php取汉字首字母 生字
时间: 2023-12-05 16:01:46 浏览: 31
PHP可以使用以下代码来取得汉字的首字母:
```php
function getFirstLetter($str){
$result = '';
for ($i=0; $i < mb_strlen($str, 'utf8'); $i++) {
$result .= getFirstChar(mb_substr($str, $i, 1, 'utf8'));
}
return $result;
}
function getFirstChar($str){
$fchar = ord(substr($str, 0, 1));
if ($fchar >= ord("A") and $fchar <= ord("Z") ) return $str;
$asc = ord($str[0])*256 + ord($str[1])-65536;
if ($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 $str;
}
$hanzi = '你好';
echo getFirstLetter($hanzi); // 输出:NH
```
以上代码是通过调用`getFirstLetter`函数来遍历输入的汉字字符串,然后调用`getFirstChar`函数来获取每个汉字的首字母。通过这样的方式,可以将汉字转换为拼音首字母。