PHP / MySQL / JSON encoding help

I am trying to implement the auto-complete script from http://www.devbridge.com/projects/autocomplete/jquery/. It's asking for JSON output like:

{
 query:'Li',
 suggestions:['Liberia','Libyan Arab Jamahiriya','Liechtenstein','Lithuania']
}

I am using PHP/MySQL. My query to get the suggestions would b开发者_JS百科e something like...

<?
$drug = $_GET['drug'];
$query = mysql_query("SELECT * FROM tags_drugs WHERE drug_name LIKE '$drug%'");
    while ($query_row = mysql_fetch_array($query))
        {
            $drug_name = $query_row['drug_name'];
        }

?>

This is where I'm stuck. How do I put the array $drug_name in the suggestions and encode it for json? Thanks in advance!

---

Use

$drug_name[] = $query_row['drug_name'];

instead of $drug_name = $query_row['drug_name'];

Then use

?>
<script type="text/javascript">    
    var drugName = <?php echo json_encode($drug_name);?>
</script>

Use this grugName variable in your JavaScript.

---

json_encode($drug_name)

From PHP.net - json_encode