<?php
/**
 * Function Description:${CARET}
 * Function Name: zh2py
 * ${PARAM_DOC}
 *
 * @return ${TYPE_HINT}
 * ${THROWS_DOC}
 *
 * @author 娄梦宁
 */
namespace common\util;
/**
 * 获取中文首字母
 */
class zh2py
{
    //调用方式: zh2py::conv('你想要转换的汉字'); 有多少个汉字就返回多少个字母
    //根据汉字区位表
    //我们可以看到从16-55区之间是按拼音字母排序的,所以我们只需要判断某个汉字的区位码就可以得知它的拼音首字母.
    //区位表第一部份,按拼音字母排序的.
    //16区-55区
    /*
        'A'=>0xB0A1, 'B'=>0xB0C5, 'C'=>0xB2C1, 'D'=>0xB4EE, 'E'=>0xB6EA, 'F'=>0xB7A2, 'G'=>0xB8C1,'H'=>0xB9FE,
    'J'=>0xBBF7, 'K'=>0xBFA6, 'L'=>0xC0AC, 'M'=>0xC2E8, 'N'=>0xC4C3, 'O'=>0xC5B6, 'P'=>0xC5BE,'Q'=>0xC6DA,
    'R'=>0xC8BB, 'S'=>0xC8F6, 'T'=>0xCBFA, 'W'=>0xCDDA, 'X'=>0xCEF4, 'Y'=>0xD1B9, 'Z'=>0xD4D1
    */
    private static $FirstTable = array(
        0xB0C5, 0xB2C1, 0xB4EE, 0xB6EA, 0xB7A2, 0xB8C1, 0xB9FE, 0xBBF7, 0xBFA6, 0xC0AC, 0xC2E8,
        0xC4C3, 0xC5B6, 0xC5BE, 0xC6DA, 0xC8BB, 0xC8F6, 0xCBFA, 0xCDDA, 0xCEF4, 0xD1B9, 0xD4D1, 0xD7FA
    );
    private static $FirstLetter = "ABCDEFGHJKLMNOPQRSTWXYZ";
    //区位表第二部份,不规则的,下面的字母是每个区里面对应字的拼音首字母.从网上查询整理出来的,可能会有部份错误.
    //56区-87区
    private static $SecondTable = array(
        "CJWGNSPGCGNEGYPBTYYZDXYKYGTZJNMJQMBSGZSCYJSYYFPGKBZGYDYWJKGKLJSWKPJQHYJWRDZLSYMRYPYWWCCKZNKYYG",
        "TTNGJEYKKZYTCJNMCYLQLYPYSFQRPZSLWBTGKJFYXJWZLTBNCXJJJJTXDTTSQZYCDXXHGCKBPHFFSSTYBGMXLPBYLLBHLX",
        "SMZMYJHSOJNGHDZQYKLGJHSGQZHXQGKXZZWYSCSCJXYEYXADZPMDSSMZJZQJYZCJJFWQJBDZBXGZNZCPWHWXHQKMWFBPBY",
        "DTJZZKXHYLYGXFPTYJYYZPSZLFCHMQSHGMXXSXJYQDCSBBQBEFSJYHWWGZKPYLQBGLDLCDTNMAYDDKSSNGYCSGXLYZAYPN",
        "PTSDKDYLHGYMYLCXPYCJNDQJWXQXFYYFJLEJPZRXCCQWQQSBZKYMGPLBMJRQCFLNYMYQMSQYRBCJTHZTQFRXQHXMQJCJLY",
        "QGJMSHZKBSWYEMYLTXFSYDXWLYCJQXSJNQBSCTYHBFTDCYZDJWYGHQFRXWCKQKXEBPTLPXJZSRMEBWHJLBJSLYYSMDXLCL",
        "QKXLHXJRZJMFQHXHWYWSBHTRXXGLHQHFNMGYKLDYXZPYLGGSMTCFBAJJZYLJTYANJGBJPLQGSZYQYAXBKYSECJSZNSLYZH",
        "ZXLZCGHPXZHZNYTDSBCJKDLZAYFFYDLEBBGQYZKXGLDNDNYSKJSHDLYXBCGHXYPKDJMMZNGMMCLGWZSZXZJFZNMLZZTHCS",
