From 2ea3033c0d46afe3ec077b7bd66fd7158824d0ed Mon Sep 17 00:00:00 2001
From: Ian Dunn <iandunn@git.wordpress.org>
Date: Wed, 16 Dec 2020 14:03:56 +0000
Subject: [PATCH] Feed: Replace `join()` with `implode()` for safety.

Canonical functions should be used instead of aliases, because aliases can be deprecated or removed withough much notice. See r49193.

Props SergeyBiryukov.
See #51056.


git-svn-id: https://develop.svn.wordpress.org/trunk@49805 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/class-wp-simplepie-file.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/wp-includes/class-wp-simplepie-file.php b/src/wp-includes/class-wp-simplepie-file.php
index 56d3047112..beb40efbcd 100644
--- a/src/wp-includes/class-wp-simplepie-file.php
+++ b/src/wp-includes/class-wp-simplepie-file.php
@@ -87,7 +87,7 @@ class WP_SimplePie_File extends SimplePie_File {
 					if ( 'content-type' === $name ) {
 						$this->headers[ $name ] = array_pop( $value );
 					} else {
-						$this->headers[ $name ] = join( ', ', $value );
+						$this->headers[ $name ] = implode( ', ', $value );
 					}
 				}