I'm writing a code to compare user input with the database. I want the code display "is phishing" when the user input a word that already exist on the database.

```
<?php
    include 'backend.php';
            $userinput = $_POST['userinput'];    
            if (mysqli_num_rows($result) > 0) {

              $row = mysqli_fetch_assoc($result);

                if($userinput==isset($row['keywords']))
                {
                    echo "is phishing";
                }else{
                    echo "is legitimate";
                }
            }
        ?>

```