xampp CodeIgniter上PHP7的MongoDb错误

在使用PHP7在xampp中运行应用程序时，我遇到以下错误。我是mongoDb的新手。无法找出解决此问题的方法。任何关于这个问题的帮助或建议都将不胜感激。谢谢你的帮助。下面是我认为有问题的代码

错误：

遇到未捕获的异常

类型：错误

消息：找不到类“MongoClient”

文件名：C:\xampp\htdocs\Web\application\libraries\Mongo\u db.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Mongo_db
{

        private $debug;
    private $write_concerns;
    private $journal;
    private $selects = array();
    private $updates = array();
    private $wheres = array();
    private $limit  = 999999;
    private $offset = 0;
    private $sorts  = array();
    private $return_as = 'array';
    public $benchmark = array();
    public function __construct()
    {

    //Check mongodb is installed in your server otherwise display an error
    /*if ( ! class_exists('Mongo') && ! class_exists('MongoClient'))
        {
            show_error("The MongoDB PECL extension has not been installed or enabled", 500);
        }*/
    if (!class_exists('MongoDB\Driver\Manager')) {
   show_error("The MongoDB PECL extension has not been installed or enabled", 500);
}

            //get instance of CI class
            if (function_exists('get_instance'))
            {
            $this->_ci = get_instance();
            }

            else
            {
            $this->_ci = NULL;
            }

//load the config file which we have created in 'config' directory
$this->_ci->load->config('mongodb');

$config='default';
// Fetch Mongo server and database configuration from config file which we have created in 'config' directory
$config_data = $this->_ci->config->item($config);

try{
//connect to the mongodb server
$this->mb = new MongoClient('mongodb://'.$config_data['mongo_hostbase']);

//select the mongodb database

$this->db=$this->mb->selectDB($config_data['mongo_database']);

}
catch (MongoConnectionException $exception)
{
//if mongodb is not connect, then display the error
show_error('Unable to connect to Database', 500);
}

}


/**
    * --------------------------------------------------------------------------------
    * Aggregation Operation
    * --------------------------------------------------------------------------------
    *
    * Perform aggregation on mongodb collection
    *
    * @usage : $this->mongo_db->aggregate('foo', $ops = array());
    */
    public function aggregate($collection, $operation)
    {
        if (empty($collection))
        {
            show_error("In order to retreive documents from MongoDB, a collection name must be passed", 500);
        }

        if (empty($operation) && !is_array($operation))
        {
            show_error("Operation must be an array to perform aggregate.", 500);
        }

        try
        {
            $documents = $this->db->{$collection}->aggregate($operation);
            //$this->_clear();

            if ($this->return_as == 'object')
            {
                return (object)$documents;
            }
            else
            {
                return $documents;
            }
        }
        catch (MongoResultException $e)
        {

            if(isset($this->debug) == TRUE && $this->debug == TRUE)
            {
                show_error("Aggregation operation failed: {$e->getMessage()}", 500);
            }
            else
            {
                show_error("Aggregation operation failed: {$e->getMessage()}", 500);
            }
        }
    }



}
?>

电话号码：49

回溯：

文件：C:\xampp\htdocs\Web\application\controllers\Home.php行：7 函数：_构造

文件：C:\xampp\htdocs\Web\index.php行：315函数：require\u一次

库\Mongo_db.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Mongo_db
{

        private $debug;
    private $write_concerns;
    private $journal;
    private $selects = array();
    private $updates = array();
    private $wheres = array();
    private $limit  = 999999;
    private $offset = 0;
    private $sorts  = array();
    private $return_as = 'array';
    public $benchmark = array();
    public function __construct()
    {

    //Check mongodb is installed in your server otherwise display an error
    /*if ( ! class_exists('Mongo') && ! class_exists('MongoClient'))
        {
            show_error("The MongoDB PECL extension has not been installed or enabled", 500);
        }*/
    if (!class_exists('MongoDB\Driver\Manager')) {
   show_error("The MongoDB PECL extension has not been installed or enabled", 500);
}

