本文目录一览：
- 1、PHP自定义函数获取汉字首字母的方法
- 2、求php获取首字母方法
- 3、[php教程]如何用PHP实现取字符的首字母？
- 4、php获取字符串首字母
- 5、php中怎样获取汉字拼音的首字母
- 6、[转载]PHP如何取得汉字的拼音首字母
PHP自定义函数获取汉字首字母的方法
本文实例讲述了PHP自定义函数获取汉字首字母的方法。分享给大家供大家参考，具体如下：
首字母很重要，可以进行排序使用。
城市列表等等。
?php
/*
*
Created
on
2016-12-1
*/
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;
}
$firstChar
=
getFirstCharter('');
print_r($firstChar);//输出：J
?
更多关于PHP相关内容感兴趣的读者可查看本站专题：《php常用函数与技巧总结》、《PHP数组(Array)操作技巧大全》、《php字符串(string)用法总结》、《PHP错误与异常处理方法总结》、《PHP基本语法入门教程》、《php面向对象程序设计入门教程》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》
希望本文所述对大家PHP程序设计有所帮助。
求php获取首字母方法
function ($str){
$s1 = iconv('UTF-8','gb2312',$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 $asc = -10247) return 'z';
return null;
};
这是一个传入汉字，通过汉字的ASCII码来判断汉字的首字母的方法。已经调试，可以直接使用。望测试。
[php教程]如何用PHP实现取字符的首字母？
?php
function getfirstchar($s0){
$c=ereg('[a-zA-Z]', strtoupper(substr( $s0, 0, 1 )));
if($c){
return strtoupper(substr( $s0, 0, 1 )) ;
}else{
if($fchar=ord("a") and $fchar=ord("Z") )return strtoupper($s0{0});
if(is_numeric(substr( $s0, 0, 1 ))){
$s0 =ToChinaseNum (substr( $s0, 0, 1 ));
}
$s= $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 $asc=-10247)return "Z";
return null;
}
}
function ToChinaseNum($num)
{
$char = array("零","一","二","三","四","五","六","七","八","九");
$dw = array("","十","百","千","万","亿","兆");
$retval = "";
$proZero = false;
for($i = 0;$i strlen($num);$i++)
{
if($i 0) $temp = (int)(($num % pow (10,$i+1)) / pow (10,$i));
else $temp = (int)($num % pow (10,1));
if($proZero == true $temp == 0) continue;
if($temp == 0) $proZero = true;
else $proZero = false;
if($proZero)
{
if($retval == "") continue;
$retval = $char[$temp].$retval;
}
else $retval = $char[$temp].$dw[$i].$retval;
}
if($retval == "一十") $retval = "十";
return $retval;
}
var_dump(getfirstchar("89ssss"));
?
php获取字符串首字母
他是根据汉字gb2312编码的头两个字符的范围来区分的。
识别不出很正常，因为gb2312本身包含的汉字就不全。你搜个utf8汉字转拼音的，你再修改下取个首字符。应该好点
php中怎样获取汉字拼音的首字母
//汉字转拼音（生僻字不支持）
$pinyin = $this-utf8_to("我是中文");
//汉字转拼音（生僻字不支持）
function(){
echo $this-utf8_to("我是个好人");
}
/**
* 以下是中文转拼音
* @param $s
* @param bool $isfirst
* @return string
*/
public static function utf8_to($s, $isfirst = false) {
return self::to(self::utf8_to_gb2312($s), $isfirst);
}
public static function utf8_to_gb2312($s) {
return iconv('UTF-8', 'GB2312//IGNORE', $s);
}
// 字符串必须为GB2312编码
public static function to($s, $isfirst = false) {
$res = '';
$len = strlen($s);
$pinyin_arr = self::get_pinyin_array();
for($i=0; $i$len; $i++) {
$ascii = ord($s{$i});
if($ascii 0x80) {
$ascii2 = ord($s{++$i});
$ascii = $ascii * 256 + $ascii2 - 65536;
}
if($ascii 255 $ascii 0) {
if(($ascii = 48 $ascii = 57) || ($ascii = 97 $ascii = 122)) {
$res .= $s{$i}; // 0-9 a-z
}elseif($ascii = 65 $ascii = 90) {
$res .= strtolower($s{$i}); // A-Z