        "YDBDLLSCDDNLKJYKJSYCJLKWHQASDKNHCSGAGHDAASHTCPLCPQYBSZMPJLPCJOQLCDHJJYSPRCHNWJNLHLYYQYYWZPTCZG",
        "WWMZFFJQQQQYXACLBHKDJXDGMMYDJXZLLSYGXGKJRYWZWYCLZMSSJZLDBYDCFCXYHLXCHYZJQSQQAGMNYXPFRKSSBJLYXY",
        "SYGLNSCMHCWWMNZJJLXXHCHSYZSTTXRYCYXBYHCSMXJSZNPWGPXXTAYBGAJCXLYXDCCWZOCWKCCSBNHCPDYZNFCYYTYCKX",
        "KYBSQKKYTQQXFCMCHCYKELZQBSQYJQCCLMTHSYWHMKTLKJLYCXWHEQQHTQKZPQSQSCFYMMDMGBWHWLGSLLYSDLMLXPTHMJ",
        "HWLJZYHZJXKTXJLHXRSWLWZJCBXMHZQXSDZPSGFCSGLSXYMJSHXPJXWMYQKSMYPLRTHBXFTPMHYXLCHLHLZYLXGSSSSTCL",
        "SLDCLRPBHZHXYYFHBMGDMYCNQQWLQHJJCYWJZYEJJDHPBLQXTQKWHLCHQXAGTLXLJXMSLJHTZKZJECXJCJNMFBYCSFYWYB",
        "JZGNYSDZSQYRSLJPCLPWXSDWEJBJCBCNAYTWGMPAPCLYQPCLZXSBNMSGGFNZJJBZSFZYNTXHPLQKZCZWALSBCZJXSYZGWK",
        "YPSGXFZFCDKHJGXTLQFSGDSLQWZKXTMHSBGZMJZRGLYJBPMLMSXLZJQQHZYJCZYDJWFMJKLDDPMJEGXYHYLXHLQYQHKYCW",
        "CJMYYXNATJHYCCXZPCQLBZWWYTWBQCMLPMYRJCCCXFPZNZZLJPLXXYZTZLGDLTCKLYRZZGQTTJHHHJLJAXFGFJZSLCFDQZ",
        "LCLGJDJZSNZLLJPJQDCCLCJXMYZFTSXGCGSBRZXJQQCTZHGYQTJQQLZXJYLYLBCYAMCSTYLPDJBYREGKLZYZHLYSZQLZNW",
        "CZCLLWJQJJJKDGJZOLBBZPPGLGHTGZXYGHZMYCNQSYCYHBHGXKAMTXYXNBSKYZZGJZLQJTFCJXDYGJQJJPMGWGJJJPKQSB",
        "GBMMCJSSCLPQPDXCDYYKYPCJDDYYGYWRHJRTGZNYQLDKLJSZZGZQZJGDYKSHPZMTLCPWNJYFYZDJCNMWESCYGLBTZZGMSS",
        "LLYXYSXXBSJSBBSGGHFJLYPMZJNLYYWDQSHZXTYYWHMCYHYWDBXBTLMSYYYFSXJCBDXXLHJHFSSXZQHFZMZCZTQCXZXRTT",
        "DJHNRYZQQMTQDMMGNYDXMJGDXCDYZBFFALLZTDLTFXMXQZDNGWQDBDCZJDXBZGSQQDDJCMBKZFFXMKDMDSYYSZCMLJDSYN",
        "SPRSKMKMPCKLGTBQTFZSWTFGGLYPLLJZHGJJGYPZLTCSMCNBTJBQFKDHBYZGKPBBYMTDSSXTBNPDKLEYCJNYCDYKZTDHQH",
        "SYZSCTARLLTKZLGECLLKJLQJAQNBDKKGHPJTZQKSECSHALQFMMGJNLYJBBTMLYZXDXJPLDLPCQDHZYCBZSCZBZMSLJFLKR",
        "ZJSNFRGJHXPDHYJYBZGDLQCSEZGXLBLGYXTWMABCHECMWYJYZLLJJYHLGNDJLSLYGKDZPZXJYYZLWCXSZFGWYYDLYHCLJS",
        "CMBJHBLYZLYCBLYDPDQYSXQZBYTDKYXJYYCNRJMPDJGKLCLJBCTBJDDBBLBLCZQRPYXJCJLZCSHLTOLJNMDDDLNGKATHQH",
        "JHYKHEZNMSHRPHQQJCHGMFPRXHJGDYCHGHLYRZQLCYQJNZSQTKQJYMSZSWLCFQQQXYFGGYPTQWLMCRNFKKFSYYLQBMQAMM",
