diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/class-wp-post.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/class-wp-post.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,374 @@
+<?php
+/**
+ * Post API: WP_Post class
+ *
+ * @package WordPress
+ * @subpackage Post
+ * @since 4.4.0
+ */
+
+/**
+ * Core class used to implement the WP_Post object.
+ *
+ * @since 3.5.0
+ *
+ * @property string $page_template
+ *
+ * @property-read array  $ancestors
+ * @property-read int    $post_category
+ * @property-read string $tag_input
+ *
+ */
+final class WP_Post {
+
+	/**
+	 * Post ID.
+	 *
+	 * @since 3.5.0
+	 * @var int
+	 */
+	public $ID;
+
+	/**
+	 * ID of post author.
+	 *
+	 * A numeric string, for compatibility reasons.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_author = 0;
+
+	/**
+	 * The post's local publication time.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_date = '0000-00-00 00:00:00';
+
+	/**
+	 * The post's GMT publication time.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_date_gmt = '0000-00-00 00:00:00';
+
+	/**
+	 * The post's content.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_content = '';
+
+	/**
+	 * The post's title.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_title = '';
+
+	/**
+	 * The post's excerpt.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_excerpt = '';
+
+	/**
+	 * The post's status.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_status = 'publish';
+
+	/**
+	 * Whether comments are allowed.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $comment_status = 'open';
+
+	/**
+	 * Whether pings are allowed.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $ping_status = 'open';
+
+	/**
+	 * The post's password in plain text.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_password = '';
+
+	/**
+	 * The post's slug.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_name = '';
+
+	/**
+	 * URLs queued to be pinged.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $to_ping = '';
+
+	/**
+	 * URLs that have been pinged.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $pinged = '';
+
+	/**
+	 * The post's local modified time.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_modified = '0000-00-00 00:00:00';
+
+	/**
+	 * The post's GMT modified time.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_modified_gmt = '0000-00-00 00:00:00';
+
+	/**
+	 * A utility DB field for post content.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_content_filtered = '';
+
+	/**
+	 * ID of a post's parent post.
+	 *
+	 * @since 3.5.0
+	 * @var int
+	 */
+	public $post_parent = 0;
+
+	/**
+	 * The unique identifier for a post, not necessarily a URL, used as the feed GUID.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $guid = '';
+
+	/**
+	 * A field used for ordering posts.
+	 *
+	 * @since 3.5.0
+	 * @var int
+	 */
+	public $menu_order = 0;
+
+	/**
+	 * The post's type, like post or page.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_type = 'post';
+
+	/**
+	 * An attachment's mime type.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $post_mime_type = '';
+
+	/**
+	 * Cached comment count.
+	 *
+	 * A numeric string, for compatibility reasons.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $comment_count = 0;
+
+	/**
+	 * Stores the post object's sanitization level.
+	 *
+	 * Does not correspond to a DB field.
+	 *
+	 * @since 3.5.0
+	 * @var string
+	 */
+	public $filter;
+
+	/**
+	 * Retrieve WP_Post instance.
+	 *
+	 * @since 3.5.0
+	 * @static
+	 *
+	 * @global wpdb $wpdb WordPress database abstraction object.
+	 *
+	 * @param int $post_id Post ID.
+	 * @return WP_Post|false Post object, false otherwise.
+	 */
+	public static function get_instance( $post_id ) {
+		global $wpdb;
+
+		$post_id = (int) $post_id;
+		if ( ! $post_id ) {
+			return false;
+		}
+
+		$_post = wp_cache_get( $post_id, 'posts' );
+
+		if ( ! $_post ) {
+			$_post = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = %d LIMIT 1", $post_id ) );
+
+			if ( ! $_post )
+				return false;
+
+			$_post = sanitize_post( $_post, 'raw' );
+			wp_cache_add( $_post->ID, $_post, 'posts' );
+		} elseif ( empty( $_post->filter ) ) {
+			$_post = sanitize_post( $_post, 'raw' );
+		}
+
+		return new WP_Post( $_post );
+	}
+
+	/**
+	 * Constructor.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param WP_Post|object $post Post object.
+	 */
+	public function __construct( $post ) {
+		foreach ( get_object_vars( $post ) as $key => $value )
+			$this->$key = $value;
+	}
+
+	/**
+	 * Isset-er.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param string $key Property to check if set.
+	 * @return bool
+	 */
+	public function __isset( $key ) {
+		if ( 'ancestors' == $key )
+			return true;
+
+		if ( 'page_template' == $key )
+			return true;
+
+		if ( 'post_category' == $key )
+		   return true;
+
+		if ( 'tags_input' == $key )
+		   return true;
+
+		return metadata_exists( 'post', $this->ID, $key );
+	}
+
+	/**
+	 * Getter.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param string $key Key to get.
+	 * @return mixed
+	 */
+	public function __get( $key ) {
+		if ( 'page_template' == $key && $this->__isset( $key ) ) {
+			return get_post_meta( $this->ID, '_wp_page_template', true );
+		}
+
+		if ( 'post_category' == $key ) {
+			if ( is_object_in_taxonomy( $this->post_type, 'category' ) )
+				$terms = get_the_terms( $this, 'category' );
+
+			if ( empty( $terms ) )
+				return array();
+
+			return wp_list_pluck( $terms, 'term_id' );
+		}
+
+		if ( 'tags_input' == $key ) {
+			if ( is_object_in_taxonomy( $this->post_type, 'post_tag' ) )
+				$terms = get_the_terms( $this, 'post_tag' );
+
+			if ( empty( $terms ) )
+				return array();
+
+			return wp_list_pluck( $terms, 'name' );
+		}
+
+		// Rest of the values need filtering.
+		if ( 'ancestors' == $key )
+			$value = get_post_ancestors( $this );
+		else
+			$value = get_post_meta( $this->ID, $key, true );
+
+		if ( $this->filter )
+			$value = sanitize_post_field( $key, $value, $this->ID, $this->filter );
+
+		return $value;
+	}
+
+	/**
+	 * {@Missing Summary}
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param string $filter Filter.
+	 * @return self|array|bool|object|WP_Post
+	 */
+	public function filter( $filter ) {
+		if ( $this->filter == $filter )
+			return $this;
+
+		if ( $filter == 'raw' )
+			return self::get_instance( $this->ID );
+
+		return sanitize_post( $this, $filter );
+	}
+
+	/**
+	 * Convert object to array.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @return array Object as array.
+	 */
+	public function to_array() {
+		$post = get_object_vars( $this );
+
+		foreach ( array( 'ancestors', 'page_template', 'post_category', 'tags_input' ) as $key ) {
+			if ( $this->__isset( $key ) )
+				$post[ $key ] = $this->__get( $key );
+		}
+
+		return $post;
+	}
+}