}else{
$res .= '_';
}
}elseif($ascii -20319 || $ascii -10247) {
$res .= '_';
}else{
foreach($pinyin_arr as $py=$asc) {
if($asc = $ascii) {
$res .= $isfirst ? $py{0} : $py;
break;
}
}
}
}
return $res;
}
public static function to_first($s) {
$ascii = ord($s{0});
if($ascii 0xE0) {
$s = self::utf8_to_gb2312($s{0}.$s{1}.$s{2});
}elseif($ascii 0x80) {
if($ascii = 65 $ascii = 90) {
return strtolower($s{0});
}elseif($ascii = 97 $ascii = 122) {
return $s{0};
}else{
return false;
}
}
if(strlen($s) 2) {
return false;
}
$asc = ord($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 false;
}
public static function get_pinyin_array() {
static $py_arr;
if(isset($py_arr)) return $py_arr;
$k = 'a|ai|an|ang|ao|ba|bai|ban|bang|bao|bei|ben|beng|bi|bian|biao|bie|bin|bing|bo|bu|ca|cai|can|cang|cao|ce|ceng|cha|chai|chan|chang|chao|che|chen|cheng|chi|chong|chou|chu|chuai|chuan|chuang|chui|chun|chuo|ci|cong|cou|cu|cuan|cui|cun|cuo|da|dai|dan|dang|dao|de|deng|di|dian|diao|die|ding|diu|dong|dou|du|duan|dui|dun|duo|e|en|er|fa|fan|fang|fei|fen|feng|fo|fou|fu|ga|gai|gan|gang|gao|ge|gei|gen|geng|gong|gou|gu|gua|guai|guan|guang|gui|gun|guo|ha|hai|han|hang|hao|he|hei|hen|heng|hong|hou|hu|hua|huai|huan|huang|hui|hun|huo|ji|jia|jian|jiang|jiao|jie|jin|jing|jiong|jiu|ju|juan|jue|jun|ka|kai|kan|kang|kao|ke|ken|keng|kong|kou|ku|kua|kuai|kuan|kuang|kui|kun|kuo|la|lai|lan|lang|lao|le|lei|leng|li|lia|lian|liang|liao|lie|lin|ling|liu|long|lou|lu|lv|luan|lue|lun|luo|ma|mai|man|mang|mao|me|mei|men|meng|mi|mian|miao|mie|min|ming|miu|mo|mou|mu|na|nai|nan|nang|nao|ne|nei|nen|neng|ni|nian|niang|niao|nie|nin|ning|niu|nong|nu|nv|nuan|nue|nuo|o|ou|pa|pai|pan|pang|pao|pei|pen|peng|pi|pian|piao|pie|pin|ping|po|pu|qi|qia|qian|qiang|qiao|qie|qin|qing|qiong|qiu|qu|quan|que|qun|ran|rang|rao|re|ren|reng|ri|rong|rou|ru|ruan|rui|run|ruo|sa|sai|san|sang|sao|se|sen|seng|sha|shai|shan|shang|shao|she|shen|sheng|shi|shou|shu|shua|shuai|shuan|shuang|shui|shun|shuo|si|song|sou|su|suan|sui|sun|suo|ta|tai|tan|tang|tao|te|teng|ti|tian|tiao|tie|ting|tong|tou|tu|tuan|tui|tun|tuo|wa|wai|wan|wang|wei|wen|weng|wo|wu|xi|xia|xian|xiang|xiao|xie|xin|xing|xiong|xiu|xu|xuan|xue|xun|ya|yan|yang|yao|ye|yi|yin|ying|yo|yong|you|yu|yuan|yue|yun|za|zai|zan|zang|zao|ze|zei|zen|zeng|zha|zhai|zhan|zhang|zhao|zhe|zhen|zheng|zhi|zhong|zhou|zhu|zhua|zhuai|zhuan|zhuang|zhui|zhun|zhuo|zi|zong|zou|zu|zuan|zui|zun|zuo';
