Define date boundaries in PHP

Question

I used some date functions surrounding the French Republic of 1792-1806. But I want to know if the (PHP8) date functions can handle these dates.

function CheckFrDate($CheckDate){
  $BeginFrDate = date_create_from_format('d/m/Y', '22/09/1792');
  $EndFrDate = date_create_from_format('d/m/Y', '22/09/1806');
  if (
    $CheckDate->getTimestamp() > $BeginFrDate->getTimestamp() &&
    $CheckDate->getTimestamp() < $EndFrDate->getTimestamp()){
    return 1;
  }else{
    return -1;
  }
}

So a date like September 23, 1793 should be fine. But my function keeps returning false.

Answer 1

If the date function returns false, you can get detailed error information by calling var_dump(date_get_last_errors()).

More information: https://www.php.net/manual/en/function.date-get-last-errors.php