mysql_fetch_array only running once, should be six - php

Question

I can see in my logcat that the $check query is only running once, when it should be running once for every result of the $result query, which is 6. I've been troubleshooting this for hours and I just can't figure out why it's not working properly.
Is there an obvious reason why $check is only running once?
$result = mysql_query("SELECT * FROM `posts` WHERE facebook_id = $fbid ORDER BY id DESC") or die(mysql_error());
while ($row1 = mysql_fetch_array($result))
{
$mytime = $row1['time'];
$mylat = $row1['latitude'];
$mylon = $row1['longitude'];
$mypostid = $row1['id'];
// get all products from products table
$check = mysql_query("SELECT facebook_id as fid, id as uid,
TIMESTAMPDIFF(SECOND, `time`, '$mytime') AS timediff
FROM `posts`
WHERE `facebook_id` != $fbid
HAVING `timediff` <= '180'
ORDER BY `time` DESC") or die(mysql_error());
if (mysql_num_rows($check) > 0)
{
$response["products"] = array();
while ($row = mysql_fetch_array($check))
{
// temp user array
$product = array();
$product["facebookid"] = $row["fid"];
$product["timediff"] = $row["timediff"];
$product["theirpostid"] = $row["uid"];
$product["mypostid"] = $mypostid;
// push single product into final response array
array_push($response["products"], $product);
}
}
}
$response["success"] = 1;
echo json_encode($response);

Answer 1

I guess this is because you set
$response["products"] = array();
inside every cycle. Move it out of this inner while.