Revert "Comment template: Call comment_class() before recursing int…

…o child comments (#40455)"

This reverts commit caf7b7d.

packages/block-library/src/comment-template/index.php

@@ -8,8 +8,6 @@
 /**
  * Function that recursively renders a list of nested comments.
  *
- * @global int $comment_depth
- *
  * @param WP_Comment[] $comments        The array of comments.
  * @param WP_Block     $block           Block instance.
  * @return string
@@ -33,17 +31,6 @@ function block_core_comment_template_render_comments( $comments, $block ) {
 
 		$children = $comment->get_children();
 
-		/*
-		 * We need to create the CSS classes BEFORE recursing into the children.
-		 * This is because comment_class() uses globals like `$comment_alt`
-		 * and `$comment_thread_alt` which are order-sensitive.
-		 *
-		 * The `false` parameter at the end means that we do NOT want the function
-		 * to `echo` the output but to return a string.
-		 * See https://developer.wordpress.org/reference/functions/comment_class/#parameters.
-		 */
-		$comment_classes = comment_class( '', $comment->comment_ID, $comment->comment_post_ID, false );
-
 		// If the comment has children, recurse to create the HTML for the nested
 		// comments.
 		if ( ! empty( $children ) ) {
@@ -56,6 +43,10 @@ function block_core_comment_template_render_comments( $comments, $block ) {
 			$comment_depth -= 1;
 		}
 
+		// The `false` parameter at the end means that we do NOT want the function to `echo` the output but to return a string.
+		// See https://developer.wordpress.org/reference/functions/comment_class/#parameters.
+		$comment_classes = comment_class( '', $comment->comment_ID, $comment->comment_post_ID, false );
+
 		$content .= sprintf( '<li id="comment-%1$s" %2$s>%3$s</li>', $comment->comment_ID, $comment_classes, $block_content );
 	}