What is the best way to convert a date in the format "$day $month $year" to a timestamp in PHP?

To convert a date in the format "$day $month $year" to a timestamp in PHP, you can use the strtotime() function which parses an English textual datetime description into a Unix timestamp. Simply concatenate the day, month, and year strings into a single string in the format that strtotime() expects, and then pass it to the function.

$date = "10 January 2022";
$timestamp = strtotime($date);
echo $timestamp;