp_found = false;
+      return "";
+    }
+  }
+include('header-inc.php');
+?>
+  <span class="message">
+  <?php echo $message; ?>
+  </span>
+
+  <div id="content">
+    <h2>Register Your Device</h2>
+    <div class="caption">
+      <form method="post" action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>">
+        <h3>Your computer or mobile device's MAC address can be found under your network info!</h3>
+        <table>
+          <tr><td><label for="name">Your Name:</label></td><td><input type="text" id="name" name="name" /></td></tr>
+          <tr><td><label for="macaddress">MAC Address:</label></td><td><input type="text" id="macaddress" name="macaddress" value="<?php echo arp_lookup($_SERVER['REMOTE_ADDR']); ?>" />
+            <span id="autodetect"><?php if($arp_found) { echo "(Autodetected MAC from IP address ".$_SERVER['REMOTE_ADDR'].")"; } ?></span>
+          </td></tr>
+        </table>
+        <input type="submit" id="submit" name="submit" value="Register" />
+      </form>
+    </div>
+  </div>
+
+</div>
+</body>
+</html>
+