Improve check on APCu to avoid warnings when calling apcu_cache_info()

main/inc/global.inc.php

@@ -194,8 +194,11 @@ if (!empty($_configuration['multiple_access_urls'])) {
 
 // Check if APCu is available. If so, store the value in $_configuration
 if (extension_loaded('apcu')) {
-    $_configuration['apc'] = true;
-    $_configuration['apc_prefix'] = $_configuration['main_database'].'_'.$_configuration['access_url'].'_';
+    $apcEnabled = ini_get('apc.enabled');
+    if (!empty($apcEnabled) && $apcEnabled != 'Off' && $apcEnabled != 'off') {
+        $_configuration['apc'] = true;
+        $_configuration['apc_prefix'] = $_configuration['main_database'].'_'.$_configuration['access_url'].'_';
+    }
 }
 
 $charset = 'UTF-8';