Hi Dan,
It sounds like you want to automatically calculate the sum of two fields and display that sum in a third field, but you also want to save that calculated value in your database. You can achieve this without triggers using PHP.
Here's a simple outline of how you can do this:
First, retrieve the values of the two fields you want to sum from your form or database.
Calculate the sum of these two fields and store it in the $val variable.
Display the calculated sum in your HTML form (non-editable).
When you save the form, you can insert or update the database record with the calculated sum value.
Here's some example code in PHP:
// Retrieve the values of the two fields
$field1 = $_POST['field1']; // Replace 'field1' with the actual name of the first field.
$field2 = $_POST['field2']; // Replace 'field2' with the actual name of the second field.
// Calculate the sum
$val = $field1 + $field2;
// Display the calculated sum (non-editable)
echo '<input type="text" name="sumField" value="' . $val . '" readonly>';
// When saving the form, you can insert or update the database record with $val
// You would use your database connection and SQL query here
// For example, using PDO:
// $sql = "INSERT INTO your_table (sum_field, field1, field2) VALUES (?, ?, ?)";
// $stmt = $pdo->prepare($sql);
// $stmt->execute([$val, $field1, $field2]);
// If updating an existing record, you would use an UPDATE statement instead.
This code snippet assumes that you're working with a simple HTML form and a PHP script to handle the form submission. You can adapt it to your specific use case and database structure.
Using triggers is an option if you prefer to handle this calculation at the database level, but it's not necessary for this particular task and can be achieved with PHP as described above.
I hope this helps! If you have any specific questions or encounter issues, feel free to ask as an
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