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PHP+MYSQL讀寫分離 – jashliao部落格

2021/12/25

jashliaoeuwordpress

PHP+MYSQL讀寫分離

資料來源:

01.Mysql主從同步的實現原理 – https://www.jb51.net/article/108313.htm

02.詳解Mysql主從同步配置實戰 – https://www.jb51.net/article/108312.htm

03.PHP+MYSQL實現讀寫分離 – https://blog.csdn.net/AnPHPer/article/details/79812902

GITHUB: https://github.com/jash-git/PHP-MYSQL-read-and-write-separation

slave_select($sql);
      $this->res=$res;
    }
    //如果不是select，就连接master服务器
    else
    {
      $res=$this->master_change($sql);
      $this->res=$res;
    }
  }
 
  /**
   * slave从库返回sql查询结果
   * @param $sql
   * @return array
   */
  private function slave_select($sql){
    //该处只是随机获取slave节点的ip，当然，还可以采用其他算法获取slave_ip
    $slave_server=$this->get_slave_ip();
    $dsn="mysql:host=$slave_server;dbname=test";
    $user='root';
    $pass='123456';
    $dbh=new PDO($dsn, $user, $pass);
    return $dbh->query($sql)->fetchAll(PDO::FETCH_ASSOC);
  }
 
  /**master主库返回sql执行结果
   * @param $sql
   * @return int
   */
  private function master_change($sql){
    $master_server='192.168.33.22';
    $dsn="mysql:host=$master_server;dbname=test";
    $user='root';
    $pass='123456';
    $dbh=new PDO($dsn, $user, $pass);
    return $dbh->exec($sql);
  }
 
  /**
   * 随机获取slave-ip
   * @return mixed
   */
  private function get_slave_ip(){
    $slave_ips=['192.168.33.33','192.168.33.44'];
    $count=count($slave_ips)-1;
    $random_key=mt_rand(0,$count);
    return $slave_ips[$random_key];
  }
 
  /**       
   * 获取结果
   * @return int
   */
  public function get_res(){
    return $this->res;
  }
}
 
$sql1 = "select * from t1";
$sql2 = "insert into t1 (name) values ('haha')";
$sql3 = "delete from t1 where id=1";
$sql4 = "update t1 set name='Jerry' where id=2";
 
$db = new Db($sql1);
//$db = new Db($sql2);
//$db = new Db($sql3);
//$db = new Db($sql4);
 
var_dump($db->get_res());