From be5560de12285188d6af2c602406ed4e5977f0dc Mon Sep 17 00:00:00 2001
From: Daniel Walmsley <goldsounds@gmail.com>
Date: Thu, 23 May 2019 02:38:56 -0700
Subject: [PATCH] Warn in log if user's WP version is too old for Jetpack
 (#12341)

* Warn in log if user's WP version is too old for Jetpack

* Wrap error logging into WP_DEBUG check

This should avoid flooding folks' error logs; we'll only log it if Debugging mode is on.

See https://github.com/Automattic/jetpack/pull/12341#discussion_r284271003
---
 jetpack.php | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/jetpack.php b/jetpack.php
index 59bd488681f43..695b37db5211c 100644
--- a/jetpack.php
+++ b/jetpack.php
@@ -90,6 +90,16 @@ function jetpack_admin_unsupported_wp_notice() { ?>
 }
 
 if ( version_compare( $GLOBALS['wp_version'], JETPACK__MINIMUM_WP_VERSION, '<' ) ) {
+	if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) {
+		error_log(
+			sprintf(
+				/* translators: Placeholders are numbers, versions of WordPress in use on the site, and required by WordPress. */
+				esc_html__( 'Your version of WordPress (%1$s) is lower than the version required by Jetpack (%2$s). Please update WordPress to continue enjoying Jetpack.', 'jetpack' ),
+				$GLOBALS['wp_version'],
+				JETPACK__MINIMUM_WP_VERSION
+			)
+		);
+	}
 	add_action( 'admin_notices', 'jetpack_admin_unsupported_wp_notice' );
 	return;
 }