PHP converts the encoding of all files in the folder Suitable for publishing other encoding versions of the website

The encoding of all files in the PHP conversion folder is suitable for publishing other encoding versions of the website. For example, if you have a GBK version and you want to have a UTF8 version, or you only have the source code of GBK and you want secondary development but you don’t want to change the encoding method of the IDE, you can use This program will batch convert it to UTF8

/**
 * Convert all the files in a folder. You can only convert them once, otherwise they will all become garbled. * @param string $filename
*/
function iconv_file($filename,$input_encoding='gbk',$output_encoding='utf-8')
{
 if(file_exists($filename) )
 {
 if(is_dir($filename))
 {
 foreach (glob("$filename/*") as $key=>$value)
 {
 iconv_file($value);
 }
 }
 else
 {
 $contents_before = file_get_contents($filename);
 /*$encoding = mb_detect_encoding($contents_before,array('CP936','ASCII','GBK','GB2312','UTF-8'));
 echo $encoding;
 if($encoding=='UTF-8') mb_detect_encoding function not working
 {
 return;
 }*/
 $contents_after = iconv($input_encoding,$output_encoding,$contents_before);
 file_put_contents($ filename, $contents_after);
 }
 }
 else
 {
 echo 'Parameter error';
 return false;
 }
}
iconv_file('./test');
?>