How would I read the latitude and longitude for the google map?

The latitude and longitude data for the Google Map are being retrieved from the PHP $data variable, which presumably contains the data from the e7u3qf_ip_data table.

So, to read the latitude and longitude data for the Google Map, you would need to first retrieve the data from the e7u3qf_ip_data table using a SELECT statement in PHP (assuming you are using PHP as your server-side language). Here's an example:

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

// Select the latitude and longitude data from the table
$stmt = $pdo->prepare('SELECT latitude, longitude FROM e7u3qf_ip_data');
$stmt->execute();
$results = $stmt->fetchAll(PDO::FETCH_ASSOC);
?>

This code establishes a database connection using PDO, prepares a SELECT statement to retrieve the latitude and longitude data from the e7u3qf_ip_data table, executes the statement, and fetches the results as an associative array.

You can then use this data in the Google Maps JavaScript code to create markers on the map. Here's an example of how you could modify the code to use the retrieved data:

<script>
  function initMap() {
    var map = new google.maps.Map(document.getElementById('map'), {
      zoom: 4,
      center: {lat: 37.0902, lng: -95.7129}
    });

    // Step 4: Create markers on the map
    <?php foreach ($results as $row): ?>
      var marker = new google.maps.Marker({
        position: {lat: <?= $row['latitude'] ?>, lng: <?= $row['longitude'] ?>},
        map: map
      });
    <?php endforeach; ?>
  }
</script>

This code replaces the $data variable with the $results variable, which contains the latitude and longitude data retrieved from the e7u3qf_ip_data table. The foreach loop iterates over each row in the results array and creates a marker on the map using the lat and lng properties of each row.