现实中我们经常看到这样的说明,排名不分先后,按姓名首字母进行排序。这是中国人大多数使用的排序方法。那么在php程序中该如何操作呢?下面就分享一下在php程序中获取汉字拼音的首字母的方法,在网上搜到的大多数是有问题的,这个可是经过作者实践应用过的,真的可以使用的哦。
//php获取中文字符拼音首字母
function getFirstCharter($str){
if(empty($str)){return '';}
$fchar=ord($str{0});
if($fchar>=ord('A')&&$fchar<=ord('z')) return strtoupper($str{0});
$s1=iconv('UTF-8','gb2312',$str);
$s2=iconv('gb2312','UTF-8',$s1);
$s=$s2==$str?$s1:$str;
$asc=ord($s{0})*256+ord($s{1})-65536;
if($asc>=-20319&&$asc<=-20284) return 'A';
if($asc>=-20283&&$asc<=-19776) return 'B';
if($asc>=-19775&&$asc<=-19219) return 'C';
if($asc>=-19218&&$asc<=-18711) return 'D';
if($asc>=-18710&&$asc<=-18527) return 'E';
if($asc>=-18526&&$asc<=-18240) return 'F';
if($asc>=-18239&&$asc<=-17923) return 'G';
if($asc>=-17922&&$asc<=-17418) return 'H';
if($asc>=-17417&&$asc<=-16475) return 'J';
if($asc>=-16474&&$asc<=-16213) return 'K';
if($asc>=-16212&&$asc<=-15641) return 'L';
if($asc>=-15640&&$asc<=-15166) return 'M';
if($asc>=-15165&&$asc<=-14923) return 'N';
if($asc>=-14922&&$asc<=-14915) return 'O';
if($asc>=-14914&&$asc<=-14631) return 'P';
if($asc>=-14630&&$asc<=-14150) return 'Q';
if($asc>=-14149&&$asc<=-14091) return 'R';
if($asc>=-14090&&$asc<=-13319) return 'S';
if($asc>=-13318&&$asc<=-12839) return 'T';
if($asc>=-12838&&$asc<=-12557) return 'W';
if($asc>=-12556&&$asc<=-11848) return 'X';
if($asc>=-11847&&$asc<=-11056) return 'Y';
if($asc>=-11055&&$asc<=-10247) return 'Z';
return null;
}
举例如下:
echo getFirstCharter('程序员');//结果将输出:C
$mysql_server_name='127.0.0.1'; //改成自己的mysql数据库服务器
$mysql_username='用户'; //改成自己的mysql数据库用户名
$mysql_password='密码'; //改成自己的mysql数据库密码
$mysql_database='数据库'; //改成自己的mysql数据库名
mysql_connect('127.0.0.1', $mysql_username,$mysql_password) or die('database not access');
mysql_select_db($mysql_database);
mysql_query("SET NAMES 'utf8'");
$equery2 = " select title from 表1 ";
$result2=mysql_query($equery2);
while ($row = mysql_fetch_array($result2, MYSQL_BOTH))
{
$title=$row["title"];
if (ord($title)>128) { //汉字开头
echo $letter=getfirstchar($title);
}else if(ord($title)>=48 and ord($title)<=57){ //数字开头
echo $letter=iconv_substr($title,0,1,'utf-8');
}else if(ord($title)>=65 and ord($title)<=90){ //大写英文开头
echo $letter=iconv_substr($title,0,1,'utf-8');
}else if(ord($title)>=97 and ord($title)<=122){ //小写英文开头
echo $letter=iconv_substr($title,0,1,'utf-8');
}
}
function getfirstchar($s0){
$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 false;
}