How can the PHP date function be utilized to achieve specific date formats?

To achieve specific date formats using the PHP date function, you can use format characters to customize the output. For example, 'Y' represents the year in four digits, 'm' represents the month in two digits, 'd' represents the day in two digits, and so on. By combining these format characters in a specific order, you can generate the desired date format.

$date = date('Y-m-d'); // Outputs the date in the format YYYY-MM-DD
echo $date;