='b0'){ //汉字的开始 $t=getletter(hexdec(bin2hex(substr($str,$i,2)))); printf(%c,$t==-1 ? '*' : $t ); $i+=2; } else{ printf(%s,substr($str,$i,1)); $i++; }}function getletter($num){ global $limit; $char_index=65; foreach($limit as $k=>$v){ if($num>=$v[0] && $num $char_index+=$k; return $char_index; } } return -1;}?>
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首字母, php