php 如何擷取字串拼音首字母

例如：$str = '中華人民';

返回來 ZHRM；

下面是我百度的一個函數，但是有的情況會出錯，例如： 重慶

返回來的是 ZQ

function getfirstchar($s0) {        $firstchar_ord = ord(strtoupper($s0{0}));        if (($firstchar_ord >= 65 and $firstchar_ord <= 91)or ( $firstchar_ord >= 48 and $firstchar_ord <= 57))            return $s0{0};        $s = iconv("UTF-8", "gb2312", $s0);        $asc = ord($s{0}) * 256 + ord($s{1}) - 65536;        if ($asc >= -20319 and $asc <= -20284)            return "A";        if ($asc >= -20283 and $asc <= -19776)            return "B";        if ($asc >= -19775 and $asc <= -19219)            return "C";        if ($asc >= -19218 and $asc <= -18711)            return "D";        if ($asc >= -18710 and $asc <= -18527)            return "E";        if ($asc >= -18526 and $asc <= -18240)            return "F";        if ($asc >= -18239 and $asc <= -17923)            return "G";        if ($asc >= -17922 and $asc <= -17418)            return "H";        if ($asc >= -17417 and $asc <= -16475)            return "J";        if ($asc >= -16474 and $asc <= -16213)            return "K";        if ($asc >= -16212 and $asc <= -15641)            return "L";        if ($asc >= -15640 and $asc <= -15166)            return "M";        if ($asc >= -15165 and $asc <= -14923)            return "N";        if ($asc >= -14922 and $asc <= -14915)            return "O";        if ($asc >= -14914 and $asc <= -14631)            return "P";        if ($asc >= -14630 and $asc <= -14150)            return "Q";        if ($asc >= -14149 and $asc <= -14091)            return "R";        if ($asc >= -14090 and $asc <= -13319)            return "S";        if ($asc >= -13318 and $asc <= -12839)            return "T";        if ($asc >= -12838 and $asc <= -12557)            return "W";        if ($asc >= -12556 and $asc <= -11848)            return "X";        if ($asc >= -11847 and $asc <= -11056)            return "Y";        if ($asc >= -11055 and $asc <= -10247)            return "Z";        return null;    }

回複內容：

例如：$str = '中華人民';

返回來 ZHRM；

下面是我百度的一個函數，但是有的情況會出錯，例如： 重慶

返回來的是 ZQ

function getfirstchar($s0) {        $firstchar_ord = ord(strtoupper($s0{0}));        if (($firstchar_ord >= 65 and $firstchar_ord <= 91)or ( $firstchar_ord >= 48 and $firstchar_ord <= 57))            return $s0{0};        $s = iconv("UTF-8", "gb2312", $s0);        $asc = ord($s{0}) * 256 + ord($s{1}) - 65536;        if ($asc >= -20319 and $asc <= -20284)            return "A";        if ($asc >= -20283 and $asc <= -19776)            return "B";        if ($asc >= -19775 and $asc <= -19219)            return "C";        if ($asc >= -19218 and $asc <= -18711)            return "D";        if ($asc >= -18710 and $asc <= -18527)            return "E";        if ($asc >= -18526 and $asc <= -18240)            return "F";        if ($asc >= -18239 and $asc <= -17923)            return "G";        if ($asc >= -17922 and $asc <= -17418)            return "H";        if ($asc >= -17417 and $asc <= -16475)            return "J";        if ($asc >= -16474 and $asc <= -16213)            return "K";        if ($asc >= -16212 and $asc <= -15641)            return "L";        if ($asc >= -15640 and $asc <= -15166)            return "M";        if ($asc >= -15165 and $asc <= -14923)            return "N";        if ($asc >= -14922 and $asc <= -14915)            return "O";        if ($asc >= -14914 and $asc <= -14631)            return "P";        if ($asc >= -14630 and $asc <= -14150)            return "Q";        if ($asc >= -14149 and $asc <= -14091)            return "R";        if ($asc >= -14090 and $asc <= -13319)            return "S";        if ($asc >= -13318 and $asc <= -12839)            return "T";        if ($asc >= -12838 and $asc <= -12557)            return "W";        if ($asc >= -12556 and $asc <= -11848)            return "X";        if ($asc >= -11847 and $asc <= -11056)            return "Y";        if ($asc >= -11055 and $asc <= -10247)            return "Z";        return null;    }

可以嘗試使用這個拼音庫:

http://overtrue.me/pinyin/
http://overtrue.me/articles/2014/10/php-chinese-to-pinyin.html

可以使用 http://overtrue.me/pinyin/，開源項目

多音字沒辦法解決，除非你自己寫枚舉排除

