Description
int 
mb_strrpos ( string haystack, string needle [, string encoding] )
     mb_strrpos() returns the numeric position of
     the last occurrence of needle in the
     haystack string. If
     needle is not found, it returns FALSE.
    
     mb_strrpos() performs multi-byte safe
     strrpos() operation based on
     number of characters. needle position is
     counted from the beginning of
     haystack. First character's position is
     0. Second character position is 1. 
    
     If encoding is omitted, internal encoding
     is assumed. mb_strrpos() accepts
     string for needle where
     strrpos() accepts only character.
    
     encoding is character encoding. If it is
     not specified, internal character encoding is used.
    
     See also mb_strpos(),
     mb_internal_encoding(), 
     strrpos().