Error with php function in "mysqli select" prepare statement - php

Question

I create a function to call some data from database with left-join and prepare statement.
Here is the sketch of the php function:
function getStock()
{
global $mysqli;
$stmt = $mysqli->prepare
("SELECT products.`product_name`, product_category.`price`
FROM products
LEFT JOIN product_category
ON products.product_category_id = product_category.id
WHERE products.id = ?");
$id=3;
$stmt->bind_param("s", $id);
$stmt->execute();
$stmt->fetch();
return $stmt;
In the view page I do this:
$resultsTicket = getStock();
$results = $resultsTicket->num_rows;
var_dump($results);
if ($resultsTicket->num_rows > 0) {
while($resultsTicket->fetch()){
However in the var_dump I only get int(0)
I don't know anymore how to find the error there beside the var_dump. Please help me in the above code. Thank you!
[UPDATE]
$query = "SELECT products.`product_name`, product_category.`price`
FROM products
LEFT JOIN product_category
ON products.product_category_id = product_category.id
WHERE products.id = 3;
if ($stmt = $mysqli->prepare($query)) {
$stmt->execute();
$stmt->bind_result($product_name, $price);
//$stmt->fetch();
while ($stmt->fetch()) {
printf ("%s (%s)\n", $product_name, $price);
}
$stmt->close();}
return $stmt;
}
In the code above I get one data/row from database.

Answer 1

The problem is that you are executing and fetching within the function but returning the statement. There are two possible changes you can make.
Execute and fetch within the function, then loop through the results and return an array representing the results.
Return the statement from the function and perform the execute and fetch where you are using the result of the function.

Answer 2

I think you got enough help with the guys, If you still not sure how to code it, here you go:
Single record
$query = "SELECT products.`product_name`, product_category.`price`
FROM products
LEFT JOIN product_category
ON products.product_category_id = product_category.id
WHERE products.id = 3";
if ($stmt = $mysqli->prepare($query)) {
$stmt->execute();
$stmt->bind_result($product_name, $price);
$row = array();
while ($stmt->fetch()) {
$row = array('product_name'=>$product_name, 'price'=>$price);
}
$stmt->close();
}
return $row;
Multiple Record:
$query = "SELECT products.`product_name`, product_category.`price`
FROM products
LEFT JOIN product_category
ON products.product_category_id = product_category.id
WHERE products.id = 3";
if ($stmt = $mysqli->prepare($query)) {
$stmt->execute();
$stmt->bind_result($product_name, $price);
$rows = array();
while ($stmt->fetch()) {
$rows[] = array('product_name'=>$product_name, 'price'=>$price);
}
$stmt->close();
}
return $rows;
Example in PDO:
$query = "SELECT products.`product_name`, product_category.`price`
FROM products
LEFT JOIN product_category
ON products.product_category_id = product_category.id
WHERE products.id = 3";
if ($stmt = $pdo->prepare($query)) {
$stmt->execute();
$rows = $stmt->fetchAll();
}
return $rows;