基于php iconv函数的使用详解
unix下安装PHP的module,需要重新编译PHP,Windows下安装模板,只需将php.ini里的配置打开相应的dll就可,例如,需要加入gb库的支持,需要如下设置:
extension_dir = "C:/ipaddr/php/extensions/"
(注意,建议写全地址,并且后面加上/,很多时候是因为这里设置不对,才导致无法加载其它模块的dll的)
再打开
extension=php_gd2.dll
但如果是安装iconv.dll,按上面方法,打开php_iconv.dll后,还是无法开启iconv模块,需要如下配置:
a.上iconv的官方下载站点
http://ftp.gnu.org/pub/gnu/libiconv/
下面Windows版的iconv文件:libiconv-1.9.1.bin.woe32.zip
将这文件解压,将bin/下面的charset.dll,iconv.dll,iconv.exe拷贝到c:/windows/ (或其它的系统PATH中)
(ipaddr提醒你,这步是必须的,php_iconv.dll也是调用GNU的iconv库的,所以,先要安装GNU的iconv库)
b.开启php.ini里面的php_iconv.dll
c.重启Apache,再在phpinfo();检测是否开启iconv。
最近在做一个程序,需要用到iconv函数把抓取来过的utf-8编码的页面转成gb2312, 发现只有用iconv函数把抓取过来的数据一转码数据就会无缘无故的少一些。 让我郁闷了好一会儿,去网上一查资料才知道这是iconv函数的一个bug。iconv在转换字符"—"到gb2312时会出错
解决方法很简单,就是在需要转成的编码后加 "//IGNORE" 也就是iconv函数第二个参数后.如下:
以下为引用的内容:
iconv("UTF-8","GB2312//IGNORE",$data)
ignore的意思是忽略转换时的错误,如果没有ignore参数,所有该字符后面的字符串都无法被保存。
这个iconv()这个函数,在php5中是内置的.谢谢.
列子
复制代码 代码如下:
echo $str= '你好,这里是卖咖啡!';
echo '
';
echo iconv('GB2312', 'UTF-8', $str); //将字符串的编码从GB2312转到UTF-8
echo '
';
echo iconv_substr($str, 1, 1, 'UTF-8'); //按字符个数截取而非字节
print_r(iconv_get_encoding()); //得到当前页面编码信息
echo iconv_strlen($str, 'UTF-8'); //得到设定编码的字符串长度
//也有这样用的
$content = iconv("UTF-8","gbk//TRANSLIT",$content);
?>

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