Jquery autocomplete + php + db + ajax - php

Question

in my project I have a problem with recive a data from database and send it to script.
main script file
<link rel="stylesheet" href="css/jquery-ui.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<script src="js/jquery-ui.min.js"></script>
...
<input type="text" class="form-control" name="startstation" placeholder="Stacja początkowa">
...
$( "input[name=startstation]" ).autocomplete({
source: function( request, response ) {
$.ajax({
url : 'station.php',
dataType: "json",
data: {
q: request.term
},
success: function( data ) {
response( $.map( data, function( item ) {
return {
label: item.name,
value: item.id
}
}));
}
});
},
minLength: 2
});
station.php
<?php
$connection = mysql_connect("localhost", "kilometry", "kilometry"); // Establishing Connection with Server..
$db = mysql_select_db("kilometry", $connection); // Selecting Database
//Fetching Values from URL
$q=$_GET["q"];
$sql="SELECT id, name FROM stations WHERE name LIKE '".$q."%' ORDER BY priority DESC";
$result = mysql_query($sql);
$options = array();
while ($row_id = mysql_fetch_array($result)) {
// more structure in data allows an easier processing
$options['myData'][] = array(
'name' => $row_id['name'],
'id' => $row_id['id']
);
}
mysql_close($connection);
echo json_encode($options);
?>
In dev tool script sends a Q value as parameter but in answer field I don't recive a answer: http://prntscr.com/fjo1gf
What is wrong? I think that is fail in while condition.