The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.
FRIBIDI_CHARSET_UTF8 
    (integer)
   FRIBIDI_CHARSET_8859_6 
    (integer)
   FRIBIDI_CHARSET_8859_8 
    (integer)
   FRIBIDI_CHARSET_CP1255 
    (integer)
   FRIBIDI_CHARSET_CP1256 
    (integer)
   FRIBIDI_CHARSET_ISIRI_3342 
    (integer)
   FRIBIDI_CHARSET_CAP_RTL 
    (integer)
   FRIBIDI_RTL 
    (integer)
   FRIBIDI_LTR 
    (integer)
   FRIBIDI_AUTO 
    (integer)