How can I ensure that a decimal number in PHP always displays a certain number of digits after the comma?

When working with decimal numbers in PHP, you can ensure that a specific number of digits are always displayed after the comma by using the number_format() function. This function allows you to format a number with a specific number of decimal places. Simply pass the number you want to format and specify the number of decimal places you want to display.

$number = 123.456789;
$formatted_number = number_format($number, 2); // This will display 123.46
echo $formatted_number;