reverted PHP version thet works with MySQL 5.7

html/functions.php

@@ -1,5 +1,7 @@
 <?php
 
+global $db;
+
 /// Send Error To Client
 /** @return error message from server to client
 
@@ -13,6 +15,10 @@
     }
     @endcode */
 function error($txt) {
+  error_log("**** ERROR: ".$txt);
+  if (isset($db) && is_object($db)) {
+    error_log("**** DATABASE ERROR: ".$db->error);
+  }
   echo json_encode(array('success' => false, 'txt' => $txt));
   exit;
 }
@@ -83,4 +89,4 @@ EOT;
   }
 }
 
-?>
+?>