如果from_date大于to_date，则交换日期

Question

I've two dates from_date and to_date. How to swap the two dates if the from_date is greater than the to_date. Here is the code I've tried. Thank You!

$from_date = $con->real_escape_string($_POST['from']);
$to_date = $con->real_escape_string($_POST['to']);

if(strtotime($from_date) > strtotime($to_date)) {
    $temp_date = $to_date;
    $from_date = $to_date;
    $to_date = $temp_date;
}

Answer 1

Wrong logic for swapping. You are not saving value of from_date before changing its value to to_date.

if(strtotime($from_date) > strtotime($to_date)) {
    $temp_date = $from_date;
    $from_date = $to_date;
    $to_date = $temp_date;
}