From 7cccf527fa0558a2f1ee8502e72dfe12b48f9fa6 Mon Sep 17 00:00:00 2001
From: Igor Rozum <rozumiq@gmail.com>
Date: Fri, 23 Oct 2026 11:04:43 -0400
Subject: [PATCH] Comments: Pass an $is_trimmed argument to the
 get_comment_excerpt filter

---
 src/wp-includes/comment-template.php          |  5 +-
 .../tests/comment/getCommentExcerpt.php       | 48 +++++++++++++++++++
 2 files changed, 52 insertions(+), 1 deletion(-)

diff --git a/src/wp-includes/comment-template.php b/src/wp-includes/comment-template.php
index cc2608d4220e1..1187242c3bc3f 100644
--- a/src/wp-includes/comment-template.php
+++ b/src/wp-includes/comment-template.php
@@ -678,18 +678,21 @@ function get_comment_excerpt( $comment_id = 0 ) {
 	$comment_excerpt_length = apply_filters( 'comment_excerpt_length', $comment_excerpt_length );
 
 	$comment_excerpt = wp_trim_words( $comment_text, $comment_excerpt_length, '&hellip;' );
+	$is_trimmed      = wp_trim_words( $comment_text, $comment_excerpt_length, '' ) !== $comment_excerpt;
 
 	/**
 	 * Filters the retrieved comment excerpt.
 	 *
 	 * @since 1.5.0
 	 * @since 4.1.0 The `$comment_id` and `$comment` parameters were added.
+	 * @since 7.2.0 The `$is_trimmed` parameter was added.
 	 *
 	 * @param string     $comment_excerpt The comment excerpt text.
 	 * @param string     $comment_id      The comment ID as a numeric string.
 	 * @param WP_Comment $comment         The comment object.
+	 * @param bool       $is_trimmed      Whether the comment text was trimmed to create the excerpt.
 	 */
-	return apply_filters( 'get_comment_excerpt', $comment_excerpt, $comment->comment_ID, $comment );
+	return apply_filters( 'get_comment_excerpt', $comment_excerpt, $comment->comment_ID, $comment, $is_trimmed );
 }
 
 /**
diff --git a/tests/phpunit/tests/comment/getCommentExcerpt.php b/tests/phpunit/tests/comment/getCommentExcerpt.php
index 0a6455054a1b9..06f5063379613 100644
--- a/tests/phpunit/tests/comment/getCommentExcerpt.php
+++ b/tests/phpunit/tests/comment/getCommentExcerpt.php
@@ -43,4 +43,52 @@ public function _filter_comment_excerpt_length() {
 
 		return 10;
 	}
+
+	/**
+	 * @ticket 43792
+	 *
+	 * @dataProvider data_get_comment_excerpt_is_trimmed
+	 *
+	 * @param string $content  Comment content.
+	 * @param int    $length   Excerpt length in words.
+	 * @param bool   $expected Expected value of the `$is_trimmed` filter argument.
+	 */
+	public function test_get_comment_excerpt_filter_receives_is_trimmed( $content, $length, $expected ) {
+		$comment_id = self::factory()->comment->create(
+			array(
+				'comment_content' => $content,
+			)
+		);
+
+		$is_trimmed = null;
+		add_filter(
+			'get_comment_excerpt',
+			static function ( $excerpt, $id, $comment, $trimmed ) use ( &$is_trimmed ) {
+				$is_trimmed = $trimmed;
+				return $excerpt;
+			},
+			10,
+			4
+		);
+		add_filter(
+			'comment_excerpt_length',
+			static function () use ( $length ) {
+				return $length;
+			}
+		);
+
+		get_comment_excerpt( $comment_id );
+
+		$this->assertSame( $expected, $is_trimmed );
+	}
+
+	public function data_get_comment_excerpt_is_trimmed() {
+		return array(
+			'long comment'                        => array( self::$bacon_comment, 20, true ),
+			'short comment'                       => array( 'Short comment.', 20, false ),
+			'word count equals the limit'         => array( 'one two three four five', 5, false ),
+			'word count exceeds the limit'        => array( 'one two three four five six', 5, true ),
+			'short comment ending in an ellipsis' => array( 'Wait for it&hellip;', 20, false ),
+		);
+	}
 }