Using a prepared statement in php & mysqli - php

Question

I am using prepared statements for the first time. And i cannot get the select to work.
For some reason, it returns all the records but i cannot get them into variables. I know it returns all the records because if i add echo '1'; to the loop it echo's 1 for each record.
Any assistance would be great. The code is below:
function builditems($quote_id){
if ($stmt = $this->link->prepare("SELECT * FROM `0_quotes_items` WHERE `quote_id` = ?")) {
// Bind a variable to the parameter as a string.
$stmt->bind_param("i", $quote_id);
// Execute the statement.
$stmt->execute();
while ($row = $stmt->fetch()) {
echo $row['id'];
}
// Close the prepared statement.
$stmt->close();
}
}
UPDATE:
in the error log, i see the following error after adding the while ($row = $stmt->fetch_assoc()) { like suggested:
PHP Fatal error: Call to undefined method mysqli_stmt::fetch_assoc()
I found a link that the same issue was had, but i do not understand how to implement the fix.
Any assistance would be great, with regards to a example.
How to remove the fatal error when fetching an assoc array

Answer 1

The PHP MySQLi fetch method does not access query data using brackets notation: $row['id'].
So I see two options to remedy: first find this line:
while ($row = $stmt->fetch()) {
...and modify it to, either, first add the bind_result method, and then access the data a bit differently:
$stmt->bind_result($id, $other, $whatnot); // assuming 3 columns retrieved in the query
while ($row = $stmt->fetch()) {
echo "$id $other $whatnot<br>";
}
...or, first access the result object's fetch_assoc method and use fetch_assoc instead of fetch:
$result = $stmt->get_result();
while ($row = $result->fetch_assoc()) {
Now you can use table column names as keys to access query data in your loop: $row['id'].
PHP MySQLi method fetch requires you to use bind_result. Doing this allows you to call your data by the variable names you've bound it to.
To use the field name as the result array index, such as: $row['id'], you need to use the PHP MySQLi fetch_assoc method. And to use fetch_assoc you need to first get the result object in order to access the fetch_assoc method.