Comments: add `__get()` and `__set()` to `WP_Comment` to provide BC for plugins that are grabbing post properties from the comment object due to an (unintended?) side effect of `JOIN`ing with the posts table in `WP_Comment_Query`, see [17667]. `'fields'` used to default to `*`, so the `JOIN` would grab every field from both tables. #YOLO

Since [34310], these properties no longer exist. We can lazy load them for plugins with the magic methods. 

Fixes #27571.

Built from https://develop.svn.wordpress.org/trunk@34583


git-svn-id: http://core.svn.wordpress.org/trunk@34547 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-comment.php

@@ -320,4 +320,43 @@ final class WP_Comment {
 
 		return false;
 	}
+
+	/**
+	 * Whether a comment has post from which to retrieve magic properties
+	 *
+	 * @since 4.4.0
+	 * @access public
+	 *
+	 * @param string $name
+	 * @return bool
+	 */
+	public function __isset( $name ) {
+		if (
+			0 === (int) $this->comment_post_ID
+			|| property_exists( $this, $name )
+		) {
+			return;
+		}
+
+		$post = get_post( $this->comment_post_ID );
+		if ( $post ) {
+			return property_exists( $post, $name );
+		}
+	}
+
+	/**
+	 * Magic getter for $post properties
+	 *
+	 * @since 4.4.0
+	 * @access public
+	 *
+	 * @param string $name
+	 * @return mixed
+	 */
+	public function __get( $name ) {
+		$post = get_post( $this->comment_post_ID );
+		if ( $post ) {
+			return $post->$name;
+		}
+	}
 }

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34582';
+$wp_version = '4.4-alpha-34583';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.