<?php
/**
* 获取汉字首字母大写接口 PHP接口源代码
*
* 接口说明:PHP 获取汉字首字母大写,例如 果创云 返回 GCY,又如 张三 返回 ZS
*
* 最后修改:2024-10-12 17:45:01
*
* @author dogstar www.yesapi.cn
*
* 来源:https://open.yesapi.cn/apicode/8887.html
*/
function ($params, $di) {
// 准备函数
function getFirstChar($s0) {
$fchar = ord(substr($s0, 0, 1));
if (($fchar >= ord("a") and $fchar <= ord("z")) or ($fchar >= ord("A") and $fchar <= ord("Z"))) return strtoupper(chr($fchar));
$s = iconv("UTF-8", "GBK", $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;
}
// 参数
$string = $params['string'];
$charlist = preg_split('/(?<!^)(?!$)/u', $string);
return implode(array_map("getFirstChar", $charlist));
}
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