What potential issues can arise when trying to display decimal numbers in PHP?

When displaying decimal numbers in PHP, potential issues can arise due to the way floating-point numbers are represented internally. This can lead to unexpected results when performing calculations or comparisons with decimal numbers. To solve this issue, it is recommended to use the `number_format()` function to format decimal numbers with a specified number of decimal places.

$number = 10.555;
$formatted_number = number_format($number, 2);
echo $formatted_number;