Fix For PHP 5.4.x compatibility when PMPluginRegstry singleton is loaded from serialized file

workflow/engine/classes/class.pluginRegistry.php

@@ -139,6 +139,24 @@ class PMPluginRegistry
         return self::$instance;
     }
 
+    /**
+     * Load the singleton instance from a serialized stored file
+     *
+     * @param $file
+     * @return PMPluginRegistry
+     * @throws Exception
+     */
+    public static function loadSingleton($file)
+    {
+        self::$instance = unserialize(file_get_contents($file));
+
+        if (! is_object(self::$instance) || get_class(self::$instance) != "PMPluginRegistry") {
+            throw new Exception("Can't load main PMPluginRegistry object.");
+        }
+
+        return self::$instance;
+    }
+
     /**
      * This function generates a storable representation of a value
      * param

workflow/public_html/sysGeneric.php

@@ -26,8 +26,8 @@
  * bootstrap - ProcessMaker Bootstrap
  * this file is used initialize main variables, redirect and dispatch all requests
  */
-
-
+//session_cache_limiter('none');
+//die('neyek');
 function transactionLog($transactionName){
     if (extension_loaded('newrelic')) {
         $baseName="ProcessMaker";
@@ -609,12 +609,13 @@ Bootstrap::LoadClass( 'plugin' );
 //here we are loading all plugins registered
 //the singleton has a list of enabled plugins
 $sSerializedFile = PATH_DATA_SITE . 'plugin.singleton';
-$oPluginRegistry = & PMPluginRegistry::getSingleton();
 
 if (file_exists( $sSerializedFile )) {
-    $oPluginRegistry->unSerializeInstance( file_get_contents( $sSerializedFile ) );
+    $oPluginRegistry = PMPluginRegistry::loadSingleton($sSerializedFile);
     $attributes = $oPluginRegistry->getAttributes();
     Bootstrap::LoadTranslationPlugins( defined( 'SYS_LANG' ) ? SYS_LANG : "en" , $attributes);
+} else{
+    $oPluginRegistry = PMPluginRegistry::getSingleton();
 }
 
 // setup propel definitions and logging