What potential issues can arise when manipulating date formats in PHP, as seen in the provided code snippet?

When manipulating date formats in PHP, potential issues can arise due to differences in date formats between input and output. To avoid errors, it is essential to ensure that the date format is consistent throughout the manipulation process. One way to solve this issue is by using the DateTime class in PHP, which allows for easy conversion between different date formats.

// Original code snippet
$date = '2022-01-15';
$new_date = date('m/d/Y', strtotime($date));

// Fix using DateTime class
$date = '2022-01-15';
$datetime = new DateTime($date);
$new_date = $datetime->format('m/d/Y');

echo $new_date;