Is there a regular expression to check for correct PHP date format entry?
<p>I have an input box that lets users enter a date format in PHP date format, for example: 
M j, Y</p>

<p>I want to verify on submit that the user actually enters a date that's in PHP date format. I already have the validation script ready, I just need a regular expression or some sort of way to check that the user actually entered a valid PHP date notation. </p>

<p>Is this even possible? </p>

<p>Thanks for any insights!</p>
