一、检测当前字符串编码并将编码改为utf-8
1 获取当前字符串的编码
$encode = mb_detect_encoding($str, array("ASCII",'UTF-8',"GB2312","GBK",'BIG5'));
2 将字符编码改为utf-8
$str_encode = mb_convert_encoding($str, 'UTF-8', $encode);
二、函数详解
1 mb_detect_encoding ? 检测字符的编码
说明
string mb_detect_encoding ( string $str [, mixed $encoding_list = mb_detect_order() [, bool $strict = false ]] )
检测字符串 str 的编码。
参数
str待检查的字符串。
encoding_listencoding_list 是一个字符编码列表。 编码顺序可以由数组或者逗号分隔的列表字符串指定。
如果省略了 encoding_list 将会使用 detect_order。
strictstrict 指定了是否严格地检测编码。 默认是 FALSE。
返回值
检测到的字符编码,或者无法检测指定字符串的编码时返回 FALSE。
2 mb_convert_encoding ? 转换字符的编码
说明
string mb_convert_encoding ( string $str , string $to_encoding [, mixed $from_encoding = mb_internal_encoding() ] )
将 string 类型 str 的字符编码从可选的 from_encoding 转换到 to_encoding。
参数
str要编码的 string。
to_encodingstr 要转换成的编码类型。
from_encoding在转换前通过字符代码名称来指定。它可以是一个 array 也可以是逗号分隔的枚举列表。 如果没有提供 from_encoding,则会使用内部(internal)编码。
参见支持的编码。
返回值
编码后的 string。

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