How to get the first letter of Chinese pinyin in php program

This article mainly introduces the method of obtaining the first letter of Chinese pinyin in the php program. Interested friends can refer to it. I hope it will be helpful to everyone.

The code is as follows:

//php获取中文字符拼音首字母 
function getFirstCharter($str){ 
 if(empty($str)){return '';} 
 $fchar=ord($str{0}); 
 if($fchar>=ord('A')&&$fchar<=ord('z')) return strtoupper($str{0}); 
 $s1=iconv('UTF-8','gb2312',$str); 
 $s2=iconv('gb2312','UTF-8',$s1); 
 $s=$s2==$str?$s1:$str; 
 $asc=ord($s{0})*256+ord($s{1})-65536; 
 if($asc>=-20319&&$asc<=-20284) return 'A'; 
 if($asc>=-20283&&$asc<=-19776) return 'B'; 
 if($asc>=-19775&&$asc<=-19219) return 'C'; 
 if($asc>=-19218&&$asc<=-18711) return 'D'; 
 if($asc>=-18710&&$asc<=-18527) return 'E'; 
 if($asc>=-18526&&$asc<=-18240) return 'F'; 
 if($asc>=-18239&&$asc<=-17923) return 'G'; 
 if($asc>=-17922&&$asc<=-17418) return 'H'; 
 if($asc>=-17417&&$asc<=-16475) return 'J'; 
 if($asc>=-16474&&$asc<=-16213) return 'K'; 
 if($asc>=-16212&&$asc<=-15641) return 'L'; 
 if($asc>=-15640&&$asc<=-15166) return 'M'; 
 if($asc>=-15165&&$asc<=-14923) return 'N'; 
 if($asc>=-14922&&$asc<=-14915) return 'O'; 
 if($asc>=-14914&&$asc<=-14631) return 'P'; 
 if($asc>=-14630&&$asc<=-14150) return 'Q'; 
 if($asc>=-14149&&$asc<=-14091) return 'R'; 
 if($asc>=-14090&&$asc<=-13319) return 'S'; 
 if($asc>=-13318&&$asc<=-12839) return 'T'; 
 if($asc>=-12838&&$asc<=-12557) return 'W'; 
 if($asc>=-12556&&$asc<=-11848) return 'X'; 
 if($asc>=-11847&&$asc<=-11056) return 'Y'; 
 if($asc>=-11055&&$asc<=-10247) return 'Z'; 
 return null; 
}

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

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