Index: string.xml
===================================================================
--- string.xml (revision 319643)
+++ string.xml (working copy)
@@ -147,6 +147,10 @@
vertical tab (VT or 0x0B (11) in ASCII) (since PHP 5.2.5)
+ \e
+ esc (ESC or 0x1B (27) in ASCII) (since PHP 5.4.0)
+
+
\f
form feed (FF or 0x0C (12) in ASCII) (since PHP 5.2.5)