php操作MongoDB类实例


            本文实例讲述了php操作MongoDB类的方法。分享给大家供大家参考。具体如下：

1. MyMongo.php文件：





<?php

/**

 * 仿写CI的MongoDB

 * @author sparkHuang 2011-11-03

 *

 */

class MyMongo {

  private $mongo_config = "mongo_config.php";

  private $connection;

  private $db;

  private $mongo_connect_string;

  private $host;

  private $port;

  private $user;

  private $pass;

  private $dbname;

  private $persist;

  private $persist_key;

  private $selects = array();

  private $wheres = array();

  private $sorts = array();

  private $limit = 999999;

  private $offset = 0;

  public function __construct() {

    if ( ! class_exists('Mongo')) {

      $this->log_error("The MongoDB PECL extentiosn has not been installed or enabled.");

      exit;

    }

    

    $this->connection_string();

    $this->connect();

  }

  /**

   * 更改数据库

   *

   */

  public function switch_db($database = '') {

    if (empty($database)) {

      $this->log_error("To switch MongoDB databases, a new database name must be specified");

      exit;

    }

    $this->dbname = $database;

    try {

      $this->db = $this->connection->{$this->dbname};

      return true;

    } catch(Exception $e) {

      $this->log_error("Unable to switch Mongo Databases: {$e->getMessage()}");

      exit;

    }

  }

  /**

   * 设置select字段

   *

   */

  public function select($includs = array(), $excludes = array()) {

    if ( ! is_array($includs)) {

      $includs = (array)$includs;

    }

    

    if ( ! is_array($excludes)) {

      $excludes = (array)$excludes;

    }

    

    if ( ! empty($includs)) {

      foreach ($includs as $col) {

        $this->selects[$col] = 1;

      }

    } else {

      foreach ($excludes as $col) {

        $this->selects[$col] = 0;

      }

    }

    

    return($this);

  }

  /**

   * where条件查询判断

   *

   * @usage = $this->mongo_db->where(array('foo' => 'bar'))->get('foobar');

   *

   */

  public function where($wheres = array()) {

    if ( ! is_array($wheres)) {

      $wheres = (array)$wheres;

    }

    

    if ( ! empty($wheres)) {

      foreach($wheres as $wh => $val) {

        $this->wheres[$wh] = $val;

      }

    }

    

    return($this);

  }

  /**

   * where ... in .. 条件查询判断

   *

   * @usage = $this->mongo_db->where_in('foo', array('bar', 'zoo'))->get('foobar');

   *

   */

  public function where_in($field = '', $in = array()) {

    $this->where_init($field);

    $this->wheres[$field]['$in'] = $in;

    return($this);

  }

  /**

   * where ... not in .. 条件查询判断

   *

   * @usage = $this->mongo_db->where_not_in('foo', array('bar', 'zoo'))->get('foobar');

   *

   */

  public function where_not_in($field = '', $in = array()) {

    $this->where_init($field);

    $this->wheres[$field]['$nin'] = $in;

    return($this);

  }

  /**

   * where ... $field > $x .. 条件查询判断

   *

   * @usage = $this->mongo_db->where_gt('foo', 20)->get('foobar');

   *

   */

  public function where_gt($field = '', $x) {

    $this->where_init($field);

    $this->wheres[$field]['$gt'] = $x;

    return($this);

  }

  /**

   * where ... $field >= $x .. 条件查询判断

   *

   * @usage = $this->mongo_db->where_gte('foo', 20)->get('foobar');

   *

   */

  public function where_gte($field = '', $x) {

    $this->where_init($field);

    $this->wheres[$field]['$gte'] = $x;

    return($this);

  }

  /**

   * where ... $field < $x .. 条件查询判断

   *

   * @usage = $this->mongo_db->where_lt('foo', 20)->get('foobar');

   *

   */

  public function where_lt($field = '', $x) {

    $this->where_init($field);

    $this->wheres[$field]['$lt'] = $x;

    return($this);

