How can the mktime() function in PHP be used to convert a date to a timestamp?

The mktime() function in PHP can be used to convert a date to a timestamp by specifying the individual components of the date (hour, minute, second, month, day, year) as parameters. This function returns a Unix timestamp representing the date and time specified. To use mktime(), simply provide the necessary date components and store the returned timestamp in a variable for further use.

$date_timestamp = mktime(0, 0, 0, 10, 1, 2022);
echo $date_timestamp;