PHP常用函数之获取汉字首字母功能示例

//获取汉字的首字母
function getFirstCharters($str)
{
if (empty($str)) {
return '';
}
//取出参数字符串中的首个字符
$temp_str = substr($str,0,1);
if(ord($temp_str)   127){
$str = substr($str,0,3);
}else{
$str = $temp_str;
$fchar = ord($str{0});
if ($fchar  = ord('A') && $fchar <= ord('z')){
return strtoupper($temp_str);
}else{
return null;
}
}
$s1 = iconv('UTF-8', 'gb2312//IGNORE', $str);
if(empty($s1)){
return null;
}
$s2 = iconv('gb2312', 'UTF-8', $s1);
if(empty($s2)){
return null;
}
$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 && $asc <= -10247)
return 'Z';
return rare_words($asc);
}
//百家姓中的生僻字
function rare_words($asc=''){
$rare_arr = array(
-3652= array('word'= "窦",'first_char'= 'D'),
-8503= array('word'= "奚",'first_char'= 'X'),
-9286= array('word'= "酆",'first_char'= 'F'),
-7761= array('word'= "岑",'first_char'= 'C'),
-5128= array('word'= "滕",'first_char'= 'T'),
-9479= array('word'= "邬",'first_char'= 'W'),
-5456= array('word'= "臧",'first_char'= 'Z'),
-7223= array('word'= "闵",'first_char'= 'M'),
-2877= array('word'= "裘",'first_char'= 'Q'),
-6191= array('word'= "缪",'first_char'= 'M'),
-5414= array('word'= "贲",'first_char'= 'B'),
-4102= array('word'= "嵇",'first_char'= 'J'),
-8969= array('word'= "荀",'first_char'= 'X'),
-4938= array('word'= "於",'first_char'= 'Y'),
-9017= array('word'= "芮",'first_char'= 'R'),
-2848= array('word'= "羿",'first_char'= 'Y'),
-9477= array('word'= "邴",'first_char'= 'B'),
-9485= array('word'= "隗",'first_char'= 'K'),
-6731= array('word'= "宓",'first_char'= 'M'),
-9299= array('word'= "郗",'first_char'= 'X'),
-5905= array('word'= "栾",'first_char'= 'L'),
-4393= array('word'= "钭",'first_char'= 'T'),
-9300= array('word'= "郜",'first_char'= 'G'),
-8706= array('word'= "蔺",'first_char'= 'L'),
-3613= array('word'= "胥",'first_char'= 'X'),
-8777= array('word'= "莘",'first_char'= 'S'),
-6708= array('word'= "逄",'first_char'= 'P'),
-9302= array('word'= "郦",'first_char'= 'L'),
-5965= array('word'= "璩",'first_char'= 'Q'),
-6745= array('word'= "濮",'first_char'= 'P'),
-4888= array('word'= "扈",'first_char'= 'H'),
-9309= array('word'= "郏",'first_char'= 'J'),
-5428= array('word'= "晏",'first_char'= 'Y'),
-2849= array('word'= "暨",'first_char'= 'J'),
-7206= array('word'= "阙",'first_char'= 'Q'),
-4945= array('word'= "殳",'first_char'= 'S'),
-9753= array('word'= "夔",'first_char'= 'K'),
-10041= array('word'= "厍",'first_char'= 'S'),
-5429= array('word'= "晁",'first_char'= 'C'),
-2396= array('word'= "訾",'first_char'= 'Z'),
-7205= array('word'= "阚",'first_char'= 'K'),
-10049= array('word'= "乜",'first_char'= 'N'),
-10015= array('word'= "蒯",'first_char'= 'K'),
-3133= array('word'= "竺",'first_char'= 'Z'),
-6698= array('word'= "逯",'first_char'= 'L'),
-9799= array('word'= "俟",'first_char'= 'Q'),
-6749= array('word'= "澹",'first_char'= 'T'),
-7220= array('word'= "闾",'first_char'= 'L'),
-10047= array('word'= "亓",'first_char'= 'Q'),
-10005= array('word'= "仉",'first_char'= 'Z'),
-3417= array('word'= "颛",'first_char'= 'Z'),
-6431= array('word'= "驷",'first_char'= 'S'),
-7226= array('word'= "闫",'first_char'= 'Y'),
-9293= array('word'= "鄢",'first_char'= 'Y'),
-6205= array('word'= "缑",'first_char'= 'G'),
-9764= array('word'= "佘",'first_char'= 'S'),
-9818= array('word'= "佴",'first_char'= 'N'),
-9509= array('word'= "谯",'first_char'= 'Q'),
-3122= array('word'= "笪",'first_char'= 'D'),
-9823= array('word'= "佟",'first_char'= 'T'),
);
if(array_key_exists($asc, $rare_arr) && $rare_arr[$asc]['first_char']){
return $rare_arr[$asc]['first_char'] ;
}else{
return null;
}
}
//测试：
echo getFirstCharters('窦');