  }

  /**

   * where ... $field <= $x .. 条件查询判断

   *

   * @usage = $this->mongo_db->where_lte('foo', 20)->get('foobar');

   *

   */

  public function where_lte($field = '', $x) {

    $this->where_init($field);

    $this->wheres[$field]['$lte'] = $x;

    return($this);

  }

  /**

   * where ... $field >= $x AND $field <= $y .. 条件查询判断

   *

   * @usage = $this->mongo_db->where_between('foo', 20, 30)->get('foobar');

   *

   */

  public function where_between($field = '', $x, $y) {

    $this->where_init($field);

    $this->wheres[$field]['$gte'] = $x;

    $this->wheres[$field]['$lte'] = $y;

    return($this);

  }

  /**

   * where ... $field > $x AND $field < $y .. 条件查询判断

   *

   * @usage = $this->mongo_db->where_between_ne('foo', 20, 30)->get('foobar');

   *

   */

  public function where_between_ne($field = '', $x, $y) {

    $this->where_init($field);

    $this->wheres[$field]['$gt'] = $x;

    $this->wheres[$field]['$lt'] = $y;

    return($this);

  }

  /**

   * where ... $field <> $x .. 条件查询判断

   *

   * @usage = $this->mongo_db->where_ne('foo', 20)->get('foobar');

   *

   */

  public function where_ne($field = '', $x) {

    $this->where_init($field);

    $this->wheres[$field]['$ne'] = $x;

    return($this);

  }

  /**

   * where ... or .. 条件查询判断

   *

   * @usage = $this->mongo_db->where_or('foo', array('foo', 'bar'))->get('foobar');

   *

   */

  public function where_or($field = '', $values) {

    $this->where_init($field);

    $this->wheres[$field]['$or'] = $values;

    return($this);

  }

  /**

   *  where ... and .. 条件查询判断

   *  

   *  @usage = $this->mongo_db->where_and( array ( 'foo' => 1, 'b' => 'someexample' );

   */

   public function where_and( $elements_values = array() ) {

     foreach ( $elements_values as $element => $val ) {

       $this->wheres[$element] = $val;

     }

     return($this);

   }

  /**

   *  where $field % $num = $result

   *

   *  @usage = $this->mongo_db->where_mod( 'foo', 10, 1 );

   */   

   public function where_mod( $field, $num, $result ) {

     $this->where_init($field);

     $this->wheres[$field]['$mod'] = array($num, $result);

     return($this);

   }

  /**

   * where size

   *

   *  Get the documents where the size of a field is in a given $size int

   *

   *  @usage : $this->mongo_db->where_size('foo', 1)->get('foobar');

   */

  public function where_size($field = "", $size = "") {

    $this->where_init($field);

    $this->wheres[$field]['$size'] = $size;

    return ($this);

  }

  /**

   * like条件查询(PHP中定义MongoRegex类实现)

   *

   * @usage : $this->mongo_db->like('foo', 'bar', 'im', false, false)->get();

   */

  public function like($field = "", $value = "", $flags = "i", $enable_start_wildcard = true, $enable_end_wildcard = true) {

    $field = (string)$field;

    $this->where_init($field);

    $value = (string)$value;

    $value = quotmeta($value);

    

    if (true !== $enable_start_wildcard) {

      $value = "^".$value;

    }

    

    if (true !== $enable_end_wildcard) {

      $value .= "$";

    }

    

    $regex = "/$value/$flags";

    $this->wheres[$field] = new MongoRegex($regex);

    return($this);

  }

  /**

   * order排序( 1 => ASC, -1 => DESC)

   *

   * @usage: $this->mongo_db->get_where('foo', array('name' => 'tom'))->order_by(array("age" => 1));

   */

  public function order_by($fields = array()) {

    foreach($fields as $col => $val) {

      if ($val == -1 || $val == false || strtolower($val) == "desc") {

        $this->sorts[$col] = -1;

      } else {

        $this->sorts[$col] = 1;

