How can I count the rows to see how many entries there are in the database?

You can use a SELECT COUNT(*) statement to count the number of rows in the e7u3qf_ip_data table, and then retrieve the count using the fetchColumn() method. Here's an example:

<?php
// Establish a database connection
$pdo = new PDO('mysql:host=localhost;dbname=my_database', 'my_username', 'my_password');

// Count the number of rows in the e7u3qf_ip_data table
$stmt = $pdo->prepare('SELECT COUNT(*) FROM e7u3qf_ip_data');
$stmt->execute();
$count = $stmt->fetchColumn();

echo "There are $count entries in the database";
?>

This code uses a SELECT COUNT(*) statement to count the number of rows in the e7u3qf_ip_data table, and then retrieves the count using the fetchColumn() method. The count is then printed to the screen using the echo statement.