From 170ebfb849676f649d1961ea2d49a67333ae8cf8 Mon Sep 17 00:00:00 2001
From: Max Semenik <maxsem@users.mediawiki.org>
Date: Wed, 10 Nov 2010 16:45:28 +0000
Subject: [PATCH] Added a check for PCRE_UTF8 per report at Support desk

---
 includes/installer/Installer.i18n.php | 2 ++
 includes/installer/Installer.php      | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/includes/installer/Installer.i18n.php b/includes/installer/Installer.i18n.php
index f50eb9cecd..eb74646606 100644
--- a/includes/installer/Installer.i18n.php
+++ b/includes/installer/Installer.i18n.php
@@ -124,6 +124,8 @@ MediaWiki requires functions in this module and will not work in this configurat
 If you're running Mandrake, install the php-xml package.",
 	'config-pcre'                     => 'The PCRE support module appears to be missing.
 MediaWiki requires the Perl-compatible regular expression functions to work.',
+	'config-pcre-no-utf8'             => "'''Fatal''': PHP's PCRE module seems to be compiled without PCRE_UTF8 support.
+MediaWiki requires UTF-8 support to function correctly.",
 	'config-memory-none'              => 'PHP is configured with no <code>memory_limit</code>',
 	'config-memory-ok'                => "PHP's <code>memory_limit</code> is $1.
 OK.",
diff --git a/includes/installer/Installer.php b/includes/installer/Installer.php
index 89eb511282..1bfc4c5c49 100644
--- a/includes/installer/Installer.php
+++ b/includes/installer/Installer.php
@@ -536,6 +536,13 @@ abstract class Installer {
 			$this->showMessage( 'config-pcre' );
 			return false;
 		}
+		wfSuppressWarnings();
+		$regexd = preg_replace( '/[\x{0400}-\x{04FF}]/u', '', '-АБВГД-' );
+		wfRestoreWarnings();
+		if ( $regexd != '--' ) {
+			$this->showMessage( 'config-pcre-no-utf8' );
+			return false;
+		}
 	}
 
 	/**
-- 
2.20.1