The method of PHP detecting file encoding

  about the detection of file encoding, Baidu A lot of 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 the , this thing is completely unreliable, finally according to the PHP manual in the example below the mb_detect_encoding function, wrote a detection 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 $file file path * @return string|null return encoded name or NULL/ FUNCT Ion Detect_encoding ($file) {      $list = Array (' GBK ', ' UTF-8 ', ' utf-16le ', ' utf-16be ', ' iso-8859-1 '); &nbs P     $STR = file_get_contents ($file);      foreach ($list as $item) {          $tmp = mb_convert_encoding ($str, $item, $ Item);          IF (MD5 ($tmp) = = MD5 ($STR)) {           return $it Em          }      }      return null; }  /** * Automatic parsing encoding read-in file * @param string $file file path * @param string $charset Read encoding * @return string return read content */function aut O_read ($file, $charset = ' UTF-8 ') {    $list = Array (' GBK ', ' UTF-8 ', ' utf-16le ', ' utf-16be ', ' iso-8859-1 '); &nbsp ;     $STR = file_get_contents ($file);      foreach ($list as $Item) {        $tmp = mb_convert_encoding ($str, $item, $item);         MD5 ($t MP) = = MD5 ($STR)) {             return mb_convert_encoding ($str, $charset, $item); &nb Sp              }     return "";}