PHP download file cannot be decompressed

Reason:

The default character set of the windows system is gbk, the project uses uft8 encoding, and Chinese file names must be transcoded to use file_exists Check the file, otherwise it will report that the file cannot be found.

The solution under windows is to open the section noted above:

$file_name = iconv("utf-8","gbk//IGNORE",$file_name); // 特别注意！特别注意！
特别注意这里，windows下必须开转码,不然直接文件不存

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