mb_strimwidth() truncates string
str to specified width. It returns truncated
string.
If trimmarker is set,
trimmarker is appended to
return value.
start is start
position offset. Number of characters from the beginning of
string. (First character is 0)
trimmarker is string
that is added to the end of string when string is
truncated.
encoding is character
encoding. If it is omitted, internal encoding is used.
See also: mb_strwidth(),
mb_internal_encoding().