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-rw-r--r--include/derivative_params.inc.php5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/derivative_params.inc.php b/include/derivative_params.inc.php
index 9fe76cd43..a84c0f854 100644
--- a/include/derivative_params.inc.php
+++ b/include/derivative_params.inc.php
@@ -19,6 +19,11 @@
// | USA. |
// +-----------------------------------------------------------------------+
+function derivative_to_url($t)
+{
+ return substr($t, 0, 2);
+}
+
function size_to_url($s)
{
if ($s[0]==$s[1])