Using PHP to realize short domain name Mutual transfer

How to use PHP to achieve a short domain name mutual transfer? The following code can help you realize that very simply, need a friend can refer to the following copy code code as follows:

/**


* Short domain name generation & Resolution Class
  */


class Build_url {





private $mem;


private $base _url = ' http://xxx.com/';





Public Function __construct () {


$mem _conf = Array (


Array (


' host ' => ' 192.168.10.90 ',


' Port ' => ' 11116 '


                 ),


Array (


' host ' => ' 192.168.10.90 ',


' Port ' => ' 11117 '


                 ),


);


$this->mem = new Memcache ();


foreach ($mem _conf as $v) {


$this->mem->addserver ($v [' Host '], $v [' Port ']);


         }


     }





Public Function encode ($url) {


$url = Trim ($url);


if (!preg_match ("#^[http://|https://|ftp://] #iS", $url)) {


return false;


         }


$MD 5 = MD5 ($url);


$aid = $this->mem->get ($md 5);


if (! $aid) {


if (($aid = $this->mem->increment (' auto_increment_id ')) = = False) {


$this->mem->set (' auto_increment_id ', 10000);


$aid = $this->mem->increment (' auto_increment_id ');


             }


$this->mem->set ($MD 5, $aid);


$key = $this->dec2any ($aid);


$this->mem->set ($key, $url);


} else {


$key = $this->dec2any ($aid);


         }





return $this->base_url. $key;


     }





Public Function decode ($url) {


$key = Str_replace ($this->base_url, ", Trim ($url));


return $this->mem->get ($key);


     }





Private Function Dec2any ($num, $base =62, $index =false) {


$out = ';


if (! $base) {


$base = strlen ($index);


} else if (! $index) {


$index = substr ("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ", 0, $base);


         }


$t = ($num = = 0)? 0:floor (log10 ($num)/log10 ($base));


for ($t; $t >= 0; $t-) {


$a = Floor ($num/pow ($base, $t));


$out = $out. substr ($index, $a, 1);


$num = $num-($a * POW ($base, $t));


         }


return $out;


     }


 }





$app = new Build_url ();


$url = Array (


' http://www.baidu.com ',


' http://www.google.com ',


' Http://www.jb51.net '


 );


foreach ($url as $v) {


$sort = $app->encode ($v);


echo "Sort link:". $sort. " n ";


$original = $app->decode ($sort);


echo "Original:". $original. " n ";


 }


?>