Unsupported operand types eval()’d code:29)

Hello @pletershek

Thanks for reaching out and sorry your facing problems. It looks like the error is caused by a type mismatch—specifically, a float (decimal number) and a string being added together. This may have started happening after your PHP update because newer versions of PHP are stricter about type handling.

To fix this, you’ll want to ensure that both values being added are numbers. Try updating your snippet like this:

$variable1 = floatval($variable1); // Ensure it's a number
$variable2 = floatval($variable2); // Ensure it's a number

$result = $variable1 + $variable2; // Now both are floats, preventing the error

If you’re unsure which variables are causing the issue, you can try debugging using WordPress debugging or a plugin like variable inspector.

To use WordPress debugging this needs to be enabled, by setting (WP_DEBUG in wp-config.php) to true.

error_log( 'Variable 1: ' . gettype($variable1) . ' - ' . print_r($variable1, true) );
error_log( 'Variable 2: ' . gettype($variable2) . ' - ' . print_r($variable2, true) )

Then check your error log (wp-content/debug.log) to see their types and values.

Hope this helps