Problem with update form and date (show 1970-01-01)

Question

Hi, I've a update form (php/mysql) with many date input field. When my date is 000-00-00 I show 1970-01-01. Why??
This is the code:
label for="data_chiusura"><strong>Data chiusura</strong></label>
      <input type="text" name="Data_chiusura" value="<?php echo $string=$row_Recordset1['data_chiusura'];
    if($string == '0000-00-00'){
    $string = '';
    } else {
    $string = date("d-m-Y", strtotime($string));
    }; ?>" id="Data_chiusura">
Thanks
k

Answer 1

Why would the date ever be null? As long as the date has a non-zero, non-null value this function will work correctly.
I'm a little confused by what you are doing here. So, you are pulling data from a table, and populating forms with it. This particular field is a date field, and the problem is that when the data for that field is a null, you are getting instead a date of 1970-01-01 displayed in that field - is that correct? What do you want to appear there when the data is null? Nothing?