_php instance of MongoDB operation class implemented by PHP

Mongo_db.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 $table = NULL;
  /** * Initializes the class, obtains the MONGO instance object/Public function __construct ($host = null, $port = NULL, $dbname = NULL, $table = NULL) {if (NULL = = $dbname) {$this->throwerror (' collection cannot be empty!
    ');
    }//Judge whether the host and port if (NULL!== $host) {$this->host = $host are passed;
    } 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; $table;
  The Public Function getversion () {return mongoclient::version; /** * Single case mode * @return mongo|null///public static function getinstance ($host =null, $port =null, $dbname =n ull, $table =null) {////if (!) (
  Self:: $instanceof instanceof Self) {//self:: $instanceof = new self ($host, $port, $dbname, $table);
  ////Return self:: $instanceof;
      /** * Insert a data * @param array $doc/Public function Insert ($doc = Array ()) {if (empty ($doc)) { $this->throwerror (' inserted data cannot be empty!
    ');
      ///Save data information try {if (! $this->db->insert ($doc)) {throw new Mongoexception (' Insert data failed ');
    The catch (Mongoexception $e) {$this->throwerror ($e->getmessage ()); /** * Inserts multiple data information * @param array $doc/Public function insertmulti ($doc = Array ()) {if Empty ($ Doc) {$this->throwerror (' The inserted data cannot be empty!
    '); }//Insert data information foreach ($doc as $key => $val) {//To determine if $val is not an array if (Is_array ($val)) {$this->insert ($val); /** * Find a record * @return Array|null */Public Function findone ($where = null) {if (null = =
        = $where) {try {if ($result = $this->db->findone ()) {return $result;
        else {throw new mongoexception (' Find data failed ');
      The catch (Mongoexception $e) {$this->throwerror ($e->getmessage ());
        } else {try {if ($result = $this->db->findone ($where)) {return $result;
        else {throw new mongoexception (' Find data failed ');
      The catch (Mongoexception $e) {$this->throwerror ($e->getmessage ());
  /** * TODO with conditional subsequent * Find all documents * @return Mongocursor */Public Function found ($where = NULL)
     {if (NULL = = $where) {try {if ($result = $this->db->find ()) {} else {     throw new Mongoexception (' Find data failed ');
      The catch (Mongoexception $e) {$this->throwerror ($e->getmessage ()); } else {try {if ($result = $this->db->find ($where)) {} else {throw new M
        Ongoexception (' Find data failed ');
      The catch (Mongoexception $e) {$this->throwerror ($e->getmessage ());
    }} $arr = Array ();
    foreach ($result as $id => $val) {$arr [] = $val;
  return $arr; /** * Gets the number of record bars * @return int/Public Function GetCount () {try {if ($count = $this-&GT;DB-&G
      T;count ()) {return $count;
      else {throw new mongoexception (' Find total failed ');
    The catch (Mongoexception $e) {$this->throwerror ($e->getmessage ()); /** * Get all database * @return Array/Public function Getdbs () {return $this->mongo->listdbs
  ();
/** * Delete database * @param null $dbname   * @return Mixed */Public function dropdb ($dbname = null) {if (null!== $dbname) {$retult = $this-&G
      T;mongo->dropdb ($dbname);
      if ($retult [' OK ']) {return TRUE;
      else {return FALSE;
  }} $this->throwerror (' Enter the name of the database to be deleted ');
  /** * Forces the link to close the database/Public function closedb () {$this->mongo->close (TRUE); /** * Output error message * @param $errorInfo error content/Public Function throwerror ($errorInfo = ') {echo "&LT;H3&G
    t; a mistake: $errorInfo  

The above is the entire contents of this article, I hope you can enjoy.