119 lines
3.2 KiB
PHP
119 lines
3.2 KiB
PHP
<?php
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/*
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* @copyright QiaoQiaoShiDai Internet Technology(Shanghai)Co.,Ltd
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* @license https://www.oaooa.com/licenses/
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*
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* @link https://www.oaooa.com
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* @author zyx(zyx@oaooa.com)
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*/
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define ('UTF32_BIG_ENDIAN_BOM' , chr(0x00) . chr(0x00) . chr(0xFE) . chr(0xFF));
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define ('UTF32_LITTLE_ENDIAN_BOM', chr(0xFF) . chr(0xFE) . chr(0x00) . chr(0x00));
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define ('UTF16_BIG_ENDIAN_BOM' , chr(0xFE) . chr(0xFF));
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define ('UTF16_LITTLE_ENDIAN_BOM', chr(0xFF) . chr(0xFE));
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define ('UTF8_BOM' , chr(0xEF) . chr(0xBB) . chr(0xBF));
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class Encode_Core {
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/**
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* 文件分析方法来检查UNICODE文件，ANSI文件没有文件头，此处不分析
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*/
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private function detect_utf_encoding($text) {
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$first2 = substr($text, 0, 2);
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$first3 = substr($text, 0, 3);
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$first4 = substr($text, 0, 3);
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if ($first3 == UTF8_BOM) return 'UTF-8';
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elseif ($first4 == UTF32_BIG_ENDIAN_BOM) return 'UTF-32BE';
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elseif ($first4 == UTF32_LITTLE_ENDIAN_BOM) return 'UTF-32LE';
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elseif ($first2 == UTF16_BIG_ENDIAN_BOM) return 'UTF-16BE';
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elseif ($first2 == UTF16_LITTLE_ENDIAN_BOM) return 'UTF-16LE';
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return '';
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}
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/**
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* 检测是否GB2312编码
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* @param string $str
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* @since 2012-03-20
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* @return boolean
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*/
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private function is_gb2312($str) {
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for($i=0; $i<strlen($str); $i++) {
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$v = ord( $str[$i] );
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if( $v > 127) {
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if( ($v >= 228) && ($v <= 233) ){
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if( ($i+2) >= (strlen($str) - 1)) return true; // not enough characters
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$v1 = ord( $str[$i+1] );
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$v2 = ord( $str[$i+2] );
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if( ($v1 >= 128) && ($v1 <=191) && ($v2 >=128) && ($v2 <= 191) )
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return false;
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else
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return true; //GB编码
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}
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}
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}
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}
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private function is_GBK($str){
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$s1 = iconv('gbk','utf-8',$str);
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$s0 = iconv('utf-8','gbk',$s1);
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if($s0 == $str){
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return true;
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}else{
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return false;
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}
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}
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/**
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* 取得编码
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* @param string $str
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* @return string $encoding
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*/
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public static function get_encoding($str){
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$ary = array();
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//$ary[] = "ASCII";
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$ary[] = "UTF-8";
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$ary[] = "GB18030";//简体码
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$ary[] = "BIG-5";//繁体码
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$ary[] = "EUC-CN";
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$ary[] = "JIS";//日文编码
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$ary[] = "EUC-JP";//日文编码
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$encoding= self::detect_utf_encoding($str);
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//if(empty($encoding) && self::is_GBK($str)) return 'GBK';
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if(empty($encoding)){
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$encoding=mb_detect_encoding($str,$ary);
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}
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if($encoding=='ASCII') $encoding='UTF-8';
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return $encoding;
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}
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public function utf16_to_utf8($str) {
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$len = strlen($str);
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$dec = '';
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for ($i = 0; $i < $len; $i += 2) {
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$c = ($be) ? ord($str[$i]) << 8 | ord($str[$i + 1]) :
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ord($str[$i + 1]) << 8 | ord($str[$i]);
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if ($c >= 0x0001 && $c <= 0x007F) {
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$dec .= chr($c);
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} else if ($c > 0x07FF) {
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$dec .= chr(0xE0 | (($c >> 12) & 0x0F));
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$dec .= chr(0x80 | (($c >> 6) & 0x3F));
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$dec .= chr(0x80 | (($c >> 0) & 0x3F));
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} else {
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$dec .= chr(0xC0 | (($c >> 6) & 0x1F));
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$dec .= chr(0x80 | (($c >> 0) & 0x3F));
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}
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}
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return $dec;
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}
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}
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?>
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