本文共 1468 字，大约阅读时间需要 4 分钟。

$str="这是一个测试程序1";echo getFirstCharCode($str);function getFirstCharCode($str){	$str= iconv("UTF-8","gb2312", $str);	$targetChar='*';	$i=0;		while($i
   
    ='B0'){ //汉字的开始			$t=getLetter(hexdec(bin2hex(substr($str,$i,2))));			$targetChar=$t==-1 ? '*' : $t ;			//printf("%c",$t==-1 ? '*' : $t );			break;			//$i+=2;		}		else{			$targetChar=substr($str,$i,1);			break;			//printf("%s",substr($str,$i,1));			//$i++;		}		}	if(is_numeric($targetChar)){		return chr($targetChar);	}	else{		return  $targetChar;	}}function getLetter($num){    $limit=array( //gb2312 拼音排序	    array(45217,45252), //A	    array(45253,45760), //B	    array(45761,46317), //C	    array(46318,46825), //D	    array(46826,47009), //E	    array(47010,47296), //F	    array(47297,47613), //G	    array(47614,48118), //H	    array(0,0),         //I	    array(48119,49061), //J	    array(49062,49323), //K	    array(49324,49895), //L	    array(49896,50370), //M	    array(50371,50613), //N	    array(50614,50621), //O	    array(50622,50905), //P	    array(50906,51386), //Q	    array(51387,51445), //R	    array(51446,52217), //S	    array(52218,52697), //T	    array(0,0),         //U	    array(0,0),         //V	    array(52698,52979), //W	    array(52980,53688), //X	    array(53689,54480), //Y	    array(54481,55289), //Z	);    $char_index=65;    foreach($limit as $k=>$v){        if($num>=$v[0] && $num<=$v[1]){            $char_index+=$k;            return $char_index;        }    }    return -1;}
   

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