PHP test File Encoding Method Example _php instance

On the detection of file encoding, Baidu is a lot of it is, but there is no use, many people suggest mb_detect_encoding detection, but I do not know why I did not succeed, nothing output, see someone wrote an enhanced version, with the BOM to judge, I decisively ignored, this thing is completely unreliable , and finally based on the example in the PHP manual below the mb_detect_encoding function, wrote a test function,
It also includes a function to automatically detect the encoding and read the file by pointing code, and the source is presented.

Copy Code code as follows:

<?php
/**
* Detection file encoding
* @param string $file file path
* @return String|null return the encoded name or null
*/
function detect_encoding ($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 encoded read file
* @param string $file file path
* @param string $charset Read encoding
* @return string to return read content
*/
function Auto_read ($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 "";
}