Ticket #24674: 24674.ray.patch

src/wp-includes/query.php

@@ -4370 +4370 @@
 
                 $page = (array) $page;
 
-                if ( in_array( $page_obj->ID, $page ) ) {
+                if ( 0 !== $page_obj->ID && in_array( $page_obj->ID, $page ) ) {
                         return true;
                 } elseif ( in_array( $page_obj->post_title, $page ) ) {
                         return true;

tests/phpunit/tests/query/conditionals.php

@@ -809 +809 @@
                 $this->assertTrue( is_attachment( $post->post_title ) );
                 $this->assertTrue( is_attachment( $post->post_name ) );
         }
+
+        function test_is_page_with_page_id_zero_and_random_page_slug() {
+                $post_id = $this->factory->post->create( array( 'post_type' => 'page' ) );
+                $this->go_to( "/?page_id=$post_id" );
+
+                // override post ID to 0 temporarily for testing
+                $_id = $GLOBALS['wp_query']->post->ID;
+                $GLOBALS['wp_query']->post->ID = 0;
+
+                $post = get_queried_object();
+                $q = $GLOBALS['wp_query'];
+
+                $this->assertTrue( $q->is_page() );
+                $this->assertFalse( $q->is_page( 'sample-page' ) );
+                $this->assertFalse( $q->is_page( 'random-page-slug' ) );
+
+                // revert $wp_query global change
+                $GLOBALS['wp_query']->post->ID = $_id;
+        }
 }