PHP intercepts the Chinese string not garbled method

Using PHP built-in method Mb_substr intercept Chinese not garbled, very simple to use, we refer to use it

The GBK code intercepts the sample codes as follows: $str = ' who I am '; GBK encoded string echo mb_substr ($str, 0, 1, ' GBK ');   Output my Mb_substr method has one more parameter than substr to specify the string encoding.  Utf-8 Code intercept example [code] $str = ' Who I am ABC '; UTF-8 encoded string echo mb_substr ($str, 0, 2, ' utf-8 ');   Output I A [/code mixed also completely no problem.   The use of friendship tips when you need to pay attention to the PHP file encoding, and Web page display when the code. Using this mb_substr method to know the encoding of strings in advance, if you do not know the encoding, you need to judge, Mbstring Library also provides mb_check_encoding to verify string encoding, but not perfect.