How can PHP developers effectively convert user-input dates into timestamps for easier manipulation and comparison in SQLite queries?

When dealing with user-input dates in PHP, it's important to convert them into timestamps for easier manipulation and comparison in SQLite queries. One way to do this is by using the strtotime() function in PHP, which converts a date string into a Unix timestamp. Once the date is converted into a timestamp, it can be easily used in SQLite queries for sorting, filtering, and comparison.

// Assuming $userInputDate is the user-input date in the format 'YYYY-MM-DD'
$userInputDate = '2022-01-15';

// Convert user-input date into a timestamp
$timestamp = strtotime($userInputDate);

// Now $timestamp can be used in SQLite queries for manipulation and comparison
// For example, you can use it in a query like:
// $query = "SELECT * FROM table WHERE date_column >= $timestamp";