This could be one of the shortest tutorials ever, but still, some may find it useful – in order to activate the ability of regular text widgets to render shortcodes, all that needs to be done is the following:
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add_filter('widget_text', 'do_shortcode'); |
You would put this into functions.php or in custom functions plugin. And that’s all. No need for custom plugins that offer custom shortcode widgets, PHP widgets with do_shortcode(), etc.