mysql database scrambling to save Vietnamese scrambling solution

I test 1 myself, many characters become '? '.

The utf8 character set has been used for database connection:

define("MYSQL_ENCODE", "UTF8");
mysql_query('SET NAMES '.MYSQL_ENCODE,$conn) or die(' Character set error '.mysql_error());

For the better part of an hour, I couldn't fix it.

insert's data is still confused, suddenly thought, is the field can not save these Vietnamese.

When I look at the database character set 1, the default is gbk, which is not a problem for Chinese. When I meet the Vietnamese character set 1, the code will be confused.

Therefore, I modified the character set of the fields that might use Vietnamese to utf8 and proofread it to utf8_unicode_ci. (Here 1 must modify a specific field, modify the whole table character set, does not work, the field still retains the original character set) problem solved.

My database is php_college_web

Table: city_article

Fields in Vietnamese: title, content

So sql is implemented as follows:

ALTER TABLE city_article CHANGE title title VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_unicode_ci
ALTER TABLE city_article CHANGE content content text CHARACTER SET utf8 COLLATE utf8_unicode_ci