What are the potential pitfalls when storing decimal numbers with commas in a database that expects English notation?

When storing decimal numbers with commas in a database that expects English notation, the potential pitfalls include incorrect data formatting, errors in calculations, and difficulties in querying and manipulating the data. To solve this issue, you can remove the commas from the decimal numbers before storing them in the database and add them back when displaying the data.

// Remove commas from the decimal number before storing in the database
$decimalNumber = "1,234.56";
$decimalNumber = str_replace(',', '', $decimalNumber);

// Store the decimal number in the database

// Retrieve the decimal number from the database
$decimalNumberFromDb = "1234.56";

// Add commas back to the decimal number when displaying
$formattedDecimalNumber = number_format($decimalNumberFromDb, 2);
echo $formattedDecimalNumber; // Output: 1,234.56