Php file encoding method _ PHP Tutorial

Php file encoding method. For file encoding detection, Baidu has always regarded it as "all", but it does not work. many people suggest mb_detect_encoding Detection. but somehow I am not successful, and I have nothing to do with file encoding detection, baidu uses Baidu refer, but it does not work. many people suggest mb_detect_encoding detection, but I don't know why I didn't succeed. I didn't output anything. I saw someone wrote an enhanced version and used BOM to judge it, I ignored it decisively. it was totally unreliable. Finally, according to the example below the mb_detect_encoding function in the PHP manual, I wrote a detection function myself,

It also includes functions and source code that automatically detect the encoding and read the file according to the instruction code.

The code is as follows:

/**

* Check the file encoding.

* @ Param string $ file path

* @ Return string | null returns the encoding name or null.

*/

Function detect_encoding ($ file ){

$ List = array ('gbk', 'utf-8', 'utf-16le', 'utf-16BE ', 'ISO-8859-1 ');

$ Str = file_get_contents ($ file );

Foreach ($ list as $ item ){

$ Tmp = mb_convert_encoding ($ str, $ item, $ item );

If (md5 ($ tmp) = md5 ($ str )){

Return $ item;

}

}

Return null;

}

/**

* Automatically parse the encoding to read the file

* @ Param string $ file path

* @ Param string $ charset read encoding

* @ Return string returns the read content

*/

Function auto_read ($ file, $ charset = 'utf-8 '){

$ List = array ('gbk', 'utf-8', 'utf-16le', 'utf-16BE ', 'ISO-8859-1 ');

$ Str = file_get_contents ($ file );

Foreach ($ list as $ item ){

$ Tmp = mb_convert_encoding ($ str, $ item, $ item );

If (md5 ($ tmp) = md5 ($ str )){

Return mb_convert_encoding ($ str, $ charset, $ item );

}

}

Return "";

}

Mb_detect_encoding detection, but I don't know why I didn't succeed. nothing...