php - how to insert an empty value in mysql date type field?

Question

How to insert a NULL or empty value in a mysql date type field (NULL = yes).

If I try to insert an empty value it inserts 0000-00-00 but I want to keep it empty or NULL.

Thanks for help.

UPDATE

Please see that I have set default value as NULL

  `payment_due_on` date DEFAULT NULL,

Ok OKies

I have got it working now

function get_mysqlDate($date, $delimiter='/') {
    if(check_empty($date)) {
        return 'NULL';
    }
    list($d, $m, $y) = explode($delimiter, $date);
    //$datetime = strtotime($date);
    return "'".date('Y-m-d', mktime(0,0,0,$m, $d, $y))."'";
}




"... SET mydate = ".get_mysqldate($_POST['mydate'])." ...."

Cheers

Answer 1

If that's happening, it's because the column has been defined with NOT NULL or with a default '0000-00-00'. You need to change the column definition to allow NULLs and have no default.

Your insert should be specifying NULL, as well, not '', if that's what you mean by "empty value".