Date Of Birth Validation Select Fields PHP
<p>I have a form with 3 select fields used for users dob(one for month, day, year). Once the form is submitted, I need to do a check to make sure that <em>if</em> those date fields have been filled, that the data is consistent.</p>

<p>The field is not required, so the data is <em>only</em> handled by the server if all of the fields are filled. But I'm concerned about how to handle the error of when the user submits some of the fields filled, and others not filled. So if the user submits the year, and month, but not the day, and so on and so forth.</p>

<p>Any suggestions, or help will be appreciated.</p>
