Update current date in mysql using Update form DW CS4 PHP

Question

I have a field called datePosted that is set to curdate in the database.  What I want to do is when the checkbox on this form called approved is checked, and the form is submitted, I want that dateApproved field to update to the current date in the database.  When I have tried it, it says zero.  I have tried setting a variable and using now() but cant get it to change on update.
Here is the form
<form action="<?php echo $editFormAction; ?>" method="post" name="form1" id="form1">
    <table align="center">
      <tr valign="baseline">
        <td nowrap="nowrap" align="right">JobName:</td>
        <td><input type="text" name="jobName" value="<?php echo htmlentities($row_rs_crave['jobName'], ENT_COMPAT, 'UTF-8'); ?>" size="32" /></td>
      </tr>
      <tr valign="baseline">
        <td nowrap="nowrap" align="right" valign="top">Description:</td>
        <td><textarea name="description" cols="50" rows="5"><?php echo htmlentities($row_rs_crave['description'], ENT_COMPAT, 'UTF-8'); ?></textarea></td>
      </tr>
      <tr valign="baseline">
        <td nowrap="nowrap" align="right">State:</td>
        <td><select name="state">
          <option value="h" <?php if (!(strcmp("h", htmlentities($row_rs_crave['state'], ENT_COMPAT, 'UTF-8')))) {echo "SELECTED";} ?>>hh</option>
        </select></td>
      </tr>
      <tr valign="baseline">
        <td nowrap="nowrap" align="right">FleetID:</td>
        <td><input type="text" name="fleetID" value="<?php echo htmlentities($row_rs_crave['fleetID'], ENT_COMPAT, 'UTF-8'); ?>" size="32" /></td>
      </tr>
      <tr valign="baseline">
        <td nowrap="nowrap" align="right">Approved:</td>
        <td><input type="checkbox" name="approved" value=""  <?php if (!(strcmp(htmlentities($row_rs_crave['approved'], ENT_COMPAT, 'UTF-8'),""))) {echo "checked=\"checked\"";} ?> /></td>
      </tr>
      <tr valign="baseline">
        <td nowrap="nowrap" align="right">DatePosted:</td>
        <td><input type="text" name="datePosted" value="<?php echo htmlentities($row_rs_crave['datePosted'], ENT_COMPAT, 'UTF-8'); ?>" size="32" /></td>
      </tr>
      <tr valign="baseline">
        <td nowrap="nowrap" align="right"> </td>
        <td><input type="submit" value="Update record" /></td>
      </tr>
    </table>
    <input type="hidden" name="jobid" value="<?php echo $row_rs_crave['jobid']; ?>" />
    <input type="hidden" name="MM_update" value="form1" />
  </form>
And they sql
if ((isset($_POST["MM_update"])) && ($_POST["MM_update"] == "form1")) {
  $updateSQL = sprintf("UPDATE crave SET jobName=%s, `description`=%s, `state`=%s, fleetID=%s, approved=%s, datePosted=%s WHERE jobid=%s",
                       GetSQLValueString($_POST['jobName'], "text"),
                       GetSQLValueString($_POST['description'], "text"),
                       GetSQLValueString($_POST['state'], "text"),
                       GetSQLValueString($_POST['fleetID'], "int"),
                       GetSQLValueString(isset($_POST['approved']) ? "true" : "", "defined","1","0"),
                       GetSQLValueString($_POST['datePosted'], "date"),
                       GetSQLValueString($_POST['jobid'], "int"));

Answer 1

Change the SQL like this:
// Check whether the approved checkbox has been selected
$_POST['approved'] = isset($_POST['approved']) ? 1 : 0;
if ((isset($_POST["MM_update"])) && ($_POST["MM_update"] == "form1")) {
$updateSQL = sprintf("UPDATE crave SET jobName=%s, `description`=%s,
`state`=%s, fleetID=%s, approved=%s, datePosted=%s WHERE jobid=%s",
                       GetSQLValueString($_POST['jobName'], "text"),
                       GetSQLValueString($_POST['description'], "text"),
                       GetSQLValueString($_POST['state'], "text"),
                       GetSQLValueString($_POST['fleetID'], "int"),
                       GetSQLValueString(isset($_POST['approved']), "defined","NOW()","approved"),
                       GetSQLValueString($_POST['datePosted'], "date"),
                       GetSQLValueString($_POST['jobid'], "int"));
What that does is check whether the approved checkbox has been selected. If it has, $_POST['approved'] is set to 1 (true); if not, it's set to 0 (false).
In the GetSQLValueString() function, the value is set to NOW() if the checkbox has been selected. Otherwise, the existing value in the approved column is reassigned.