From 8ab7bbe3857ceb5206f9caffcbf73580adf011c3 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov.ru@gmail.com>
Date: Thu, 25 Jul 2019 01:36:54 +0000
Subject: [PATCH] Posts, Post Types: Introduce `is_sticky` filter in
 `is_sticky()` to provide more flexibility for custom sticky post
 implementations.

Props dehisok, greenshady.
Fixes #37629.
Built from https://develop.svn.wordpress.org/trunk@45671


git-svn-id: http://core.svn.wordpress.org/trunk@45482 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/post.php    | 18 ++++++++++--------
 wp-includes/version.php |  2 +-
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/wp-includes/post.php b/wp-includes/post.php
index 44411baa0d..499f800d67 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -2213,15 +2213,17 @@ function is_sticky( $post_id = 0 ) {
 
 	$stickies = get_option( 'sticky_posts' );
 
-	if ( ! is_array( $stickies ) ) {
-		return false;
-	}
+	$is_sticky = is_array( $stickies ) && in_array( $post_id, $stickies );
 
-	if ( in_array( $post_id, $stickies ) ) {
-		return true;
-	}
-
-	return false;
+	/**
+	 * Filters whether a post is sticky.
+	 *
+	 * @since 5.3.0
+	 *
+	 * @param bool $is_sticky Whether a post is sticky.
+	 * @param int  $post_id   Post ID.
+	 */
+	return apply_filters( 'is_sticky', $is_sticky, $post_id );
 }
 
 /**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 5d5dda23c2..b21930f971 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-45670';
+$wp_version = '5.3-alpha-45671';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.