This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change in a future release of PHP without notice. Be warned and use this function at your own risk.
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.