edit_comment(): int|WP_Error

54function edit_comment() {55	if ( ! current_user_can( 'edit_comment', (int) $_POST['comment_ID'] ) ) {56		wp_die( __( 'Sorry, you are not allowed to edit comments on this post.' ) );57	}58 59	if ( isset( $_POST['newcomment_author'] ) ) {60		$_POST['comment_author'] = $_POST['newcomment_author'];61	}62	if ( isset( $_POST['newcomment_author_email'] ) ) {63		$_POST['comment_author_email'] = $_POST['newcomment_author_email'];64	}65	if ( isset( $_POST['newcomment_author_url'] ) ) {66		$_POST['comment_author_url'] = $_POST['newcomment_author_url'];67	}68	if ( isset( $_POST['comment_status'] ) ) {69		$_POST['comment_approved'] = $_POST['comment_status'];70	}71	if ( isset( $_POST['content'] ) ) {72		$_POST['comment_content'] = $_POST['content'];73	}74	if ( isset( $_POST['comment_ID'] ) ) {75		$_POST['comment_ID'] = (int) $_POST['comment_ID'];76	}77 78	if ( isset( $_POST['comment_parent'] ) ) {79		$comment_id     = (int) $_POST['comment_ID'];80		$comment_parent = (int) $_POST['comment_parent'];81 82		$_POST['comment_parent'] = $comment_parent;83 84		$comment = get_comment( $comment_id );85 86		if ( $comment && $comment_parent && $comment_parent !== (int) $comment->comment_parent ) {87			if ( ! get_option( 'thread_comments' ) ) {88				return new WP_Error( 'comment_parent_invalid', __( 'The comment parent cannot be changed because threaded comments are disabled.' ) );89			}90 91			if ( $comment_parent === $comment_id ) {92				return new WP_Error( 'comment_parent_invalid', __( 'A comment cannot be a reply to itself.' ) );93			}94 95			$parent              = get_comment( $comment_parent );96			$parent_status       = $parent ? wp_get_comment_status( $parent ) : false;97			$comment_status      = $_POST['comment_approved'] ?? $comment->comment_approved;98			$comment_is_approved = in_array( $comment_status, array( 1, '1', 'approve' ), true );99 100			// The parent must be a comment of the same type, on the same post, and publicly visible if the comment is approved.101			if (102				! $parent103				|| (int) $parent->comment_post_ID !== (int) $comment->comment_post_ID104				|| $parent->comment_type !== $comment->comment_type105				|| in_array( $parent_status, array( 'spam', 'trash' ), true )106				|| ( $comment_is_approved && 'approved' !== $parent_status )107			) {108				return new WP_Error( 'comment_parent_invalid', __( 'Invalid parent comment.' ) );109			}110 111			// Walk up the new parent's ancestors to prevent creating a threading loop.112			$ancestors    = array();113			$ancestor     = $parent;114			$parent_depth = 1;115 116			while ( $ancestor && $ancestor->comment_parent && ! isset( $ancestors[ $ancestor->comment_ID ] ) ) {117				if ( (int) $ancestor->comment_parent === $comment_id ) {118					return new WP_Error( 'comment_parent_invalid', __( 'A comment cannot be a reply to one of its own replies.' ) );119				}120 121				$ancestors[ $ancestor->comment_ID ] = true;122				++$parent_depth;123 124				$ancestor = get_comment( $ancestor->comment_parent );125			}126 127			$max_thread_depth = (int) get_option( 'thread_comments_depth' );128 129			if ( $max_thread_depth ) {130				/*131				 * The comment's replies move with it, so the whole subtree must stay within132				 * the maximum depth. Measure its height one level of replies at a time,133				 * stopping as soon as the subtree cannot fit, which also bounds the loop