Description:
------------
As posted in Internals, but not answered...

I guess interesting have in PHP one function for truncate string
*without break it*, more specifically alphanumeric chars.

PS: wordwrap() works different, see the phpt

Patch: http://ecl.zoone.com.br/etc/patches/str_truncate.patch
phpt: http://ecl.zoone.com.br/etc/patches/str_truncate.phpt

--TEST--
str_truncate
--FILE--
<?php

$str = "Lorem Ipsum is simply dummy text.";

var_dump(str_truncate($str, 25, STR_TRUNC_RIGHT));
var_dump(str_truncate($str, 25, STR_TRUNC_LEFT));
var_dump(str_truncate("foo", 1));
var_dump(str_truncate("foo", 1, 1));

?>
--EXPECT--
string(27) "Lorem Ipsum is simply dummy"
string(22) "Lorem Ipsum is simply "
string(0) ""
string(3) "foo"