Count rows in while loop - php

Question

I am trying to while loop information into a SELECT statement, then COUNT the results. I have tried at least 10 different "solutions" and none works. I only get 0, 1, or nothing. Here's my most recent attempt:
$query35 = "SELECT * FROM movies WHERE userID = $memberID";
$result35 = $db->query($query35);
while ($row35 = $result35->fetchAll(PDO::FETCH_ASSOC)) {
$movie = $row35['movie'];
$query36 = "SELECT COUNT(*) AS similar FROM movies WHERE userID = '$profileID' && movie = '$movie'";
$result36 = $db->query($query36);
$row36->fetchObject;
$similar = $row36['similar'];
echo $similar;
}

Answer 1

$row36->fetchObject;
Seems null object, I think it should be
$row36 = $result36->fetchObject();

Answer 2

If all you are looking to do is count the number of times your loop is run per script execution, then it is fairly simple to do. See below:
$count = 0;
while($row35 = $result35->fetch(PDO::FETCH_ASSOC)){
//Do all your loop stuff.
$count++;
}
var_dump($count);
Important to note that your $count variable needs to be declared outside of your loop.
Also you either need to use fetchAll with a foreach loop, or use fetch with a while loop, but don't mix them.
Also a tip on good practice. Try to avoid as much as possible executing any kind of database querying with a loop, you can run into serious performance issues down the line as your loops get bigger.

Answer 3

Not sure what are you doing. But at least try:
$query35 = "SELECT * FROM movies WHERE userID = $memberID";
$result35 = $db->query($query35);
if ($row35 = $result35->fetchAll(PDO::FETCH_ASSOC))
foreach ($row35 as $row) {
print_r($row);
}
or maybe
$query35 = "SELECT * FROM movies WHERE userID = $memberID";
$result35 = $db->query($query35);
while ($row = $result35->fetch(PDO::FETCH_ASSOC)) {
print_r($row);
$movie = $row['movie'];
$query36 = "SELECT COUNT(*) AS similar FROM movies WHERE userID = '$profileID' && movie = '$movie'";
$result36 = $db->query($query36);
$obj = $result36->fetchObject();
$similar = $obj->similar;
echo $similar;
}