<?php

require_once 'bootstrap.php';

$id = dbGetVal("select id from df_locations where address='".dbEscape($_POST['location']['adr'])."'");
if($id){ 
  echo $id;
  exit;
}

dbInsert('df_locations', array(
  'address' => formatAddress($_POST['location']['adr']),
  'latitude' => $_POST['location']['lat'],
  'longitude' => $_POST['location']['lng'],
));

echo dbGetInsertId();