title: PHP file suddenly stopped working, shows blank page
body: <p>It was working fine just a while ago I was getting JSON response,  which was an array of JSON objects now it shows a blank page ,I have no idea why! Can anyone identify what's the problem here?
    here is the php code:</p>
  
  <pre><code>&lt;?php
  
  
  $host="localhost"; // Host name 
  $username="root"; // Mysql username 
  $password=""; // Mysql password 
  $db_name="tourist"; // Database name 
  
  // Connect to server and select databse.
  $con = mysqli_connect("$host", "$username", "$password","$db_name")or die("cannot connect");
  
  
  if($con){
      mysqli_set_charset($con ,'utf8');
      $qry = "SELECT * FROM places";
      $query=mysqli_query($con ,$qry);       
      if (!$query) {
           $message  = 'Invalid query: ' . mysql_error() . "\n";
           $message .= 'Whole query: ' . $qry;
           die($message);
      }
  
      $return_arr = array();
      $row_array = array();
  
      $num_rows = mysqli_num_rows($query);
      if ($num_rows &gt; 0) {
          while ($r = mysqli_fetch_array($query)) {
  
              $row_array['place_id'] = $r['place_id'];
              $row_array['place_name'] = $r['place_name'];
              //echo "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; 
              //$row_array['image'] =  "http://localhost/tourist/". $r['db_image'];  //.'" alt=\"\" /"';
  
              $row_array['image'] = "tourist/".$r['db_image'];
              $row_array['des'] = $r['description'];
  
              header('Content-Type: application/json');
  
              array_push($return_arr,$row_array);
          }
          return json_encode($return_arr);
      } else { 
          $return_arr['place_name'] = 'ERRO - Place inexistente'; 
      }
      header('Content-Type: application/json');
      echo json_encode($return_arr);
      return json_encode($return_arr);
  
      mysqli_close($con);
  } else { 
      $return_arr['place_name'] = 'ERRO - failure';
      echo json_encode($return_arr);
      return json_encode($return_arr);
  }
  ?&gt;
  </code></pre>