An error while using num_rows method in php - php

Question

I designed a login form, but while processing it has a fatal error which I have no idea how to fix that.
here are my codes:
dbConnection.php:
<?php
$host = 'localhost';
$user = 'root';
$pass = '';
$dbname = 'fashionshop';
$conn = new mysqli($host,$user,$pass,$dbname);
if($conn->connect_error){
die('Connection Failed:' .$conn->connect_error);
}
//echo "Connected Successfully";
?>
userloginprocess.php:
<?php require_once 'dbConnection.php'; ?>
<?php
if(isset($_POST['client-login-submit'])){
$username = $_POST['username'];
$password = $_POST['password'];
$sql = "SELECT * FROM users
WHERE username = '".$username."' AND password1 = '".$password."' LIMIT 1";
$result = $conn->query($sql);
if($conn->num_rows($result) == 1){ // this is line 14
header('location:welcome.php');
}else{
header('location:error.php');
}
}else{
header('location:notworking.php');
}
?>
html form:
<form action="inc/userloginprocess.php" method="post">
<h1>LOG IN</h1>
<input placeholder="Username" type="text" name="username" id="username">
<input placeholder="Password" type="password" name="password" id="password">
<input type="submit" name="client-login-submit" value="LOG IN">
<p>Forget Your Password? RESET</p>
<p>SIGN UP</p>
</form>
and finally the error when I submit the form:
Fatal error: Uncaught Error: Call to undefined method mysqli::num_rows() in C:\xampp\htdocs\fashionshop\inc\userloginprocess.php:14 Stack trace: #0 {main} thrown in C:\xampp\htdocs\fashionshop\inc\userloginprocess.php on line 14
I would be grateful if you help me.

Answer 1

You are using the wrong object in getting the number of rows. Use $result instead of $conn.
Make
$conn->num_rows($result)
To:
$result->num_rows