Ticket #37906: pre_do_shortcode_tag.diff

shortcodes.php

@@ -321 +321 @@
                 return $m[0];
         }
 
+        /**
+         * Filters whether to call a shortcode callback.
+         *
+         * Passing a truthy value to the filter will effectively short-circuit the
+         * shortcode generation process, returning that value instead.
+         *
+         * @since 4.7.0
+         *
+         * @param bool|string $return      Short-circuit return value. Either false or a URL string.
+         * @param string      $tag         Shortcode name.
+         * @param array       $attr        Shortcode attributes array,
+         * @param array       $m           Regular expression match array.
+         */
+        $return = apply_filters( 'pre_do_shortcode_tag', false, $tag, $attr, $m );
+        if ( false !== $return ) {
+                return $return;
+        }
+
         if ( isset( $m[5] ) ) {
                 // enclosing tag - extra parameter
                 return $m[1] . call_user_func( $shortcode_tags[$tag], $attr, $m[5], $tag ) . $m[6];