Update from URL - php

Question

I have been working towards updating a password after a request has been sent and collected from email, the request part seems to work but when I try to update the password nothing seems to happen, my password length is set at 255, initially I checked if it was the correct id I was getting and it seems to be, when I manually run the query in easyphp adding what I want updated it seems to work, I have looked at my network response no errors are showing and checked my error logs nothing there either. Any advice would be great.
<?php
require_once'connection.php';
$userInput = new UserInput();
$userInput->trimInput();
$id = '';
if( isset( $_GET['reset'])) {
$id = $_GET['reset'];
}
header('Content-Type: application/json');
$errors = [];
if (empty($_SESSION['resetPassword'])) {
$_SESSION['resetPassword'] = 1;
}
else {
$_SESSION['resetPassword']++;
}
if($_SESSION['resetPassword'] > 3){
$errors[]= ["name"=>"username","error"=>"Too many attempts try again in 15 minutes"];
if(!isset($_SESSION["timeoutPassword"])){
$_SESSION['timeoutPassword'] = time();
};
$st = $_SESSION['timeoutPassword'] + 900;
if(time() > $st){
unset($_SESSION['resetPassword']);
unset($_SESSION['timeoutPassword']);
}
}
else {
if(filter_var($_GET['password'], FILTER_VALIDATE_REGEXP,["options"=> [ "regexp" => "/.{6,25}/"]]) === FALSE){
$errors[]= ["name"=>"password","error"=>"invalid password (6 to 25 characters)"];
}
if(!preg_match("/(?=[a-z]*[0-9])(?=[0-9]*[a-z])([a-z0-9-]+)/i",$_GET['password'])) {
$errors[]= ["name"=>"password","error"=>"Password must contain numbers and letters"];
}
if($_GET['password'] !== $_GET['repeatPassword']){
$errors[]= ["name"=>"repeatPassword","error"=>"passwords don't match"];
}
if (count($errors) === 0) {
try{
$sql = "UPDATE username SET activecode = 'Active', password = :password WHERE activecode = :reset";
$stmt = $db->prepare($sql);
$stmt->bindValue(':password', password_hash($_GET['password'], PASSWORD_DEFAULT));
$stmt->bindValue(':reset', $id);
$stmt->execute();
$stmt->rowCount();
if ( $stmt->rowCount() === 1){
echo json_encode(["success"=>"Your password has been reset"]);
exit(0);
}
}
catch(Exception $e ) {
$errors[]= ["name"=>"username","error"=>"Unable to update password"];
}
}
}
echo json_encode(["errors"=>$errors]);