I created a header area thats basically 6 widgets, 3 on 2 rows. However, I would like to place into one of the widgets some PHP or a shortcode. The widget will only read HTML as far as I know. Is there a way perhaps in the functions.php to allow shortcodes or PHP to be read and executed as well?
To enable shortcode on text widget, just add filter in your theme functions.php
add_filter( 'widget_text', 'do_shortcode' );