What functions can be used in PHP to convert a date to a timestamp and then format it as needed?

To convert a date to a timestamp in PHP, you can use the strtotime() function. Once you have the timestamp, you can format it as needed using the date() function. This allows you to easily manipulate date and time values in PHP to display them in various formats.

$date = "2022-01-01";
$timestamp = strtotime($date);
$formatted_date = date("Y-m-d H:i:s", $timestamp);
echo $formatted_date;