        "MYXCTPSHCPTXXZZSMPHPSHMCLMLDQFYQXSZYJDJJZZHQPDSZGLSTJBCKBXYQZJSGPSXQZQZRQTBDKYXZKHHGFLBCSMDLDG",
        "DZDBLZYYCXNNCSYBZBFGLZZXSWMSCCMQNJQSBDQSJTXXMBLTXZCLZSHZCXRQJGJYLXZFJPHYMZQQYDFQJJLZZNZJCDGZYG",
        "CTXMZYSCTLKPHTXHTLBJXJLXSCDQXCBBTJFQZFSLTJBTKQBXXJJLJCHCZDBZJDCZJDCPRNPQCJPFCZLCLZXZDMXMPHJSGZ",
        "GSZZQLYLWTJPFSYASMCJBTZYYCWMYTZSJJLJCQLWZMALBXYFBPNLSFHTGJWEJJXXGLLJSTGSHJQLZFKCGNNNSZFDEQFHBS",
        "AQTGYLBXMMYGSZLDYDQMJJRGBJTKGDHGKBLQKBDMBYLXWCXYTTYBKMRTJZXQJBHLMHMJJZMQASLDCYXYQDLQCAFYWYXQHZ",
    );

    public static function utf8_to_gbk($string)//编码转换,必须转换成GB2312字符,这里只是简单的判断并不是很准确,可以自己写一个.
    {
        if (mb_check_encoding($string, 'gb2312'))
            return $string;
        if (function_exists('iconv'))
            return iconv("utf-8", "gb2312//IGNORE", $string);
        return mb_convert_encoding($string, 'gb2312', 'utf-8');
    }

    public static function conv($str)
    {
        $str = self::utf8_to_gbk($str);
        $len = strlen($str);
        $newStr = '';
        for ($i = 0; $i < $len; ++$i) {
            $H = ord($str[$i]);
            $L = ord($str[$i + 1]);
            //字符集非法
            if ($H < 0xB0 || $L < 0xA1 || $H > 0xF7 || $L == 0xFF) {
                $newStr .= $str[$i];
                continue;
            }
            if ($H < 0xD8)//($H >= 0xB0 && $H <=0xD7)//查询文字在一级汉字区(16-55)
            {
                $W = ($H << 8) | $L;
                foreach (self::$FirstTable as $key => $value) {
                    if ($W < $value) {
                        $newStr .= self::$FirstLetter[$key];
                        break;
                    }
                }
            } else// if (H >= 0xD8 && H <= 0xF7)//查询中文在二级汉字区(56-87)
                $newStr .= self::$SecondTable[$H - 0xD8][$L - 0xA1];
            ++$i;
        }
        if (!empty($newStr)) {
            return strtoupper($newStr);
        } else {
            return null;
        }
    }
}