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HomeBackend DevelopmentPHP Tutorial PHP iconv 跟 mb_convert_encoding 的区别

PHP iconv 和 mb_convert_encoding 的区别

PHP在字符转码时常用到 iconv 函数,但是在某次转码中遇到了个问题;

例:

$str = '今天天气-晴';

$str = iconv('UTF-8','GBK',$str,);

转码以后 $str 确只有 '今天天气晴',查找手册发现,iconv第二个参数可以添加两个后缀,

?

?//TRANSLIT 会自动将不能直接转化的字符变成一个或多个近似的字符,

?//IGNORE 会忽略掉不能转化的字符,而默认效果是从第一个非法字符截断。

?

使用:

1. 发现iconv在转换字符"-"到gb2312时会出错,如果没有ignore参数,所有该字符后面的字符串都无法被保存。不管怎么样,这个"-"都无法转换成功,无法输出。 另外mb_convert_encoding没有这个bug.

2. mb_convert_encoding 可以指定多种输入编码,它会根据内容自动识别,但是执行效率比iconv差太多;

3. 一般情况下用 iconv,只有当遇到无法确定原编码是何种编码,或者iconv转化后无法正常显示时才用mb_convert_encoding 函数.

注意:使用mb_convert_encoding 需要php.ini中开启此扩展

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