Transactional statements with mysqli - php

Question

What is the proper syntax for preparing a transactional statement in mysqli? I've tried a number closest I've come is:
$conn->begin_transaction();
$stmt = $conn->prepare("INSERT INTO ARCHIVE_CLICKS_PATH SELECT * FROM CLICKS_PATH WHERE REFERER = ?");
$stmt->bind_param('i', $referer);
$stmt = $conn->prepare("DELETE FROM CLICKS_PATH WHERE REFERER = ?;");
$stmt->bind_param('i', $referer);
$stmt->close();
$conn->commit();
Doesn't throw errors, also doesn't seem to do anything.
Edit: I searched \ read the answer posted above before posting, it doesn't help me at all with prepared mysqli statement syntax specifically (which seems to be the issue). There is no errors being thrown, and the statement works fine when I directly input it to the database. I can get it to work fine unprepared, but I can't find the proper syntax of where to bind_params \ execute \ commit for a mysqli prepared statement example anywhere.
To add the following works fine:
BEGIN;
INSERT INTO ARCHIVE_CLICKS_PATH SELECT * FROM CLICKS_PATH WHERE REFERER = 15;
DELETE FROM CLICKS_PATH WHERE REFERER = 15;
COMMIT;
When I directly input it into the database.

Answer 1

You are supposed to use try catch block to throw the exception. see the example below:
$sql1 = "INSERT INTO ARCHIVE_CLICKS_PATH SELECT * FROM CLICKS_PATH WHERE REFERER = ?;";
$sql2 = "DELETE FROM CLICKS_PATH WHERE REFERER = ?;";
$stmt1 = $conn->prepare($sql1);
$stmt2 = $conn->prepare($sql2);
try{
$conn->query('BEGIN;');
if($stmt1 == false || $stmt2 == false || $stmt1->bind_param("i", $b) == false || $stmt2->bind_param("i", $a) == false || $stmt1->execute() == false || $stmt2->execute() == false){
throw new Exception($conn->error);
}
else{
echo "successful";
}
$conn->query('COMMIT;');
}
catch(Exception $e){
$conn->query("ROLLBACK;");
echo $e->getMessage();
}

Answer 2

This is what I figured out to solve it based on the answer above in case it ever helps anyone:
try
{
$conn->autocommit(FALSE);
$conn->begin_transaction();
$stmt1=$conn->prepare("INSERT INTO ARCHIVE_CLICKS_PATH SELECT * FROM CLICKS_PATH WHERE REFERER = ?;");
$stmt1->bind_param('i',$referer);
if ($stmt1->execute() == false) {
throw new Exception('Statement 1 Failed');
}
$stmt2=$conn->prepare("DELETE FROM CLICKS_PATH WHERE REFERER = ?;");
$stmt2->bind_param('i', $referer);
if ($stmt2->execute() == false) {
throw new Exception('Statement 2 Failed');
}
$stmt1->close();
$stmt2->close();
$conn->commit();
}
catch(Exception $e)
{
$conn->rollback();
throw $e;
}