I’m doing a date validation but it keeps giving me an error message Notice:

Question

0

Editorial Team

Asked: June 9, 20262026-06-09T23:50:23+00:00 2026-06-09T23:50:23+00:00

I’m doing a date validation but it keeps giving me an error message Notice:

0

I’m doing a date validation but it keeps giving me an error message

Notice: Undefined variable: parts in C:\xampp\htdocs\signup.php on line 15

if (empty($_POST['birthday']))
    // the user's date of birth cannot be a null string
    $errors[] = "You must supply a date of birth.";
else if (!strpos("^([0-9]{2})/([0-9]{2})/([0-9]{4})$", $_POST['birthday'], $parts))
    // Check the format
    $errors[] = "The date of birth is not a valid date in the " .
        "format DD/MM/YYYY";
elseif (!checkdate($parts[2],$parts[1],$parts[3]))
    $errors[] = "The date of birth is invalid. " .
        "Please check that the month is between 1 and 12, " .
        "and the day is valid for that month.";
elseif (intval($parts[3]) < 1890)
    // Make sure that the user has a reasonable birth year
    $errors[] = "You must be alive to use this service.";