脚本不起作用

In my PHP generated webpage there are 3 linked listboxes. When the user changes the selection in list_1, the contents of list_2 and list_3 changes accordingly (e.g. as it would change in 3 lists containing continent -> country -> city).

The code is:

PHP (032A_GetProvincie.php) [EDITED]

$provincie = array();

$query = 'SELECT nume_prov FROM sa_Provincie ';
$query .= 'WHERE provincie_id > 777 ';
$query .= 'ORDER BY nume_prov';

// Get query ---------------------------------------------------

$query_data = mysqli_query($db_conn, $query);

if ($query_data == FALSE)
   {
   array_push($provincie, 'None found');
   goto _adr1;
   }

$rows = mysqli_num_rows($query_data);
if ($rows == 0)
   {
   array_push($provincie, 'None found');
   goto _adr1;
   }

// Build array -------------------------------------------------

array_push($provincie, 'All_';

while ($row = mysqli_fetch_array($query_data))
      array_push($provincie, $row['nume_prov']);

// End 

_adr1:
print json_encode($provincie);

mysqli_free_result($query_data);
mysqli_close($db_conn); 

Javascript

$(document).ready(function()
{
$.getJSON("/scripts/032A_GetProvincie.php", function(data)
   {
   var str_options = "";
   for (var i = 0; i < data.length; i++)
       {
       str_options += "<option value='" + data[i] + "'>" + data[i] + "</option> 
";
       }

   $("#listaProvincie").append(str_options);

   $("#listaProvincie").change();
   });


$("#listaProvincie").change(function()
{
$.getJSON("/scripts/032B_GetRegiune.php?provincie=" + $(this).val(), function(data)
   {
   var str_options = "";
   for (var i = 0; i < data.length; i++)
       {
       str_options += "<option value='" + data[i] + "'>" + data[i] + "</option> 
";
       }

   $("#listaRegiune").html("");
   $("#listaRegiune").append(str_options);

   $("#listaRegiune").change();

   });
});
...

listaProvincie is list_1, listaRegiune is list_2, etc. When data is returned by the PHP queries, the lists are populated accordingly;

however, if the query there returns no data, the line 'None found' does not appear as an option in list_1, the list remains BLANK.

I am a Javascript rookie, so maybe I do not understand something elementary, but what is wrong with my code ? And please don't try to give me a solution that uses Ajax, I know almost nothing about it.

Note: In the code I show here, the WHERE clause of my PHP query deliberately contains a condition provincie_id > 777 that I know returns no rows, yet list_1 remains blank. I am thinking, any value I push in the array should appear in the list, shouldn't it ?

[EDIT 1] No, it's not right. When I push values directly into $provincie (PHP array), the script doesn't work anymore. Why ??? How can I give some feedback to the primary PHP page, which calls the JavaScript script, which calls 032A_GetProvincie.php, if something goes wrong in 032A_.. ?

[EDIT 2] I don't know exactly why, but after some more fidgeting, array_push() "started" working the way it should work, and my problems were solved. I'm a PHP ROOKIE as well. Well, I started programming in PHP 9 months ago, coming from VisualStudio. There, things are much more simple and clear.