//对照表的使用$filename = "gb2utf8.txt";$fp = fopen($filename,"r");while(! feof($fp)) {list($gb,$utf8) = fgetcsv($fp,10);$charset[$gb] = $utf8;}fclose($fp);//以上读取对照表到数组备用/** gb2312到utf-8 **/function gb2utf8($text, &$charset) {//提取文本中的成分，汉字为一个元素，连续的非汉字为一个元素preg_match_all("/(?:[\x80-\xff].)|[\x01-\x7f]+/",$text,$tmp);$tmp = $tmp[0];//分离出汉字$ar = array_intersect($tmp, array_keys($charset));//替换汉字编码foreach($ar as $k=>$v)$tmp[$k] = $charset[$v];//返回换码后的串return join('',$tmp);}/** utf-8到gb2312 **/function utf82gb($text, &$charset) {$p = "/[xf0-xf7][x80-xbf]{3}|[xe0-xef][x80-xbf]{2}|[xc2-xdf][x80-xbf]|[x01-x7f]+/";preg_match_all($p,$text,$r);$utf8 = array_flip($charset);foreach($r[0] as $k=>$v)if(isset($utf8[$v]))$r[0][$k] = $utf8[$v];return join('',$r[0]);}//测试$s = gb2utf8('这是对照表的测试', $charset);echo utf82gb($s, $charset);?>复制代码
php不使用iconv库进行gb2312与utf-8编码转换的函数
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