php，修剪utf8编码的字符串

Question

lets say there is an product list page, where product names and descriptions are listed. The description cant be longer than 20 characters. Its very easy to do in php... until I met the utf8 characters

here is a text from my native language: női dolog

but I cut it at the worst place, the ő character damages:

here is a text from my native language: n�

how to dodge it? I tried to utf encode and decode it, with less success. Ideas?

Answer 1

Use the encoding aware mb functions:

echo mb_substr($string, 0, 20, 'UTF-8');

For more information, read What Every Programmer Absolutely, Positively Needs To Know About Encodings And Character Sets To Work With Text.