From a870a6c74bb1be2241588cb3c9051fe30e180881 Mon Sep 17 00:00:00 2001
From: Rob Church <robchurch@users.mediawiki.org>
Date: Wed, 22 Aug 2007 15:05:30 +0000
Subject: [PATCH] (bug 11013) Make sure dl() is available before attempting to
 use it to check available databases in installer...this detection code is
 quite crap and could do with some work; got a partial patch, but a few bits
 (the UI, JavaScript) are broken...committing this to fix the *immediate*
 problem

---
 RELEASE-NOTES     |  2 ++
 config/index.php  |  2 +-
 install-utils.inc | 15 ++++++++++++++-
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index d94c362944..83773fd304 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -407,6 +407,8 @@ it from source control: http://www.mediawiki.org/wiki/Download_from_SVN
 * (bug 9026) Incorrect heading numbering when viewing Special:Statistics with
   "auto-numbered headings" enabled
 * Fixed invalid XHTML in Special:Upload
+* (bug 11013) Make sure dl() is available before attempting to use it to check
+  available databases in installer
 
 == API changes since 1.10 ==
 
diff --git a/config/index.php b/config/index.php
index 82b651c088..274a1531e0 100644
--- a/config/index.php
+++ b/config/index.php
@@ -295,7 +295,7 @@ error_reporting( 0 );
 $phpdatabases = array();
 foreach (array_keys($ourdb) as $db) {
 	$compname = $ourdb[$db]['compile'];
-	if (extension_loaded($compname) or dl($compname . '.' . PHP_SHLIB_SUFFIX)) {
+	if( extension_loaded( $compname ) || ( mw_have_dl() && dl( "{$compname}." . PHP_SHLIB_SUFFIX ) ) ) {
 		array_push($phpdatabases, $db);
 		$ourdb[$db]['havedriver'] = 1;
 	}
diff --git a/install-utils.inc b/install-utils.inc
index 9723e8dc26..a9892578c0 100644
--- a/install-utils.inc
+++ b/install-utils.inc
@@ -124,4 +124,17 @@ function mw_get_session_save_path() {
 	return $path;
 }
 
-?>
+/**
+ * Is dl() available to us?
+ *
+ * According to http://uk.php.net/manual/en/function.dl.php, dl()
+ * is *not* available when `enable_dl` is off, or under `safe_mode`
+ *
+ * @return bool
+ */
+function mw_have_dl() {
+	return function_exists( 'dl' )
+		&& is_callable( 'dl' )
+		&& ini_get( 'enable_dl' )
+		&& !ini_get( 'safe_mode' );
+}
\ No newline at end of file
-- 
2.20.1