How can I whitelist only specific shortcodes for processing in text widgets?

2 comments

1. add_filter( 'widget_text', 'wpse_137725_shortcode_whitelist' );
   
   /**
    * Apply only whitelisted shortcode to content.
    * 
    * @link http://wordpress.stackexchange.com/q/137725/1685
    * 
    * @param   string  $text
    * @return  string
    */ 
   function wpse_137725_shortcode_whitelist( $text ) {
       static $whitelist = array(
           'gallery',
           'form',
       );
   
       global $shortcode_tags;
   
       // Store original copy of registered tags.
       $_shortcode_tags = $shortcode_tags;
   
       // Remove any tags not in whitelist.
       foreach ( $shortcode_tags as $tag => $function ) {
           if ( ! in_array( $tag, $whitelist ) )
               unset( $shortcode_tags[ $tag ] );
       }
   
       // Apply shortcode.
       $text = shortcode_unautop( $text );
       $text = do_shortcode( $text );
   
       // Restore tags.
       $shortcode_tags = $_shortcode_tags;
   
       return $text;
   }
   

2. Or little bit simplier.

   function do_shortcode_only_for($content, $tagnames) {
     $pattern = get_shortcode_regex($tagnames);
     $content = preg_replace_callback("/$pattern/", 'do_shortcode_tag', $content);
     return $content;
   }
   

   Taken from original do_shortcode function.

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