            //get instance of CI class
            if (function_exists('get_instance'))
            {
            $this->_ci = get_instance();
            }

            else
            {
            $this->_ci = NULL;
            }

//load the config file which we have created in 'config' directory
$this->_ci->load->config('mongodb');

$config='default';
// Fetch Mongo server and database configuration from config file which we have created in 'config' directory
$config_data = $this->_ci->config->item($config);

try{
//connect to the mongodb server
$this->mb = new MongoClient('mongodb://'.$config_data['mongo_hostbase']);

//select the mongodb database

$this->db=$this->mb->selectDB($config_data['mongo_database']);

}
catch (MongoConnectionException $exception)
{
//if mongodb is not connect, then display the error
show_error('Unable to connect to Database', 500);
}

}


/**
    * --------------------------------------------------------------------------------
    * Aggregation Operation
    * --------------------------------------------------------------------------------
    *
    * Perform aggregation on mongodb collection
    *
    * @usage : $this->mongo_db->aggregate('foo', $ops = array());
    */
    public function aggregate($collection, $operation)
    {
        if (empty($collection))
        {
            show_error("In order to retreive documents from MongoDB, a collection name must be passed", 500);
        }

        if (empty($operation) && !is_array($operation))
        {
            show_error("Operation must be an array to perform aggregate.", 500);
        }

        try
        {
            $documents = $this->db->{$collection}->aggregate($operation);
            //$this->_clear();

            if ($this->return_as == 'object')
            {
                return (object)$documents;
            }
            else
            {
                return $documents;
            }
        }
        catch (MongoResultException $e)
        {

            if(isset($this->debug) == TRUE && $this->debug == TRUE)
            {
                show_error("Aggregation operation failed: {$e->getMessage()}", 500);
            }
            else
            {
                show_error("Aggregation operation failed: {$e->getMessage()}", 500);
            }
        }
    }



}
?>

config/mongodb.php

<?php

//mongodb host
$config['default']['mongo_hostbase'] = 'localhost';
//mongodb name

$config['default']['mongo_database'] = 'appname';
//mongodb username - by default, it is empty
$config['default']['mongo_username'] = 'root';
//mongodb password - by default, it is empty
$config['default']['mongo_password'] = 'root';
?>

config/mongo.php

<?php
$config['mongo_server'] = 'localhost:27017';
$config['mongo_dbname'] = 'appname';
?>

---

MongoCLient类由pecl install mongo提供。但pecl/mongo不适用于php7，因此不推荐使用pecl/mongodb。但是对于pecl/mongodb，您需要使用mongodb\Driver\Manager而不是MongoClient

---

请参阅进一步阅读。

一旦安装MongoDB，就无法直接与PHP连接。您需要安装用于PHP的MongoDB驱动程序，可以在以下URL中找到

根据操作系统的类型，您可以下载一个

一旦你做完了。您可以使用composer下载mongo库，以便开始与之交互

{
    "require": {
        "mongodb/mongodb": "^1.1"
    }
}

完成后，您的项目文件夹中将有一个供应商目录，其中包含autoload.php，该目录将自动加载供应商所需的必要库和依赖库

您可以按如下方式开始使用该库

db_connect.php

<?php
/* Require the Vendor for autoloading MongoDb Client */
include_once 'vendor/autoload.php';

/* Create the Object of Mongodb */
$mongoDB                = new MongoDB\Client;

/* Creating the database on which I will be working */
$erpDB          = $mongoDB->database_name;

<?php

include_once 'DB/db_connect.php';
/* The following creates the products collection */
$productsCollection     = $erpDB->products;

$insertedData       = $productsCollection->insertOne(
    ['_id' => $idCounter, 'product_name' => $productName, 'product_quantity' => $productQuantity]
);