最近项目有个需求，在一个中英文（包括阿拉伯数字0-9）的海量词库中，提取每一个词语的首字母：gannicus——>G自由自在——>Z 2B——>E傻X——>S复制代码代码如下:private function getfirstchar($s0){$s=iconv('UTF-8','gb2312', $s0);if (ord($s0)>128) { //汉字开头$asc=ord($s{0})*256+ord($s{1})-65536;if($asc>=-20319 and $asc if($asc>=-20283 and $asc if($asc>=-19775 and $asc if($asc>=-19218 and $asc if($asc>=-18710 and $asc if($asc>=-18526 and $asc if($asc>=-18239 and $asc if($asc>=-17922 and $asc if($asc>=-17417 and $asc if($asc>=-16474 and $asc if($asc>=-16212 and $asc if($asc>=-15640 and $asc if($asc>=-15165 and $asc if($asc>=-14922 and $asc if($asc>=-14914 and $asc if($asc>=-14630 and $asc if($asc>=-14149 and $asc if($asc>=-14090 and $asc if($asc>=-13318 and $asc if($asc>=-12838 and $asc if($asc>=-12556 and $asc if($asc>=-11847 and $asc if($asc>=-11055 and $asc }else if(ord($s)>=48 and ord($s) switch(iconv_substr($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) return substr($s,0,1);}else if(ord($s)>=97 and ord($s) return strtoupper(substr($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}}遗留问题：仍有少量词语无法提取，如亘古不灭，的G 没有提取出来
最终效果如图：
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