PHP は文字プレフィックスを生成します

[PHP]代

function ff_letter_first($s0){
 $firstchar_ord=ord(strtoupper($s0{0}));
 if (($firstchar_ord>=65 and $firstchar_ord<=91)or($firstchar_ord>=48 and $firstchar_ord<=57)) return $s0{0};
 $s=iconv("UTF-8","gb2312", $s0);
 $asc=ord($s{0})*256+ord($s小贝)-65536;
 if($asc>=-20319 and $asc<=-20284)return "A";
 if($asc>=-20283 and $asc<=-19776)return "B";
 if($asc> =-19775 および $asc<=-19219)return "C";
 if($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 および $asc<=-16213)return "K";
 if($asc>=-16212 and $asc<=-15641)return "L";
 if($asc>=- 15640 および $asc<=-15166)return "M";
 if($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 0;//null
}

PHP