note 91051 added to function.mb-detect-encoding

A simple way to detect UTF-8/16/32 of file by its BOM (not work with string or file without BOM) <?php // Unicode BOM is U+FEFF, but after encoded, it will look like this. define ('UTF32_BIG_ENDIAN_BOM' , chr(0x00) . chr(0x00) . chr(0xFE) . chr(0xFF)); define ('UTF32_LITTLE_ENDIAN_BOM', chr(0xFF) . chr(0xFE) . chr(0x00) . chr(0x00)); define ('UTF16_BIG_ENDIAN_BOM' , chr(0xFE) . chr(0xFF)); define ('UTF16_LITTLE_ENDIAN_BOM', chr(0xFF) . chr(0xFE)); define ('UTF8_BOM' , chr(0xEF) . chr(0xBB) . chr(0xBF)); function detect_utf_encoding($filename) { $text = file_get_contents($filename); $first2 = substr($text, 0, 2); $first3 = substr($text, 0, 3); $first4 = substr($text, 0, 3); if ($first3 == UTF8_BOM) return 'UTF-8'; elseif ($first4 == UTF32_BIG_ENDIAN_BOM) return 'UTF-32BE'; elseif ($first4 == UTF32_LITTLE_ENDIAN_BOM) return 'UTF-32LE'; elseif ($first2 == UTF16_BIG_ENDIAN_BOM) return 'UTF-16BE'; elseif ($first2 == UTF16_LITTLE_ENDIAN_BOM) return 'UTF-16LE'; } ?> ---- Server IP: 203.121.145.220 Probable Submitter: 58.8.252.58 ---- Manual Page -- http://www.php.net/manual/en/function.mb-detect-encoding.php Edit -- https://master.php.net/note/edit/91051 Del: integrated -- https://master.php.net/note/delete/91051/integrated Del: useless -- https://master.php.net/note/delete/91051/useless Del: bad code -- https://master.php.net/note/delete/91051/bad+code Del: spam -- https://master.php.net/note/delete/91051/spam Del: non-english -- https://master.php.net/note/delete/91051/non-english Del: in docs -- https://master.php.net/note/delete/91051/in+docs Del: other reasons-- https://master.php.net/note/delete/91051 Reject -- https://master.php.net/note/reject/91051 Search -- https://master.php.net/manage/user-notes.php