有没有人会写这样的算法？

myde520

比如有一个纯数字很长的字符串，如：“81939389142842242478879323877977748285982376872476888793788793248286748078922474939374768178867887932483898024928293783333242725253425322631242525267575347733333230292575763426783033302623838980”,
用PHP能不能写了一个加密同时也能解密，使原字符串加密后的长度在15位左右，还同时通过一个解密的算法将加密后的还原？

猎手酋长

赫夫曼编码最长为9bit 那么平均长度是4bit多一点  不知道楼主的最长是多少 要么用个压缩算法？ 表示没接触过，坐等楼下高手~~~

myde520

猎手酋长 发表于 2014-5-5 20:33
赫夫曼编码最长为9bit 那么平均长度是4bit多一点  不知道楼主的最长是多少 要么用个压缩算法？ 表示没接触 ...

我找到一个哈夫曼编码PHP版的，但是压缩后的字符都是乱码形式的，我是想要压缩后做网址的参数的

http://qoophp.com/archives/664

我自己写了一点点，但是写不下去了，不知道下面应该怎么再继续了

[PHP] 纯文本查看 复制代码

function jiami($str,$jj=0){
	$arr1 = array("3","4","5","6","7","8","9","0");
	$arr2= array("221","2221","22221","222221","2222221","22222221","222222221","2222222221");
	for($i=7;$i>=0;$i--){
		$str = str_replace($arr1[$i],$arr2[$i],$str);
	}
	//if(strpos($str,"3") ===false && strpos($str,"4") ===false && strpos($str,"5") ===false && strpos($str,"6") ===false && strpos($str,"7") ===false && strpos($str,"8") ===false && strpos($str,"9") ===false && strpos($str,"0") ===false ) return array("jg"=>$str,"cj"=>$jj,"len"=>strlen($str));
	if($jj>=10)return array("jg"=>$str,"cj"=>$jj,"len"=>strlen($str));
	return jiami2($str,$jj);
}

function jiami2($str,$jj){
	$arr1 = array("3","4","5","6","7","8","9","0");
	$arr2= array("1221","12221","122221","1222221","12222221","122222221","1222222221","12222222221");
	for($i=7;$i>=0;$i--){
		$str = str_replace($arr2[$i],$arr1[$i],$str);
	}
	$jj++;
	return jiami($str,$jj);
}

function jiemi($str,$jj=0){
	$arr1 = array("3","4","5","6","7","8","9","0");
	$arr2= array("221","2221","22221","222221","2222221","22222221","222222221","2222222221");
	for($i=7;$i>=0;$i--){
		$str = str_replace($arr2[$i],$arr1[$i],$str);
	}
	$jj--;
	if($jj<=0) return $str;
	return jiemi2($str,$jj);
}

function jiemi2($str,$jj){
	$arr1 = array("3","4","5","6","7","8","9","0");
	$arr2= array("1221","12221","122221","1222221","12222221","122222221","1222222221","12222222221");
	for($i=7;$i>=0;$i--){
		$str = str_replace($arr2[$i],$arr1[$i],$str);
	}
	return jiemi($str,$jj);
}

usemysql

坐等楼下高手

zengming

强烈支持楼主ing……

zengming