语句很简单
代码如下
<?php
$connection=mysql_connect("localhost","root","password"); //连接并选择数据库服务器
mysql_select_db("test",$connection);
$query="select * from users where name='你好'";
$result=mysql_query($query,$connection);
while($row=mysql_fetch_array($result))
{
echo "用户ID:".$row[0]."<br>"; //也可以写做$row["user_id"]
echo "用户名:".$row[1]."<br>"; //也可以写做$row["user_name"]
}
?>
运行结果提示
Error: Illegal mix of collations (gbk_chinese_ci,IMPLICIT) and (latin1_swedish_ci,COERCIBLE) for operation '='
意思是说:操作符 = 比较的字符集不一致,一个是gbk_chinese_ci,一个是latin1_swedish_ci。
首先、查看mysql的my.cnf,确认为utf8
代码如下
mysql> show variables like "%char%";
+--------------------------+-------------------------------------+
| Variable_name| Value|
+--------------------------+-------------------------------------+
| character_set_client| utf8|
| character_set_connection | utf8|
| character_set_database| latin1|
| character_set_filesystem | binary|
| character_set_results| utf8|
| character_set_server| utf8|
| character_set_system| utf8|
| character_sets_dir| D:/MySQL Server 5.0/share/charsets/ |
+--------------------------+-------------------------------------+
8 rows in set (0.00 sec)
mysql> show variables like "%coll%";
+----------------------+-------------------+
| Variable_name| Value|
+----------------------+-------------------+
| collation_connection | utf8_general_ci|
| collation_database| latin1_swedish_ci |
| collation_server| utf8_general_ci|
+----------------------+-------------------+
3 rows in set (0.00 sec)
然后将数据库中所有编码方式改为统一:
代码如下
mysql> set character_set_database=utf8;
Query OK, 0 rows affected (0.00 sec)
mysql> set collation_database= utf8_general_ci
重新查看字符集及数据表字段编码字符是否一致:
总结
utf8_bin
utf8_general_ci
utf8_unicode_ci
utf8_bin 与 utf8_general_ci 可以
utf8_bin 与 utf8_unicode_ci 可以
utf8_general_ci 与 utf8_unicode_ci 不可以