php实现的mongodb操作类_PHP

<?php
 
/**
 * Created by PhpStorm.
 * User: yangyulong
 * Date: 2015/5/26
 * Time: 13:45
 */
class Mongo_db
{
  private static $instanceof = NULL;
  public $mongo;
  private $host = 'localhost';
  private $port = '27017';
 
  private $db;
  public $dbname;
  private $table = NULL;
 
  /**
   * 初始化类，得到mongo的实例对象
   */
  public function __construct($host = NULL, $port = NULL, $dbname = NULL, $table = NULL)
  {
 
    if (NULL === $dbname) {
      $this->throwError('集合不能为空！');
    }
 
    //判断是否传递了host和port
    if (NULL !== $host) {
      $this->host = $host;
    }
 
    if (NULL !== $port) {
      $this->port = $port;
    }
 
    $this->table = $table;
 
    $this->mongo = new MongoClient($this->host . ':' . $this->port);
    if ($this->getVersion() >= '0.9.0') {
      $this->dbname = $this->mongo->selectDB($dbname);
      $this->db = $this->dbname->selectCollection($table);
    } else {
      $this->db = $this->mongo->$dbname->$table;
    }
  }
 
  public function getVersion()
  {
    return MongoClient::VERSION;
  }
 
  /**
   * 单例模式
   * @return Mongo|null
   */
  //public static function getInstance($host=null, $port=null, $dbname=null, $table=null){
  //
  //  if(!(self::$instanceof instanceof self)){
  //    self::$instanceof = new self($host, $port, $dbname, $table);
  //  }
  //
  //  return self::$instanceof;
  /