      }

    }

    return($this);

  }

  /**

   * limit

   *

   * @usage: $this->mongo_db->get_where('foo', array('name' => 'tom'))->limit(10);

   */

  public function limit($x = 999999) {

    if ($x !== NULL && is_numeric($x) && $x >= 1) {

      $this->limit = (int)$x;

    }

    return($this);

  }

  /**

   * offset

   *

   * @usage: $this->mongo_db->get_where('foo', array('name' => 'tom'))->offset(10);

   */

  public function offset($x = 0) {

     if($x !== NULL && is_numeric($x) && $x >= 1) {

       $this->offset = (int) $x;

     }

     return($this);

  }

  /**

   * get_where

   * 

   * @usage: $this->mongo_db->get_where('foo', array('bar' => 'something'));

   */

  public function get_where($collection = "", $where = array(), $limit = 999999) {

    return($this->where($where)->limit($limit)->get($collection));

  }

  /**

   * get

   *

   * @usage: $this->mongo_db->where(array('name' => 'tom'))->get('foo');

   */

  public function get($collection) {

    if (empty($collection)) {

      $this->log_error("In order to retreive documents from MongoDB, a collection name must be passed");

      exit;

    }

    $results = array();

    $results = $this->db->{$collection}->find($this->wheres, $this->selects)->limit((int)$this->limit)->skip((int)$this->offset)->sort($this->sorts);

    $returns = array();

    foreach($results as $result) {

      $returns[] = $result;

    }

    $this->clear();

    return($returns);

  }

  /**

   * count

   *

   * @usage: $this->db->get_where('foo', array('name' => 'tom'))->count('foo'); 

   */

  public function count($collection) {

    if (empty($collection)) {

      $this->log_error("In order to retreive documents from MongoDB, a collection name must be passed");

      exit;

    }

    $count = $this->db->{$collection}->find($this->wheres)->limit((int)$this->limit)->skip((int)$this->offset)->count();

    $this->clear();

    return($count);

  }

  /**

   * insert

   *

   * @usage: $this->mongo_db->insert('foo', array('name' => 'tom'));

   */

  public function insert($collection = "", $data = array()) {

    if (empty($collection)) {

      $this->log_error("No Mongo collection selected to delete from");

      exit;

    }

    if (count($data) == 0 || ! is_array($data)) {

      $this->log_error("Nothing to insert into Mongo collection or insert is not an array");

      exit;

    }

    try {

      $this->db->{$collection}->insert($data, array('fsync' => true));

      if (isset($data['_id'])) {

        return($data['_id']);

      } else {

        return(false);

      }

    } catch(MongoCursorException $e) {

      $this->log_error("Insert of data into MongoDB failed: {$e->getMessage()}");

      exit;

    }

  }

  /**

   * update : 利用MongoDB的 $set 实现

   *

   * @usage : $this->mongo_db->where(array('name' => 'tom'))->update('foo', array('age' => 24))

   */

  public function update($collection = "", $data = array()) {

    if (empty($collection)) {

      $this->log_error("No Mongo collection selected to delete from");

      exit;

    }

    if (count($data) == 0 || ! is_array($data)) {

      $this->log_error("Nothing to update in Mongo collection or update is not an array");

      exit;

    }

    try {

      $this->db->{$collection}->update($this->wheres, array('$set' => $data), array('fsync' => true, 'multiple' => false)); //注意: multiple为false

      return(true);

    } catch(MongoCursorException $e) {

      $this->log_error("Update of data into MongoDB failed: {$e->getMessage()}");

      exit;

    }

  }

  /**

   * update_all : 利用MongoDB的 $set 实现

   *

   * @usage : $this->mongo_db->where(array('name' => 'tom'))->update_all('foo', array('age' => 24));

   */

  public function update_all($collection = "", $data = array()) {

    if (empty($collection)) {

      $this->log_error("No Mongo collection selected to delete from");

      exit;

