retaining values on form reload

[frankkfk4]

how to retain the input form values when the page is reloaded

[zmbd]

what have you tried so far?

[ayukawaa]

I use the fields like this

<input 
name="ejercicio" 
type="text" 
id="ejercicio" 
value="<?php echo array_key_exists('ejercicio', $_POST) ? htmlentities($_POST['ejercicio'], ENT_COMPAT, 'utf-8') : ''; ?>"
size="6"
maxlength="4" />

that works fine !!!!!!!!!!!!