PHP utf-8编码问题,utf8编码,数据库乱码,页面显示输出乱码_PHP
老声长谈,着是困惑很多人的问题,如果处理不好,都是乱码,说这些话并不是我对编码很精通,只是在这方面是得留神,自己总结了一点小经验(容易出现乱码的地方有php文件里面 ,数据库里面 存储 的编码 ,页面显示 ,数据传输 ):
1.在建数据库的时候,尤其是用phpMyAdmin与MYSQL打交道时候,一般都是utf-8,字段为 utf8_general_ci
数据库的设置:
在my.ini文件中查找:
[mysql]
default-character-set = utf8
[mysqld]
default-character-set = utf8
init_connect = 'SET NAMES utf8 '
全部设置为utf8
保存,重新启动mysql服务
2.在与数据打交道的时候mysql_query("set names 'utf8'");注意是:utf8,不是 utf-8
3.PHP的文件默认的编码是ANSI ,需要转换为UTF-8 ,至于怎么转换editplus就有这样的功能,“另存为”的时候有选择编码UTF-8 ,注意:不能选择:UTF-8 + BOM,如果选择这个了 ,你在处理session的时候就会出现问题,所以一定要注意.还有有的人在eclipse,Myeclipse,ZendStudio里面开发,eclipse里面默认的是ISO-8859-1,需要在“窗口 ”->“首选项 ”打开“首选项”窗口,在左侧“常规 ”->“工作空间 ”,在“文本文件编码 ”里面设置默认的编码为utf-8
4.就是PHP文件里面要说明:如
或者
复制代码 代码如下:
5.还有就是处理中文等双字节的时候也有可能出现乱码,PHP里面可以采用的有iconv,mb_convert_encoding来处理双字节,其余的可以参考PHP帮助手册
6.在补充一点(遗漏的一点),在你的程序里面你要知道数据之间的传递也有可能存在编码问题的,但是你又不知道传递过来的数据是采用的什么编码,在PHP里面提供了方法来处理的,下面是自己写的一个简单方法,可以参考一下
复制代码 代码如下:
//编码转换
function display_fileencoding($filename)
{
if(extension_loaded("mbstring"))
{
$code=mb_detect_encoding($filename);//检测字符串编码
$filename=mb_convert_encoding($filename,"UTF-8",$code);//将编码$code转换为utf-8编码
return $filename;
}
else
die("请检查系统是否正确安装配置mbstring");
}
要确保mbstring在你的php.ini中启用
7.保证以上几处编码一致就可以了!!数据库,网页输出都不会出现乱码了,如有不对的,请留言指出!!

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