$v = '-20319|-20317|-20304|-20295|-20292|-20283|-20265|-20257|-20242|-20230|-20051|-20036|-20032|-20026|-20002|-19990|-19986|-19982|-19976|-19805|-19784|-19775|-19774|-19763|-19756|-19751|-19746|-19741|-19739|-19728|-19725|-19715|-19540|-19531|-19525|-19515|-19500|-19484|-19479|-19467|-19289|-19288|-19281|-19275|-19270|-19263|-19261|-19249|-19243|-19242|-19238|-19235|-19227|-19224|-19218|-19212|-19038|-19023|-19018|-19006|-19003|-18996|-18977|-18961|-18952|-18783|-18774|-18773|-18763|-18756|-18741|-18735|-18731|-18722|-18710|-18697|-18696|-18526|-18518|-18501|-18490|-18478|-18463|-18448|-18447|-18446|-18239|-18237|-18231|-18220|-18211|-18201|-18184|-18183|-18181|-18012|-17997|-17988|-17970|-17964|-17961|-17950|-17947|-17931|-17928|-17922|-17759|-17752|-17733|-17730|-17721|-17703|-17701|-17697|-17692|-17683|-17676|-17496|-17487|-17482|-17468|-17454|-17433|-17427|-17417|-17202|-17185|-16983|-16970|-16942|-16915|-16733|-16708|-16706|-16689|-16664|-16657|-16647|-16474|-16470|-16465|-16459|-16452|-16448|-16433|-16429|-16427|-16423|-16419|-16412|-16407|-16403|-16401|-16393|-16220|-16216|-16212|-16205|-16202|-16187|-16180|-16171|-16169|-16158|-16155|-15959|-15958|-15944|-15933|-15920|-15915|-15903|-15889|-15878|-15707|-15701|-15681|-15667|-15661|-15659|-15652|-15640|-15631|-15625|-15454|-15448|-15436|-15435|-15419|-15416|-15408|-15394|-15385|-15377|-15375|-15369|-15363|-15362|-15183|-15180|-15165|-15158|-15153|-15150|-15149|-15144|-15143|-15141|-15140|-15139|-15128|-15121|-15119|-15117|-15110|-15109|-14941|-14937|-14933|-14930|-14929|-14928|-14926|-14922|-14921|-14914|-14908|-14902|-14894|-14889|-14882|-14873|-14871|-14857|-14678|-14674|-14670|-14668|-14663|-14654|-14645|-14630|-14594|-14429|-14407|-14399|-14384|-14379|-14368|-14355|-14353|-14345|-14170|-14159|-14151|-14149|-14145|-14140|-14137|-14135|-14125|-14123|-14122|-14112|-14109|-14099|-14097|-14094|-14092|-14090|-14087|-14083|-13917|-13914|-13910|-13907|-13906|-13905|-13896|-13894|-13878|-13870|-13859|-13847|-13831|-13658|-13611|-13601|-13406|-13404|-13400|-13398|-13395|-13391|-13387|-13383|-13367|-13359|-13356|-13343|-13340|-13329|-13326|-13318|-13147|-13138|-13120|-13107|-13096|-13095|-13091|-13076|-13068|-13063|-13060|-12888|-12875|-12871|-12860|-12858|-12852|-12849|-12838|-12831|-12829|-12812|-12802|-12607|-12597|-12594|-12585|-12556|-12359|-12346|-12320|-12300|-12120|-12099|-12089|-12074|-12067|-12058|-12039|-11867|-11861|-11847|-11831|-11798|-11781|-11604|-11589|-11536|-11358|-11340|-11339|-11324|-11303|-11097|-11077|-11067|-11055|-11052|-11045|-11041|-11038|-11024|-11020|-11019|-11018|-11014|-10838|-10832|-10815|-10800|-10790|-10780|-10764|-10587|-10544|-10533|-10519|-10331|-10329|-10328|-10322|-10315|-10309|-10307|-10296|-10281|-10274|-10270|-10262|-10260|-10256|-10254';
$key = explode('|', $k);
$val = explode('|', $v);
$py_arr = array_combine($key, $val);
arsort($py_arr);
return $py_arr;
}
[转载]PHP如何取得汉字的拼音首字母
以上函数返回单个汉字的拼音首字母，当需要处理中文字符串时，只需要重新写一个函数，用来取得一串汉字的拼音首字母。
$s1);if($s2==$zh){$zh=$s1;}for($i=0;$istrlen($zh);$i++){$s1=substr($zh,$i,1);$p=ord($s1);if($p160){$s2=substr($zh,$i++,2);$ret.=