【代码】php 中文字符串首字母函数的获取

function chineseFirst($str)


{


$str= iconv("UTF-8","gb2312", $str);//如果程序是gbk的，此行就要注释掉


//判断字符串是否全都是中文 （PS：^_^不错的php学习交流群：276167802，验证：csl，有兴趣的话可以加入进来一起讨论）


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;


}


}

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