Jetpack-mu-wpcom: prevent PHP warnings (#39446)

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/10942529204

Upstream-Ref: Automattic/jetpack@8075a95

composer.json

@@ -4,7 +4,7 @@
 	"type": "wordpress-plugin",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"automattic/jetpack-mu-wpcom": "^5.63.0"
+		"automattic/jetpack-mu-wpcom": "^5.63.1-alpha"
 	},
 	"require-dev": {
 		"yoast/phpunit-polyfills": "^1.1.1",

vendor/automattic/jetpack-mu-wpcom/CHANGELOG.md

@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [5.63.1-alpha] - unreleased
+
+This is an alpha version! The changes listed here are not final.
+
 ## [5.63.0] - 2024-09-18
 ### Added
 - Added a shopping cart icon to the masterbar. This icon will be displayed when the user has items in the cart and liks to the checkout page. [#39298]
@@ -1238,6 +1242,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Testing initial package release.
 
+[5.63.1-alpha]: https://github.com/Automattic/jetpack-mu-wpcom/compare/v5.63.0...v5.63.1-alpha
 [5.63.0]: https://github.com/Automattic/jetpack-mu-wpcom/compare/v5.62.0...v5.63.0
 [5.62.0]: https://github.com/Automattic/jetpack-mu-wpcom/compare/v5.61.0...v5.62.0
 [5.61.0]: https://github.com/Automattic/jetpack-mu-wpcom/compare/v5.60.0...v5.61.0

vendor/automattic/jetpack-mu-wpcom/src/class-jetpack-mu-wpcom.php

@@ -15,7 +15,7 @@
  * Jetpack_Mu_Wpcom main class.
  */
 class Jetpack_Mu_Wpcom {
-	const PACKAGE_VERSION = '5.63.0';
+	const PACKAGE_VERSION = '5.63.1-alpha';
 	const PKG_DIR         = __DIR__ . '/../';
 	const BASE_DIR        = __DIR__ . '/';
 	const BASE_FILE       = __FILE__;

vendor/automattic/jetpack-mu-wpcom/src/features/custom-css/csstidy/class.csstidy-optimise.php

@@ -298,18 +298,22 @@ public function cut_color( $color ) {
 			for ( $i = 0, $l = count( $color_tmp ); $i < $l; $i++ ) {
 				$color_tmp[ $i ] = trim( $color_tmp[ $i ] );
 				if ( str_ends_with( $color_tmp[ $i ], '%' ) ) {
-					$color_tmp[ $i ] = round( ( 255 * $color_tmp[ $i ] ) / 100 );
+					$color_tmp[ $i ] = round( ( 255 * (int) substr( $color_tmp[ $i ], 0, -1 ) ) / 100 );
 				}
 				if ( $color_tmp[ $i ] > 255 ) {
 					$color_tmp[ $i ] = 255;
 				}
 			}
-			$color = '#';
-			for ( $i = 0; $i < 3; $i++ ) {
-				if ( $color_tmp[ $i ] < 16 ) {
-					$color .= '0' . dechex( $color_tmp[ $i ] );
-				} else {
-					$color .= dechex( $color_tmp[ $i ] );
+
+			if ( count( $color_tmp ) >= 3 ) {
+				$color = '#';
+
+				for ( $i = 0; $i < 3; $i++ ) {
+					if ( $color_tmp[ $i ] < 16 ) {
+						$color .= '0' . dechex( $color_tmp[ $i ] );
+					} else {
+						$color .= dechex( $color_tmp[ $i ] );
+					}
 				}
 			}
 		}
@@ -636,8 +640,11 @@ public static function merge_4value_shorthands( $array ) {
 		$shorthands = & $GLOBALS['csstidy']['shorthands'];
 
 		foreach ( $shorthands as $key => $value ) {
-			if ( $value !== 0 && isset( $array[ $value[0] ] ) && isset( $array[ $value[1] ] )
-							&& isset( $array[ $value[2] ] ) && isset( $array[ $value[3] ] ) ) {
+			if ( $value === 0 || ( is_array( $value ) && count( $value ) < 4 ) ) {
+				continue;
+			}
+
+			if ( isset( $array[ $value[0] ] ) && isset( $array[ $value[1] ] ) && isset( $array[ $value[2] ] ) && isset( $array[ $value[3] ] ) ) {
 				$return[ $key ] = '';
 
 				$important = '';