$ Str = SUBSTR ($ Content, 0, $ Length); Echo $ Str; Result: Double color screen really sing 30W pixel super? ... $ content is Chinese string, the last question mark, not me, is Automatic, I think it is because of 2 children of Chinese characters, why is there sometimes, sometimes there is no, and there is no regular appearance? What should this question?
There are 2 Chinese characters in the string as you define 3. The result is half of the first Chinese character with the second Chinese character. So the second Chinese character is definitely not shown.
