Ticket #10886: 10886.4.diff

src/wp-includes/functions.php

@@ -873 +873 @@
  */
 function wp( $query_vars = '' ) {
         global $wp, $wp_query, $wp_the_query;
-        $wp->main( $query_vars );
+        
+        /**
+         * Filter whether to setup the WordPress environment variables.
+         *
+         * @since 4.2
+         *
+         * @param bool True will setup the WordPress environment variables, false will not.
+         * @param string|array $query_vars Default WP_Query arguments.
+         */
+        if ( apply_filters( 'run_wp_main', true, $query_vars ) ) {
+                $wp->main( $query_vars ); 
+        }
 
-        if ( !isset($wp_the_query) )
+        if ( !isset($wp_the_query) ) {
                 $wp_the_query = $wp_query;
+        }
 }
 
 /**