もちろん、請求書を追跡するためのPHPプログラムを書くお手伝いをします。以下は、請求書を追跡するために使用できる基本的なスクリプトの例です：

```
<?php
// Set up the database connection
$db = new mysqli(hostname, username, password, database_name);

// Query the database for all invoices
$result = $db->query("SELECT * FROM invoices");

// Loop through each invoice to get the details
while ($row = $result->fetch_assoc()) {
    // Get the invoice details
    $invoice_id = $row['id'];
    $invoice_status = $row['status'];
    $invoice_date = $row['date'];
    $invoice_total = $row['total'];
    
    // Now you can do something with the invoice details
    // For example, you could log them in a file or show them on a page
    echo "Invoice #$invoice_id is $invoice_status and was created on $invoice_date for a total of $invoice_total";
}

// Close the database connection
$db->close();
?>
```
Sure, I can help you write a PHP program to track invoices. Here is an example of a basic script that can be used to track invoices:

<?php
// Set up the database connection
$db = new mysqli(hostname, username, password, database_name);

// Query the database for all invoices
$result = $db->query("SELECT * FROM invoices");

// Loop through each invoice to get the details
while ($row = $result->fetch_assoc()) {
    // Get the invoice details
    $invoice_id = $row['id'];
    $invoice_status = $row['status'];
    $invoice_date = $row['date'];
    $invoice_total = $row['total'];
    
    // Now you can do something with the invoice details
    // For example, you could log them in a file or show them on a page
    echo "Invoice #$invoice_id is $invoice_status and was created on $invoice_date for a total of $invoice_total";
}

// Close the database connection
$db->close();
?>