    }

    if (count($data) == 0 || ! is_array($data)) {

      $this->log_error("Nothing to update in Mongo collection or update is not an array");

      exit;

    }

    try {

      $this->db->{$collection}->update($this->wheres, array('$set' => $data), array('fsync' => true, 'multiple' => true)); //注意: multiple为true

      return(true);

    } catch(MongoCursorException $e) {

      $this->log_error("Update of data into MongoDB failed: {$e->getMessage()}");

      exit;

    }

  }

  /**

   * delete 

   *

   * @usage : $this->mongo_db->where(array('name' => 'tom'))->delete('foo');

   */

  public function delete($collection = "") {

    if (empty($collection)) {

      $this->log_error("No Mongo collection selected to delete from");

      exit;

    }

    try {

      $this->db->{$collection}->remove($this->wheres, array('fsync' => true, 'justOne' => true)); //注意justOne为true;

    } catch(MongoCursorException $e) {

      $this->log_error("Delete of data into MongoDB failed: {$e->getMessage()}");

      exit;

    }

  }  

  /**

   * delete_all

   *

   * @usage : $this->mongo_db->where(array('name' => 'tom'))->delete_all('foo');

   */

  public function delete_all($collection = "") {

    if (empty($collection)) {

      $this->log_error("No Mongo collection selected to delete from");

      exit;

    }

    try {

      $this->db->{$collection}->remove($this->wheres, array('fsync' => true, 'justOne' => false)); //注意justOne为false;

    } catch(MongoCursorException $e) {

      $this->log_error("Delete of data into MongoDB failed: {$e->getMessage()}");

      exit;

    }

  }

  /** 

   * add_index

   *

   * @usage : $this->mongo_db->add_index('foo', array('first_name' => 'ASC', 'last_name' => -1), array('unique' => true)));

   */

  public function add_index($collection, $keys = array(), $options = array()) {

    if (empty($collection)) {

      $this->log_error("No Mongo collection specified to add index to");

      exit;

    }

    if (empty($keys) || ! is_array($keys)) {

      $this->log_error("Index could not be created to MongoDB Collection because no keys were specified");

      exit;

    }

    foreach($keys as $col => $val) {

      if ($val == -1 || $val == false || strtolower($val) == 'desc') {

        $keys[$col] = -1;

      } else {

        $keys[$col] = 1;

      }

    }

    //在此没有对$options数组的有效性进行验证

    if (true == $this->db->{$collection}->ensureIndex($keys, $options)) {

      $this->clear();

      return($this);

    } else {

      $this->log_error("An error occured when trying to add an index to MongoDB Collection");

      exit;

    }

  }

  /**

   * remove_index

   *

   * @usage : $this->mongo_db->remove_index('foo', array('first_name' => 'ASC', 'last_name' => -1))

   */

  public function remove_index($collection = "", $keys = array()) {

    if (empty($collection)) {

      $this->log_error("No Mongo collection specified to add index to");

      exit;

    }

    if (empty($keys) || ! is_array($keys)) {

      $this->log_error("Index could not be created to MongoDB Collection because no keys were specified");

      exit;

    }

    if ($this->db->{$collection}->deleteIndex($keys)) {

      $this->clear();

      return($this);

    } else {

      $this->log_error("An error occured when trying to add an index to MongoDB Collection");

      exit;

    }

  }

  /**

   * remove_all_index

   *

   * @usage : $this->mongo_db->remove_all_index('foo', array('first_name' => 'ASC', 'last_name' => -1))

   */

  public function remove_all_index($collection = "", $keys = array()) {

    if (empty($collection)) {

      $this->log_error("No Mongo collection specified to add index to");

      exit;

    }

    if (empty($keys) || ! is_array($keys)) {

      $this->log_error("Index could not be created to MongoDB Collection because no keys were specified");

      exit;

    }

    if ($this->db->{$collection}->deleteIndexes($keys)) {

      $this->clear();

      return($this);

    } else {

      $this->log_error("An error occured when trying to add an index to MongoDB Collection");

      exit;

