What are some recommended methods or functions for determining the weekday of a specific date in PHP?

To determine the weekday of a specific date in PHP, you can use the `date()` function along with the `l` format character, which returns the full name of the weekday. You can also use the `w` format character to get the numeric representation of the weekday (0 for Sunday, 1 for Monday, etc.).

$date = "2022-12-25"; // specify the date in YYYY-MM-DD format
$weekday_name = date("l", strtotime($date)); // get the full name of the weekday
$weekday_number = date("w", strtotime($date)); // get the numeric representation of the weekday

echo "The weekday of $date is $weekday_name (day $weekday_number)";