php实现过滤掉非汉字字符只保留中文字符， utf-8$str = mb_convert_encoding($str, 'utf-8', 'gb2312');preg_match_all('/[\x{4e00}-\x{9fff}]+/u', $str, $matches);$str = join('', $matches[0]);//转换 utf-8 -> gb2312$str = mb_convert_encoding($str, 'gb2312', 'utf-8'); echo $str; //输出 中文字符?>
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