Untitled

<html>
<head>
   <title>Connect to MariaDB Server</title>
</head>

<body>
  <?php
     $dbhost = 'localhost';
     $dbuser = 'test';
     $dbpass = 'pass';
     $dbname = 'databseName';
     $conn = mysqli_connect($dbhost, $dbuser, $dbpass, $dbname);

     if(! $conn ) {
        die("Connection failed: " . mysqli_connect_error());
     }

     echo "Connected successfully<br><br>";

     function add($url, $category){
         $sql = "INSERT INTO tt (url, category) VALUES ('$url', '$category');";
         if(mysqli_query($conn, $sql)){
             echo "Recorded.";
         } else {
             echo "Error: " . $sql . "<br>" . mysqli_error($conn);
             }
      }

      if(function_exists($_GET['f'])){
         $_GET['f']($_GET['url'], $_GET['cat']);
      }

      mysqli_close($conn);
   ?>
</body>
</html>

Connected successfully

Error: INSERT INTO tt (url, category) VALUES ('google', 'google');