<?php if(isset($_POST['FORM_INPUT_OR_TEXTAREA_NAME_GOES_HERE'])){ echo $_POST['FORM_INPUT_OR_TEXTAREA_NAME_GOES_HERE']; } ?>

SAMPLE OF A FORM INPUT:

<input name="name" size="20" value="<?php if(isset($_POST['name'])){ echo $_POST['name']; } ?>">

SAMPLE OF A FORM TEXTAREA:

<textarea name="comments" rows=5 cols=20><?php if(isset($_POST['comments'])){ echo $_POST['comments']; } ?></textarea>

http://www.complimedia.com/contact.php

This is a short and sweet snippet that will save the users form input after PHP runs validation and returns false.    Very good for User Experience!

Stop PHP form inputs returning empty after validation

form, validation

PHP