php memcached+Mysql(主从)

/*


index.php   程序入口，用来构造sql（如查询，更新）


config.php  配置参数（memcache,mysql）


init.php    封装memcached操作(memcache连接，设置,获取)


mysqli.php  封闭mysql操作(mysql主连接，mysql从连接,mysql主更新,mysql从查询)


*/

index.php


<?php


require 'init.php';              //加载init.php


$mem = new Memcached;            //建立memcached对象,对象为$mem


/*


$mem->set('en_xx','bucuo',0,30); //测试连接memcached，用来调试很不错。


echo($mem->get('en_xx'));


$mem->set('cn_jjyy','wokao',0,30);


echo($mem->get('cn_jjyy'));


*/

require 'mysqli.php';


$sq = new Mysql;    


//下面这两个sql是人为构造的，这也可以做成一个接口                


$sql = "Select * from traffic";                   


//$sql = "insert into traffic(id,acct_mth,amount) values(14,14,46)";


//进行判断，如果sql语句中有头有select(不区分大小写)


if(preg_match ("/^select/i", $sql)){


    $mdsql = md5($sql);


    if(!$result=$mem->get('cn_'.$mdsql)){      //这里选择的是cn memcached，大家也可以根据需求在前面做个条件来将数据存取放入到另一个memcached中。


           $result = $sq->fetArray($sql); //查询是 从mysql


           foreach($result as $var){


                echo $var['amount'];


            }


           $mem->set('cn_'.$mdsql,$result,0,600); //添加到 名为cn的memcached 服务器


    }else{


            foreach($result as $var){


                echo $var['amount']."<br>";


          }


    }


}else{


    $sq->mquery($sql);     //更新是 主mysql


}

?>

config.php


<?php


$memcached = array( 


     'cn'=>array('192.168.x.y',11211),


     'en'=>array('192.168.y.x',11211)


     );


$mysql    = array( 


     'master'=>array('x','root','','test'),


     'slave_1'=>array('y','root','','test'), 


     'slave_2'=>array('z','root','','test') //可以灵活添加多台从服务器


     );


?>

init.php


<?php


class Memcached


{


private $mem;


public $pflag=''; // memcached pconnect tag


    private function memConnect($serkey){     //建立memcached连接，这些都很容易理解


                require 'config.php';


                $server = $memcached;  //$memcached是cn,en的数组


                $this->mem = new Memcache;  


                $link = !$this->pflag ? 'connect' : 'pconnect' ;


                $this->mem->$link($server[$serkey][0],$server[$serkey][1]) or $this->errordie('memcached connect error');


      }

public function set($ser_key,$values,$flag='',$expire=''){  //设置获取数据


               $this->memConnect($this->tag($ser_key));


                if($this->mem->set($ser_key,$values,$flag,$expire)) return true;


                else return false;


      }

public function get($ser_key){


               $this->memConnect($this->tag($ser_key));


               if($var=$this->mem->get($ser_key)) return $var;


               else return false;


      }


    private function tag($ser_key){


               $tag=explode('_',$ser_key);


               return $tag[0];


      }


    private function errordie($errmsg){


                die($errmsg);


      }


/*  这段函数是我用来在类中做调试用的。


    public function show($messages){


               echo $messages;


    }


*/


}


?>

mysqli.php


<?php


class Mysql


{


/* 这段函数是我用来调试的


public function show($messages){


               var_dump($messages);


    }


*/


private   $mysqlmaster;


private   $myssqlslave;

public function __construct(){   //构造函数


         require 'config.php';


         $msg = $mysql;          //$mysql是master,slave_1,slave_2


         $this->mysqlmaster = new mysqli($msg['master'][0],$msg['master'][1],$msg['master'][2],$msg['master'][3]); //master mysql


         $this->mysqlslave = $this->autotranscat($msg); // slave mysql

if(mysqli_connect_errno()){


                     printf("Connect failed: %s\n",mysqli_connect_error());


                      exit();


          }


        if(!$this->mysqlmaster->set_charset("latin1") && !$this->mysqlslave->set_charset("latin1")){


                    exit("set charset error");


          }


}


private function autotranscat($mysql){        //这段函数的作用是获取从服务器序列号，如1,2


        session_start();                      //启动会话


       $_SESSION['SID']!=0 || $_SESSION['SID']=0;  //如果不为0，就不做赋值操作(那第一次访问的话，肯定会做赋值操作的)


        if($_SESSION['SID'] >=count($mysql)-1) $_SESSION['SID'] = 1;  //上面那个动作是为这个动作准备的


        else $_SESSION['SID']++;


        $key = 'slave_'.$_SESSION['SID'];


        return new mysqli($mysql[$key][0],$mysql[$key][1],$mysql[$key][2],$mysql[$key][3]);


}

public function mquery($sql){ //mysql主 insert update


if(!$this->mysqlmaster->query($sql)){


   return false;


}


}

public function squery($sql){   //mysql从 查询


if($result=$this->mysqlslave->query($sql)){


   return $result;


}else{


   return false;


};


}


public function fetArray($sql){  //mysql从 查询 入口


if($result=$this->squery($sql)){


   while($row=$result->fetch_array(MYSQLI_ASSOC)){


    $resultraa[] = $row;


   };


   return $resultraa;


}


}


}


?>