add DateTime support, clean up some logic

libs/plugins/shared.make_timestamp.php

@@ -18,26 +18,24 @@ function smarty_make_timestamp($string)
 {
     if(empty($string)) {
         // use "now":
-        $time = time();
-
+        return time();
+    } elseif (is_a($string,'DateTime')) {
+        return $string->getTimestamp();
     } elseif (preg_match('/^\d{14}$/', $string)) {
         // it is mysql timestamp format of YYYYMMDDHHMMSS?            
-        $time = mktime(substr($string, 8, 2),substr($string, 10, 2),substr($string, 12, 2),
+        return mktime(substr($string, 8, 2),substr($string, 10, 2),substr($string, 12, 2),
                        substr($string, 4, 2),substr($string, 6, 2),substr($string, 0, 4));
-        
     } elseif (is_numeric($string)) {
         // it is a numeric string, we handle it as timestamp
-        $time = (int)$string;
-        
+        return (int)$string;
     } else {
         // strtotime should handle it
         $time = strtotime($string);
         if ($time == -1 || $time === false) {
             // strtotime() was not able to parse $string, use "now":
-            $time = time();
+            return time();
         }
+        return $time;
     }
-    return $time;
-
 }
 ?>