How can PHP's strtotime function be utilized in converting a string to a timestamp?

PHP's strtotime function can be utilized to convert a date/time string into a Unix timestamp. This is useful when working with date/time data in PHP and needing to perform calculations or comparisons. To use strtotime, simply pass the date/time string as an argument to the function, and it will return the corresponding Unix timestamp.

$dateString = "2022-01-01 12:00:00";
$timestamp = strtotime($dateString);
echo $timestamp;