Start to build out browse functionality [WIP]

Toward #72.

business.php

@@ -0,0 +1,48 @@
+<?php
+
+/*
+ * If no business ID has been passed in the URL
+ */
+if (!isset($_GET['id']))
+{
+    header($_SERVER["SERVER_PROTOCOL"]." 400 Bad Request", true, 400);
+    exit();
+}
+
+/*
+ * If the business ID has an invalid format
+ */
+elseif (strlen($_GET['id'] != 9))
+{
+    header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found", true, 404);
+    exit();
+}
+
+$id = $_GET['id'];
+
+/*
+ * Query our own API 
+ */
+$api_url = 'https://vabusinesses.org/api/business/' . $id;
+$business_json = get_file_contents($api_url);
+
+$business = json_decode($business_json);
+if ($business === FALSE)
+{
+    header($_SERVER["SERVER_PROTOCOL"]." 500 Internal Server Error", true, 500);
+    exit();
+}
+
+/*
+ * Display a table of all field values
+ */
+echo '<table>';
+foreach ($business as $field_name => $field_value)
+{
+    echo '<tr><td>';
+    echo $field_name;
+    echo '</td><td>';
+    echo $field_value;
+    echo '</td></tr>';
+}
+echo '</table>';