Parse PHP to get the first letter of the pinyin of the title (with code example)

This article brings you relevant knowledge about php. It mainly introduces how to get the pinyin initials of the title in php. There are code examples. Friends who are interested can take a look below. I hope it will be helpful to everyone. help.

Get the first letter of the pinyin of the title

What needs to be noted here is the range of the ascii value of x, there may be judgments If it is empty, it has been modified.

1. Obtained by calculating the ASCII code value and comparing it with the ASCII code value of the letter.

    public function getfirstchar($s0)
    {
        $fchar = ord($s0{0});
        if($fchar >= ord("A") and $fchar <= ord("z") ) return strtoupper($s0{0});
        $s1 = mb_convert_encoding($s0,"GBK","UTF-8");//iconv("UTF-8","GBK", $s0);
        $s2 = mb_convert_encoding($s1,"UTF-8","GBK");//iconv("GBK","UTF-8", $s1);
        if($s2 == $s0){$s = $s1;}else{$s = $s0;}
        $asc = ord($s{0}) * 256 + ord($s{1}) - 65536;
        if($asc >= -20319 and $asc <= -20284) return "a";
        if($asc >= -20283 and $asc <= -19776) return "b";
        if($asc >= -19775 and $asc <= -19219) return "c";
        if($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 >= -17922 and $asc <= -17418) return "i";
        if($asc >= -17417 and $asc <= -16475) return "j";
        if($asc >= -16474 and $asc <= -16213) return "k";
        if($asc >= -16212 and $asc <= -15641) return "l";
        if($asc >= -15640 and $asc <= -15166) return "m";
        if($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 >= -22605 and $asc <= -11848) return "x";
        if($asc >= -11847 and $asc <= -11056) return "y";
        if($asc >= -11055 and $asc <= -10247) return "z";
        return NULL;
    }

Two. Get the pinyin initials of the entire title

    public function pinyin_long($zh)
    {
        $ret = "";
        if(empty($zh))
        {
            $ret="x";
        }else{
            $s1 = mb_convert_encoding($zh,"GBK","UTF-8");
            $s2 = mb_convert_encoding($s1,"UTF-8","GBK");
            if($s2 == $zh){$zh = $s1;}
            for($i = 0; $i < strlen($zh); $i++){
                $s1 = substr($zh,$i,1);
                $p = ord($s1);
                if($p > 160){
                    $s2 = substr($zh,$i++,2);
                    $ret .= $this->getfirstchar($s2);
                }else{
                    $ret .= $s1;
                }
            }
        }
        return $ret;
    }

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