What is the recommended practice for formatting numbers with thousand separators in PHP?

When formatting numbers with thousand separators in PHP, the recommended practice is to use the number_format() function. This function takes the number as the first parameter and optional parameters for the number of decimal places, the decimal separator, and the thousand separator. By using number_format(), you can easily format numbers with thousand separators in PHP.

$number = 1234567.89;
$formatted_number = number_format($number);
echo $formatted_number; // Output: 1,234,567