PHP Chinese string First-letter acquisition function Sharing _php instance

Copy Code code as follows:

function Chinesefirst ($STR)


{





$str = Iconv ("UTF-8", "gb2312", $str); If the program is GBK, the trip will be commented out





//Judge whether the string is all Chinese


if (Preg_match ("/^[\x7f-\xff]/", $str))


    {


$fchar =ord ($str {0});


if ($fchar >=ord ("A") and $fchar <=ord ("z")) return Strtoupper ($str {0});


$a = $str;


$val =ord ($a {0}) *256+ord ($a {1})-65536;


if ($val >=-20319 and $val <=-20284) return "A";


if ($val >=-20283 and $val <=-19776) return "B";


if ($val >=-19775 and $val <=-19219) return "C";


if ($val >=-19218 and $val <=-18711) return "D";


if ($val >=-18710 and $val <=-18527) return "E";


if ($val >=-18526 and $val <=-18240) return "F";


if ($val >=-18239 and $val <=-17923) return "G";


if ($val >=-17922 and $val <=-17418) return "H";


if ($val >=-17417 and $val <=-16475) return "J";


if ($val >=-16474 and $val <=-16213) return "K";


if ($val >=-16212 and $val <=-15641) return "L";


if ($val >=-15640 and $val <=-15166) return "M";


if ($val >=-15165 and $val <=-14923) return "N";


if ($val >=-14922 and $val <=-14915) return "O";


if ($val >=-14914 and $val <=-14631) return "P";


if ($val >=-14630 and $val <=-14150) return "Q";


if ($val >=-14149 and $val <=-14091) return "R";


if ($val >=-14090 and $val <=-13319) return "S";


if ($val >=-13318 and $val <=-12839) return "T";


if ($val >=-12838 and $val <=-12557) return "W";


if ($val >=-12556 and $val <=-11848) return "X";


if ($val >=-11847 and $val <=-11056) return "Y";


if ($val >=-11055 and $val <=-10247) return "Z";


} else


    {


return false;


    }





}