[nik_neman]

В php файле сделал так

$arr[] = array(
    "totalCount" => '6679',
    "topics" =>
    array(
        array(
            "post_id" => "604220",
            "topic_title" => "Status bar error with IFrames",
            "topic_id" => "134120",
            "author" => "Daz",
            "post_time" => "1305857168",
            "post_text" => "Ext version tested:",
            "forum_title" => "EXT",
            "forumid" => "41",
            "reply_count" => "0"
            )
    )
);

$json = json_encode($arr);
echo $json;

Нечего не выводит.

Если объявить $arr, то в консоли ошибка - SyntaxError: missing ; before statement
{"totalCount":"6679","topics":[{"post_id":"604220","topic_title":"Status