Create But2.php

But2.php

@@ -0,0 +1,22 @@
+<?php
+// Establish a database connection (Assuming you have already connected to your database)
+
+// Assuming the username is obtained from a form submission
+$username = $_POST['username']; // Replace this with your actual way of obtaining the username
+
+// Perform the query to check if the user with the given username has a non-null mean
+$query = "SELECT username, mean FROM users WHERE username = '$username' AND mean IS NOT NULL";
+$result = mysqli_query($connection, $query); // Assuming you are using mysqli
+
+// Check if the query returned any rows
+if (mysqli_num_rows($result) > 0) {
+    // User with non-null mean found
+    header('Location: a.html'); // Redirect to a.html if mean is not null
+} else {
+    // User not found or mean is null
+    header('Location: b.html'); // Redirect to b.html if mean is null or user not found
+}
+
+// Close the database connection
+mysqli_close($connection); // Assuming you are using mysqli
+?>