    }

  }

  /**

   * list_indexes

   *

   * @usage : $this->mongo_db->list_indexes('foo');

   */

  public function list_indexes($collection = "") {

    if (empty($collection)) {

      $this->log_error("No Mongo collection specified to add index to");

      exit;

    }

    return($this->db->{$collection}->getIndexInfo());

  }

  /**

   * drop_collection

   *

   * @usage : $this->mongo_db->drop_collection('foo');

   */

  public function drop_collection($collection = "") {

    if (empty($collection)) {

      $this->log_error("No Mongo collection specified to add index to");

      exit;

    }

    $this->db->{$collection}->drop();

    return(true);

  }

  /**

   * 生成连接MongoDB 参数字符串

   *

   */

  private function connection_string() {

    include_once($this->mongo_config);

    $this->host = trim($config['host']);

    $this->port = trim($config['port']);

    $this->user = trim($config['user']);

    $this->pass = trim($config['pass']);

    $this->dbname = trim($config['dbname']);

    $this->persist = trim($config['persist']);

    $this->persist_key = trim($config['persist_key']);

    $connection_string = "mongodb://";

    if (empty($this->host)) {

      $this->log_error("The Host must be set to connect to MongoDB");

      exit;

    }

    if (empty($this->dbname)) {

      $this->log_error("The Database must be set to connect to MongoDB");

      exit;

    }

    if ( ! empty($this->user) && ! empty($this->pass)) {

      $connection_string .= "{$this->user}:{$this->pass}@";

    }

    if ( isset($this->port) && ! empty($this->port)) {

      $connection_string .= "{$this->host}:{$this->port}";

    } else {

      $connection_string .= "{$this->host}";

    }

    $this->connection_string = trim($connection_string);

  }

  /**

   * 连接MongoDB 获取数据库操作句柄

   *

   */

  private function connect() {

    $options = array();

    if (true === $this->persist) {

      $options['persist'] = isset($this->persist_key) && ! empty($this->persist_key) ? $this->persist_key : "ci_mongo_persist";

    }

    try {

      $this->connection = new Mongo($this->connection_string, $options);

      $this->db = $this->connection->{$this->dbname};

      return ($this);

    } catch (MongoConnectionException $e) {

      $this->log_error("Unable to connect to MongoDB: {$e->getMessage()}");

    }

  }

  /**

   * 初始化清理部分成员变量

   * 

   */

  private function clear() {

    $this->selects = array();

    $this->wheres = array();

    $this->limit = NULL;

    $this->offset = NULL;

    $this->sorts = array();

  }

  /**

   * 依据字段名初始化处理$wheres数组

   *

   */

  private function where_init($param) {

    if ( ! isset($this->wheres[$param])) {

      $this->wheres[$param] = array();

    }

  }

  /**

   * 错误记录

   *

   */

  private function log_error($msg) {

    $msg = "[Date: ".date("Y-m-i H:i:s")."] ".$msg;

    @file_put_contents("./error.log", print_r($msg."\n", true), FILE_APPEND);

  }

}

/* End of MyMongo.php */



2. mongo_config.php配置文件：





<?php

$config["host"] = "localhost";

$config["user"] = "";

$config["pass"] = "";

$config["port"] = 27017;

$config["dbname"] = "test";

$config['persist'] = TRUE;

$config['persist_key'] = 'ci_mongo_persist';

/*End of mongo_config.php*/



3. MyMongoDemo.php文件：





&#65279;<?php

include_once("MyMongo.php");

$conn = new MyMongo();

//删除所有记录

$conn->delete_all("blog");

//插入第一条记录

$value = array("name" => "小明", "age" => 25, "addr" => array("country" => "中国", "province" => "广西", "city" => "桂林"));

$conn->insert("blog", $value);

var_dump($conn->select(array("name", "age"))->get("blog"));

var_dump($conn->get("blog"));

/* End of MyMongoDemo.php */



希望本文所述对大家的php程序设计有所帮助。