php实现姓名根据首字母排序的类与方法(实例代码)

<?php
public function getfirstchar($s){
$s0 = mb_substr($s,0,3); //获取名字的姓
$s = iconv('utf-8','gb2312', $s0); //将utf-8转换成gb2312编码
//dump($s0);
if (ord($s0)>128) { //汉字开头，汉字没有以u、v开头的
$asc=ord($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 $asc<=-17760)return "g";
if($asc>=-17759 and $asc<=-17248)return "h";
if($asc>=-17247 and $asc<=-17418)return "i";
if($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 $asc<=-10247)return "z";
}else if(ord($s)>=48 and ord($s)<=57){ //数字开头
switch(iconv_substr($s,0,1,'utf-8')){
case 1:return "y";
case 2:return "e";
case 3:return "s";
case 4:return "s";
case 5:return "w";
case 6:return "l";
case 7:return "q";
case 8:return "b";
case 9:return "j";
case 0:return "l";
}
}else if(ord($s)>=65 and ord($s)<=90){ //大写英文开头
return substr($s,0,1);
}else if(ord($s)>=97 and ord($s)<=122){ //小写英文开头
return strtoupper(substr($s,0,1));
}
else
{
return iconv_substr($s0,0,1,'utf-8');
//中英混合的词语，不适合上面的各种情况，因此直接提取首个字符即可
}
}
public function addpeople()
{
$username = array('张三','马大帅','李四','王五','小二','猫蛋','狗蛋','王花','三毛','小明','李刚','张飞');
sort($username);
foreach($username as $name){
$char = $this->getfirstchar($name);
$namearray = array();
if(count($chararray[$char])!=0){
$namearray = $chararray[$char];
}
array_push($namearray,$name);
$chararray[$char] = $namearray;
}
ksort($chararray);
$this->assign('_list',$chararray);
}

<foreach name="_list" item="vo" key="k">
<p>{$k}</p>
<foreach name="vo" item="l">
<span class="name">{$l}</span>
</foreach>
</foreach>