What are the potential pitfalls of formatting numbers with punctuation in PHP, especially when interacting with databases?

When formatting numbers with punctuation in PHP, especially when interacting with databases, it's important to remember that the punctuation might interfere with database operations such as calculations or comparisons. To avoid potential pitfalls, it's recommended to store numbers in their raw form in the database and only format them with punctuation for display purposes. This way, you can ensure accurate processing of numerical data without any unexpected issues.

// Storing raw numbers in the database
$number = 1000000; // Raw number without punctuation

// Formatting the number with punctuation for display
$formattedNumber = number_format($number); // Adds commas for display

echo $formattedNumber; // Output: 1,000,000